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synthv1 - an old-school polyphonic synthesizer

Home Page: https://synthv1.sourceforge.io

License: GNU General Public License v2.0

C 1.94% C++ 94.37% Roff 0.32% CMake 3.37%

synthv1's People

Contributors

Stargazers

Watchers

Forkers

eriser batlogic-forks sacarlson skyprayeraudiostudio anclark hustwbxs nomadbyte dualword tobybear swesterfeld

synthv1's Issues

synthv1 not starting in nsm

Kudos for you nsm support!

synthv1 did not start though:

[non-session-manager] Sending add for: synthv1
[nsmd] Process has pid: 24569
[nsmd] Launching synthv1
[nsmd] Error starting process: No such file or directory
[nsmd] Client synthv1 died unexpectedly.
[non-session-manager] Sending resume
[nsmd] Process has pid: 24570
[nsmd] Launching synthv1
[nsmd] Error starting process: No such file or directory
[nsmd] Client synthv1 died unexpectedly

Another bug when working with a special preset

I'm continue testing SynthV1 with REAPER. Today I've found another bug.

Preset with issue

Preset file

<!DOCTYPE synthv1>
<preset name="Sci-fi Flying 3" version="0.9.22.32git.e83414.dirty [develop]">
 <params>
  <param index="0" name="DCO1_SHAPE1">3</param>
  <param index="1" name="DCO1_WIDTH1">0.99904084205627441</param>
  <param index="2" name="DCO1_BANDL1">0</param>
  <param index="3" name="DCO1_SYNC1">-0</param>
  <param index="4" name="DCO1_SHAPE2">2</param>
  <param index="5" name="DCO1_WIDTH2">1</param>
  <param index="6" name="DCO1_BANDL2">0</param>
  <param index="7" name="DCO1_SYNC2">-0</param>
  <param index="8" name="DCO1_BALANCE">0.00459640845656395</param>
  <param index="9" name="DCO1_DETUNE">0.12084111571311951</param>
  <param index="10" name="DCO1_PHASE">0.24624323844909668</param>
  <param index="11" name="DCO1_RINGMOD">0.69593149423599243</param>
  <param index="12" name="DCO1_OCTAVE">0</param>
  <param index="13" name="DCO1_TUNING">0</param>
  <param index="14" name="DCO1_GLIDE">0.53395593166351318</param>
  <param index="15" name="DCO1_ENVTIME">0.5</param>
  <param index="16" name="DCF1_ENABLED">1</param>
  <param index="17" name="DCF1_CUTOFF">0.049604400992393494</param>
  <param index="18" name="DCF1_RESO">0</param>
  <param index="19" name="DCF1_TYPE">-0</param>
  <param index="20" name="DCF1_SLOPE">2</param>
  <param index="21" name="DCF1_ENVELOPE">0.52650606632232666</param>
  <param index="22" name="DCF1_ATTACK">0.12538035213947296</param>
  <param index="23" name="DCF1_DECAY">0.5547826886177063</param>
  <param index="24" name="DCF1_SUSTAIN">0.69639170169830322</param>
  <param index="25" name="DCF1_RELEASE">0.56676125526428223</param>
  <param index="26" name="LFO1_ENABLED">1</param>
  <param index="27" name="LFO1_SHAPE">-0</param>
  <param index="28" name="LFO1_WIDTH">1</param>
  <param index="29" name="LFO1_BPM">96.970710754394531</param>
  <param index="30" name="LFO1_RATE">0.60932046175003052</param>
  <param index="31" name="LFO1_SYNC">0</param>
  <param index="32" name="LFO1_SWEEP">0.16489776968955994</param>
  <param index="33" name="LFO1_PITCH">-0.44400355219841003</param>
  <param index="34" name="LFO1_BALANCE">-0.83026361465454102</param>
  <param index="35" name="LFO1_RINGMOD">0.065328940749168396</param>
  <param index="36" name="LFO1_CUTOFF">-0.082021772861480713</param>
  <param index="37" name="LFO1_RESO">-1</param>
  <param index="38" name="LFO1_PANNING">-0.36444777250289917</param>
  <param index="39" name="LFO1_VOLUME">-0.016584195196628571</param>
  <param index="40" name="LFO1_ATTACK">0.023350061848759651</param>
  <param index="41" name="LFO1_DECAY">0.75658077001571655</param>
  <param index="42" name="LFO1_SUSTAIN">0.98371082544326782</param>
  <param index="43" name="LFO1_RELEASE">0.33027938008308411</param>
  <param index="44" name="DCA1_VOLUME">1</param>
  <param index="45" name="DCA1_ATTACK">0.47323614358901978</param>
  <param index="46" name="DCA1_DECAY">0.17921185493469238</param>
  <param index="47" name="DCA1_SUSTAIN">1</param>
  <param index="48" name="DCA1_RELEASE">0.48525571823120117</param>
  <param index="49" name="OUT1_WIDTH">0</param>
  <param index="50" name="OUT1_PANNING">0</param>
  <param index="51" name="OUT1_FXSEND">1</param>
  <param index="52" name="OUT1_VOLUME">0.37999999523162842</param>
  <param index="53" name="DEF1_PITCHBEND">0.20000000298023224</param>
  <param index="54" name="DEF1_MODWHEEL">0.20000000298023224</param>
  <param index="55" name="DEF1_PRESSURE">0.20000000298023224</param>
  <param index="56" name="DEF1_VELOCITY">0.20000000298023224</param>
  <param index="57" name="DEF1_CHANNEL">0</param>
  <param index="58" name="DEF1_MONO">0</param>
  <param index="59" name="DCO2_SHAPE1">1</param>
  <param index="60" name="DCO2_WIDTH1">0.95175236463546753</param>
  <param index="61" name="DCO2_BANDL1">0</param>
  <param index="62" name="DCO2_SYNC1">0</param>
  <param index="63" name="DCO2_SHAPE2">2</param>
  <param index="64" name="DCO2_WIDTH2">0.85896515846252441</param>
  <param index="65" name="DCO2_BANDL2">-0</param>
  <param index="66" name="DCO2_SYNC2">-0</param>
  <param index="67" name="DCO2_BALANCE">0.16226750612258911</param>
  <param index="68" name="DCO2_DETUNE">0.00879296101629734</param>
  <param index="69" name="DCO2_PHASE">0.60693609714508057</param>
  <param index="70" name="DCO2_RINGMOD">0</param>
  <param index="71" name="DCO2_OCTAVE">-2</param>
  <param index="72" name="DCO2_TUNING">0</param>
  <param index="73" name="DCO2_GLIDE">0.6011883020401001</param>
  <param index="74" name="DCO2_ENVTIME">0.5</param>
  <param index="75" name="DCF2_ENABLED">1</param>
  <param index="76" name="DCF2_CUTOFF">0.17431449890136719</param>
  <param index="77" name="DCF2_RESO">0.061738401651382446</param>
  <param index="78" name="DCF2_TYPE">0</param>
  <param index="79" name="DCF2_SLOPE">1</param>
  <param index="80" name="DCF2_ENVELOPE">1</param>
  <param index="81" name="DCF2_ATTACK">0.071791119873523712</param>
  <param index="82" name="DCF2_DECAY">0.45163959264755249</param>
  <param index="83" name="DCF2_SUSTAIN">0.54555881023406982</param>
  <param index="84" name="DCF2_RELEASE">0.59177297353744507</param>
  <param index="85" name="LFO2_ENABLED">1</param>
  <param index="86" name="LFO2_SHAPE">3</param>
  <param index="87" name="LFO2_WIDTH">0.52772045135498047</param>
  <param index="88" name="LFO2_BPM">293.73703002929687</param>
  <param index="89" name="LFO2_RATE">0.26580163836479187</param>
  <param index="90" name="LFO2_SYNC">-0</param>
  <param index="91" name="LFO2_SWEEP">-0.6928020715713501</param>
  <param index="92" name="LFO2_PITCH">0.40426778793334961</param>
  <param index="93" name="LFO2_BALANCE">0.086928427219390869</param>
  <param index="94" name="LFO2_RINGMOD">0.40468224883079529</param>
  <param index="95" name="LFO2_CUTOFF">-0.21630749106407166</param>
  <param index="96" name="LFO2_RESO">0.61858391761779785</param>
  <param index="97" name="LFO2_PANNING">-0.62312740087509155</param>
  <param index="98" name="LFO2_VOLUME">0.045989662408828735</param>
  <param index="99" name="LFO2_ATTACK">0.002971498528495431</param>
  <param index="100" name="LFO2_DECAY">0.29200303554534912</param>
  <param index="101" name="LFO2_SUSTAIN">1</param>
  <param index="102" name="LFO2_RELEASE">0.37740409374237061</param>
  <param index="103" name="DCA2_VOLUME">0.22757060825824738</param>
  <param index="104" name="DCA2_ATTACK">0</param>
  <param index="105" name="DCA2_DECAY">0.043900132179260254</param>
  <param index="106" name="DCA2_SUSTAIN">0.68884670734405518</param>
  <param index="107" name="DCA2_RELEASE">0.13113300502300262</param>
  <param index="108" name="OUT2_WIDTH">0</param>
  <param index="109" name="OUT2_PANNING">0</param>
  <param index="110" name="OUT2_FXSEND">1</param>
  <param index="111" name="OUT2_VOLUME">0.40000000596046448</param>
  <param index="112" name="DEF2_PITCHBEND">0.20000000298023224</param>
  <param index="113" name="DEF2_MODWHEEL">0.20000000298023224</param>
  <param index="114" name="DEF2_PRESSURE">0.20000000298023224</param>
  <param index="115" name="DEF2_VELOCITY">0.20000000298023224</param>
  <param index="116" name="DEF2_CHANNEL">0</param>
  <param index="117" name="DEF2_MONO">0</param>
  <param index="118" name="CHO1_WET">0</param>
  <param index="119" name="CHO1_DELAY">0.5</param>
  <param index="120" name="CHO1_FEEDB">0.5</param>
  <param index="121" name="CHO1_RATE">0.5</param>
  <param index="122" name="CHO1_MOD">0.5</param>
  <param index="123" name="FLA1_WET">0</param>
  <param index="124" name="FLA1_DELAY">0.5</param>
  <param index="125" name="FLA1_FEEDB">0.5</param>
  <param index="126" name="FLA1_DAFT">0</param>
  <param index="127" name="PHA1_WET">0</param>
  <param index="128" name="PHA1_RATE">0.5</param>
  <param index="129" name="PHA1_FEEDB">0.5</param>
  <param index="130" name="PHA1_DEPTH">0.5</param>
  <param index="131" name="PHA1_DAFT">0</param>
  <param index="132" name="DEL1_WET">0</param>
  <param index="133" name="DEL1_DELAY">0.5</param>
  <param index="134" name="DEL1_FEEDB">0.5</param>
  <param index="135" name="DEL1_BPM">180</param>
  <param index="136" name="REV1_WET">0.5</param>
  <param index="137" name="REV1_ROOM">0.5</param>
  <param index="138" name="REV1_DAMP">0.5</param>
  <param index="139" name="REV1_FEEDB">0.5</param>
  <param index="140" name="REV1_WIDTH">0</param>
  <param index="141" name="DYN1_COMPRESS">0</param>
  <param index="142" name="DYN1_LIMITER">1</param>
  <param index="143" name="KEY1_LOW">0</param>
  <param index="144" name="KEY1_HIGH">127</param>
 </params>
</preset>

How to reveal this bug

Load this preset;
Play note Db7 -> E3 -> Db7.

GDB Backtrace

Thread 9 received signal SIGSEGV, Segmentation fault.
[Switching to Thread 16832.0xe00]
--Type <RET> for more, q to quit, c to continue without paging--
synthv1_wave::interp (this=0x3268fd0, i=4294967277, itab=8, alpha=-4.2949673e+09) at ../src/synthv1_wave.h:144
144                     const float x0 = frames[i];
(gdb) bt
#0  synthv1_wave::interp (this=0x3268fd0, i=4294967277, itab=8, alpha=-4.2949673e+09) at ../src/synthv1_wave.h:144
#1  0x00007ffaa061f207 in synthv1_wave::sample (this=0x3268fd0, phase=..., freq=-235.58374)
    at ../src/synthv1_wave.h:135
#2  0x00007ffaa01bd220 in synthv1_oscillator::sample (this=0x1225b6b8, freq=-235.58374) at ../src/synthv1_wave.h:295
#3  0x00007ffa9fef6685 in synthv1_impl::process (this=0x3268fd0, ins=0xb43ea60, outs=0xb43ea50, nframes=2048)
    at ../src/synthv1.cpp:2509
#4  0x00007ffaa04a0bda in synthv1::process (this=0x3267f50, ins=0xb43ea60, outs=0xb43ea50, nframes=2048)
    at ../src/synthv1.cpp:2878
#5  0x00007ffa9fe467b7 in synthv1_lv2::run (this=0x3267f50, nframes=2048) at ../src/synthv1_lv2.cpp:362
#6  0x00007ffa9fd199ed in synthv1_lv2_run (instance=0x3267f50, nframes=2048) at ../src/synthv1_lv2.cpp:828
#7  0x000000014005afde in ?? ()
#8  0x00000001403a2943 in ?? ()
#9  0x00000001403cca72 in ?? ()
#10 0x000000014076a101 in ?? ()
#11 0x000000014077211f in ?? ()
#12 0x0000000140761a9d in ?? ()
#13 0x00000001408c5d28 in ?? ()
#14 0x00000001408e5397 in ?? ()
#15 0x00000001408e546f in ?? ()
#16 0x00007ffb0aed7034 in KERNEL32!BaseThreadInitThunk () from C:\WINDOWS\System32\kernel32.dll
#17 0x00007ffb0c0c2651 in ntdll!RtlUserThreadStart () from C:\WINDOWS\SYSTEM32\ntdll.dll
#18 0x0000000000000000 in ?? ()
Backtrace stopped: previous frame inner to this frame (corrupt stack?)

feature request: oscillators sync

please consider implementing oscillators sync feature (when osc 2 is reset on every cycle of osc 1).

Required and optional dependencies don't provide lv2/lv2plug.in/ns/extensions/ui/ui.h

I have all required and optional dependencies installed but the file lv2/lv2plug.in/ns/extensions/ui/ui.h required by this line https://github.com/rncbc/synthv1/blob/master/CMakeLists.txt#L220 is still not found.

A revers sample button

A revers sample button that can be automated and for live uses.

LV2 plugin UI resize

Hi Rui,

Some hosts like REAPER can ignore the minimum size limitation, so the window can be resized like this:

Or this:

What's more, if I drag the window to a smaller size like the screenshot above, it will crash:

Is there any solution to prevent the UI from being resized casually, or just clip the UI (with scrollbar) when the host window size is smaller than the minimal size?

Question about porting SynthV1 to VST

Now I've ported synthv1 to VST, see https://github.com/anclark/synthv1/tree/vst-implementation, and available for both Linux and Windows. But it's not stable enough, still requiring more tests, and I'm still encountering a critical problem on processing.

System environment

Host: REAPER v6.36
Audio system: ALSA, with integrated Conexant HDA card

Problems

When playing a MIDI sequence with sustain pedal activated, I will hear stitiches. This will also happen on any other sequences.
Sound output will be terribly distorted when continue inputing musical notes as sustain pedal activated.

Both problems are not exist on LV2 edition.

Note

VST-related codes are mainly in src, with keyword vst in filenames. For example, the main VST code is in synthv1_vst.cpp.

A parameter to randomize synth parameter values

I propose a parameter that sets the "randomize current parameter values". For example, I would set it to 20% or even more... find an interesting strange pad P, and than change the parameter to 1% and find something that works close to P.

Also, I propose to remove the warning popup since is not practical, and prevents quickly to make another random request.

pre built lv2

could do a pre built lv2 plugin or do installer for window or mac so us win/mac can users can try your plugins in our daw's that have lv2 without having built them?

port audio and core audio support

synthv1_wave::sample() overflow when working with DAW

Here I have a new bug when working with REAPER on Windows. Seems that synthv1_wave::sample() generated an overflown value, then passed to synthv1_wave::interp().

Backtrace from GDB:

--Type <RET> for more, q to quit, c to continue without paging--

Thread 28 received signal SIGSEGV, Segmentation fault.
[Switching to Thread 10788.0x2284]
synthv1_wave::interp (this=0xad3b2e0, i=4294967295, itab=8, alpha=-4.2949673e+09) at ../src/synthv1_wave.h:144
144                     const float x0 = frames[i];
(gdb) bt
#0  synthv1_wave::interp (this=0xad3b2e0, i=4294967295, itab=8, alpha=-4.2949673e+09) at ../src/synthv1_wave.h:144
#1  0x00007ffd7092f03c in synthv1_wave::sample (this=0xad3b2e0, phase=..., freq=-0.623733521)
    at ../src/synthv1_wave.h:135
#2  0x00007ffd704cd060 in synthv1_oscillator::sample (this=0xadfd2d8, freq=-0.623733521) at ../src/synthv1_wave.h:295
#3  0x00007ffd70206525 in synthv1_impl::process (this=0xad3b2e0, ins=0xa58ea60, outs=0xa58ea50, nframes=384)
    at ../src/synthv1.cpp:2464
#4  0x00007ffd707b0a1a in synthv1::process (this=0x31e7280, ins=0xa58ea60, outs=0xa58ea50, nframes=384)
    at ../src/synthv1.cpp:2833
#5  0x00007ffd701567b7 in synthv1_lv2::run (this=0x31e7280, nframes=384) at ../src/synthv1_lv2.cpp:362
#6  0x00007ffd700299ed in synthv1_lv2_run (instance=0x31e7280, nframes=384) at ../src/synthv1_lv2.cpp:828
#7  0x000000014005afde in ?? ()
#8  0x00000001403a2943 in ?? ()
#9  0x00000001403cca72 in ?? ()
#10 0x000000014076a101 in ?? ()
#11 0x000000014077211f in ?? ()
#12 0x0000000140761a9d in ?? ()
#13 0x00000001408c5d28 in ?? ()
#14 0x00000001408e5397 in ?? ()
#15 0x00000001408e546f in ?? ()
#16 0x00007ffdc96b7034 in KERNEL32!BaseThreadInitThunk () from C:\WINDOWS\System32\kernel32.dll
#17 0x00007ffdca702651 in ntdll!RtlUserThreadStart () from C:\WINDOWS\SYSTEM32\ntdll.dll
#18 0x0000000000000000 in ?? ()
Backtrace stopped: previous frame inner to this frame (corrupt stack?)

std::bad_alloc with Ardour and play-loop

After no response on IRC, I tried to report this on Sourceforge, but creating a ticket there failed with 405, method not allowed.

Segfault of Ardour (current git) with terminate called after throwing an instance of 'std::bad_alloc', when the end of the loop range is reached during play-loop and a LV2 instance of synthv1 is enabled. No crash if the plugin is disabled.

The Ardour/play-loop/synthv1 combination used to work, so either a recent Ardour update triggered the issue, or there must be another ingredient. I now have an Ardour session that will crash everytime if one just starts play-loop after loading. No such issue with other synth plugins.

Backtrace:

terminate called after throwing an instance of 'std::bad_alloc'
  what():  std::bad_alloc
Aborted (core dumped)
/media/hd/src/ardour_git/gtk2_ardour: ./ardbg
GNU gdb (Ubuntu 7.7.1-0ubuntu5~14.04.2) 7.7.1
Copyright (C) 2014 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from ./../build/gtk2_ardour/ardour-4.6.262...done.
(gdb) core-file core
[New LWP 10797]
[New LWP 10799]
[New LWP 10802]
[New LWP 10800]
[New LWP 10803]
[New LWP 10801]
[New LWP 10804]
[New LWP 10810]
[New LWP 10777]
[New LWP 10778]
[New LWP 10779]
[New LWP 10798]
[New LWP 10805]
[New LWP 10771]
[New LWP 10809]
[New LWP 10772]
[New LWP 10773]
[New LWP 10774]
[New LWP 10775]
[New LWP 10776]
[New LWP 10795]
[New LWP 10796]
[New LWP 10768]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Traceback (most recent call last):
  File "/usr/share/gdb/auto-load/usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.19-gdb.py", line 63, in <module>
    from libstdcxx.v6.printers import register_libstdcxx_printers
ImportError: No module named 'libstdcxx'
Core was generated by `./../build/gtk2_ardour/ardour-4.6.262 /media/hd/audio/cramned'.
Program terminated with signal SIGABRT, Aborted.
#0  0x00007f6733ea8cc9 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
56  ../nptl/sysdeps/unix/sysv/linux/raise.c: No such file or directory.
(gdb) thread apply all bt

Thread 23 (Thread 0x7f673b87ba00 (LWP 10768)):
#0  0x00007f6733f5f12d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f6738173fe4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f673817430a in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6737c19447 in gtk_main () from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
#4  0x00007f673ae733d6 in Gtkmm2ext::UI::run (this=0x35492d0, old_receiver=...) at ../libs/gtkmm2ext/gtk_ui.cc:284
#5  0x0000000000a41eca in main (argc=2, argv=0x7ffeed4064b8) at ../gtk2_ardour/main.cc:396

Thread 22 (Thread 0x7f6705bc6700 (LWP 10796)):
#0  0x00007f67355213bd in read () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f6716bd404e in Jack::JackClientSocket::Read(void*, int) () from /usr/lib/libjack.so.0
#2  0x00007f6716bd7525 in Jack::JackClientNotification::Read(Jack::detail::JackChannelTransactionInterface*) () from /usr/lib/libjack.so.0
#3  0x00007f6716bd723a in Jack::JackSocketClientChannel::Execute() () from /usr/lib/libjack.so.0
#4  0x00007f6716bd1c1a in Jack::JackPosixThread::ThreadHandler(void*) () from /usr/lib/libjack.so.0
#5  0x00007f673551a182 in start_thread (arg=0x7f6705bc6700) at pthread_create.c:312
#6  0x00007f6733f6c47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 21 (Thread 0x7f6705c47700 (LWP 10795)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f6716bd30dc in Jack::JackPosixProcessSync::Wait() () from /usr/lib/libjack.so.0
#2  0x00007f6716bcbdab in Jack::JackMessageBuffer::Execute() () from /usr/lib/libjack.so.0
#3  0x00007f6716bd1c1a in Jack::JackPosixThread::ThreadHandler(void*) () from /usr/lib/libjack.so.0
#4  0x00007f673551a182 in start_thread (arg=0x7f6705c47700) at pthread_create.c:312
#5  0x00007f6733f6c47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 20 (Thread 0x7f67177fe700 (LWP 10776)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f67381b5bf7 in g_cond_wait () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f673a14aef0 in ARDOUR::AudioEngine::do_devicelist_update (this=0x357cda0) at ../libs/ardour/audioengine.cc:559
#3  0x00007f673a156ee5 in boost::_mfi::mf0<void, ARDOUR::AudioEngine>::operator() (this=0x362cce0, p=0x357cda0)
    at /usr/include/boost/bind/mem_fn_template.hpp:49
#4  0x00007f673a156b26 in boost::_bi::list1<boost::_bi::value<ARDOUR::AudioEngine*> >::operator()<boost::_mfi::mf0<void, ARDOUR::AudioEngine>, boost::_bi::list0> (this=0x362ccf0, f=..., a=...) at /usr/include/boost/bind/bind.hpp:253
#5  0x00007f673a15648f in boost::_bi::bind_t<void, boost::_mfi::mf0<void, ARDOUR::AudioEngine>, boost::_bi::list1<boost::_bi::value<ARDOUR::AudioEngine*> > >::operator() (this=0x362cce0) at /usr/include/boost/bind/bind_template.hpp:20
#6  0x00007f673a155c66 in sigc::adaptor_functor<boost::_bi::bind_t<void, boost::_mfi::mf0<void, ARDOUR::AudioEngine>, boost::_bi::list1<boost::_bi::value<ARDOUR::AudioEngine*> > > >::operator() (this=0x362cce0) at /usr/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:251
#7  0x00007f673a154e78 in sigc::internal::slot_call0<boost::_bi::bind_t<void, boost::_mfi::mf0<void, ARDOUR::AudioEngine>, boost::_bi::list1<boost::_bi::value<ARDOUR::AudioEngine*> > >, void>::call_it (rep=0x362ccb0) at /usr/include/sigc++-2.0/sigc++/functors/slot.h:103
---Type <return> to continue, or q <return> to quit---
#8  0x00007f67388cb11d in ?? () from /usr/lib/x86_64-linux-gnu/libglibmm-2.4.so.1
#9  0x00007f6738198f05 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#10 0x00007f673551a182 in start_thread (arg=0x7f67177fe700) at pthread_create.c:312
#11 0x00007f6733f6c47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 19 (Thread 0x7f6717fff700 (LWP 10775)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f67381b5bf7 in g_cond_wait () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f673a14accf in ARDOUR::AudioEngine::do_reset_backend (this=0x357cda0) at ../libs/ardour/audioengine.cc:524
#3  0x00007f673a156ee5 in boost::_mfi::mf0<void, ARDOUR::AudioEngine>::operator() (this=0x362c2d0, p=0x357cda0)
    at /usr/include/boost/bind/mem_fn_template.hpp:49
#4  0x00007f673a156b26 in boost::_bi::list1<boost::_bi::value<ARDOUR::AudioEngine*> >::operator()<boost::_mfi::mf0<void, ARDOUR::AudioEngine>, boost::_bi::list0> (this=0x362c2e0, f=..., a=...) at /usr/include/boost/bind/bind.hpp:253
#5  0x00007f673a15648f in boost::_bi::bind_t<void, boost::_mfi::mf0<void, ARDOUR::AudioEngine>, boost::_bi::list1<boost::_bi::value<ARDOUR::AudioEngine*> > >::operator() (this=0x362c2d0) at /usr/include/boost/bind/bind_template.hpp:20
#6  0x00007f673a155c66 in sigc::adaptor_functor<boost::_bi::bind_t<void, boost::_mfi::mf0<void, ARDOUR::AudioEngine>, boost::_bi::list1<boost::_bi::value<ARDOUR::AudioEngine*> > > >::operator() (this=0x362c2d0) at /usr/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:251
#7  0x00007f673a154e78 in sigc::internal::slot_call0<boost::_bi::bind_t<void, boost::_mfi::mf0<void, ARDOUR::AudioEngine>, boost::_bi::list1<boost::_bi::value<ARDOUR::AudioEngine*> > >, void>::call_it (rep=0x362c2a0) at /usr/include/sigc++-2.0/sigc++/functors/slot.h:103
#8  0x00007f67388cb11d in ?? () from /usr/lib/x86_64-linux-gnu/libglibmm-2.4.so.1
#9  0x00007f6738198f05 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#10 0x00007f673551a182 in start_thread (arg=0x7f6717fff700) at pthread_create.c:312
#11 0x00007f6733f6c47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 18 (Thread 0x7f672626b700 (LWP 10774)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f67381b5bf7 in g_cond_wait () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f673a0fbe98 in ARDOUR::Analyser::work () at ../libs/ardour/analyser.cc:86
#3  0x00007f673a0fbc8d in analyser_work () at ../libs/ardour/analyser.cc:51
#4  0x0000000000c561e9 in sigc::pointer_functor0<void>::operator() (this=0x36373a8) at /usr/include/sigc++-2.0/sigc++/functors/ptr_fun.h:77
#5  0x0000000000c535a8 in sigc::adaptor_functor<sigc::pointer_functor0<void> >::operator() (this=0x36373a0)
    at /usr/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:251
#6  0x0000000000c4feaf in sigc::internal::slot_call0<sigc::pointer_functor0<void>, void>::call_it (rep=0x3637370)
    at /usr/include/sigc++-2.0/sigc++/functors/slot.h:103
#7  0x00007f67388cb11d in ?? () from /usr/lib/x86_64-linux-gnu/libglibmm-2.4.so.1
#8  0x00007f6738198f05 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#9  0x00007f673551a182 in start_thread (arg=0x7f672626b700) at pthread_create.c:312
#10 0x00007f6733f6c47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 17 (Thread 0x7f6726a6c700 (LWP 10773)):
---Type <return> to continue, or q <return> to quit---
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f67381b5bf7 in g_cond_wait () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f673a569288 in peak_thread_work () at ../libs/ardour/source_factory.cc:71
#3  0x0000000000c561e9 in sigc::pointer_functor0<void>::operator() (this=0x3538198) at /usr/include/sigc++-2.0/sigc++/functors/ptr_fun.h:77
#4  0x0000000000c535a8 in sigc::adaptor_functor<sigc::pointer_functor0<void> >::operator() (this=0x3538190)
    at /usr/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:251
#5  0x0000000000c4feaf in sigc::internal::slot_call0<sigc::pointer_functor0<void>, void>::call_it (rep=0x3538160)
    at /usr/include/sigc++-2.0/sigc++/functors/slot.h:103
#6  0x00007f67388cb11d in ?? () from /usr/lib/x86_64-linux-gnu/libglibmm-2.4.so.1
#7  0x00007f6738198f05 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#8  0x00007f673551a182 in start_thread (arg=0x7f6726a6c700) at pthread_create.c:312
#9  0x00007f6733f6c47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 16 (Thread 0x7f672726d700 (LWP 10772)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f67381b5bf7 in g_cond_wait () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f673a569288 in peak_thread_work () at ../libs/ardour/source_factory.cc:71
#3  0x0000000000c561e9 in sigc::pointer_functor0<void>::operator() (this=0x36377a8) at /usr/include/sigc++-2.0/sigc++/functors/ptr_fun.h:77
#4  0x0000000000c535a8 in sigc::adaptor_functor<sigc::pointer_functor0<void> >::operator() (this=0x36377a0)
    at /usr/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:251
#5  0x0000000000c4feaf in sigc::internal::slot_call0<sigc::pointer_functor0<void>, void>::call_it (rep=0x3637770)
    at /usr/include/sigc++-2.0/sigc++/functors/slot.h:103
#6  0x00007f67388cb11d in ?? () from /usr/lib/x86_64-linux-gnu/libglibmm-2.4.so.1
#7  0x00007f6738198f05 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#8  0x00007f673551a182 in start_thread (arg=0x7f672726d700) at pthread_create.c:312
#9  0x00007f6733f6c47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 15 (Thread 0x7f66c7ae9700 (LWP 10809)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f67381b5bf7 in g_cond_wait () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f673b218abf in ArdourCanvas::WaveView::drawing_thread () at ../libs/canvas/wave_view.cc:1543
#3  0x0000000000c561e9 in sigc::pointer_functor0<void>::operator() (this=0x15e73708) at /usr/include/sigc++-2.0/sigc++/functors/ptr_fun.h:77
#4  0x0000000000c535a8 in sigc::adaptor_functor<sigc::pointer_functor0<void> >::operator() (this=0x15e73700)
    at /usr/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:251
#5  0x0000000000c4feaf in sigc::internal::slot_call0<sigc::pointer_functor0<void>, void>::call_it (rep=0x15e736d0)
    at /usr/include/sigc++-2.0/sigc++/functors/slot.h:103
#6  0x00007f67388cb11d in ?? () from /usr/lib/x86_64-linux-gnu/libglibmm-2.4.so.1
#7  0x00007f6738198f05 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#8  0x00007f673551a182 in start_thread (arg=0x7f66c7ae9700) at pthread_create.c:312
#9  0x00007f6733f6c47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111
---Type <return> to continue, or q <return> to quit---

Thread 14 (Thread 0x7f6727a6e700 (LWP 10771)):
#0  0x00007f6735521b9d in nanosleep () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f673819a498 in g_usleep () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x0000000000f26e02 in gui_event_loop (ptr=0x0) at ../gtk2_ardour/linux_vst_gui_support.cc:475
#3  0x00007f673551a182 in start_thread (arg=0x7f6727a6e700) at pthread_create.c:312
#4  0x00007f6733f6c47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 13 (Thread 0x7f66c82ea700 (LWP 10805)):
#0  0x00007f6735521b9d in nanosleep () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f673819a498 in g_usleep () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f673a19bbca in ARDOUR::AutomationWatch::thread (this=0x1814eb80) at ../libs/ardour/automation_watch.cc:153
#3  0x00007f673a19ef03 in boost::_mfi::mf0<void, ARDOUR::AutomationWatch>::operator() (this=0x89fb420, p=0x1814eb80)
    at /usr/include/boost/bind/mem_fn_template.hpp:49
#4  0x00007f673a19eb70 in boost::_bi::list1<boost::_bi::value<ARDOUR::AutomationWatch*> >::operator()<boost::_mfi::mf0<void, ARDOUR::AutomationWatch>, boost::_bi::list0> (this=0x89fb430, f=..., a=...) at /usr/include/boost/bind/bind.hpp:253
#5  0x00007f673a19e70b in boost::_bi::bind_t<void, boost::_mfi::mf0<void, ARDOUR::AutomationWatch>, boost::_bi::list1<boost::_bi::value<ARDOUR::AutomationWatch*> > >::operator() (this=0x89fb420) at /usr/include/boost/bind/bind_template.hpp:20
#6  0x00007f673a19e6a0 in sigc::adaptor_functor<boost::_bi::bind_t<void, boost::_mfi::mf0<void, ARDOUR::AutomationWatch>, boost::_bi::list1<boost::_bi::value<ARDOUR::AutomationWatch*> > > >::operator() (this=0x89fb420) at /usr/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:251
#7  0x00007f673a19e208 in sigc::internal::slot_call0<boost::_bi::bind_t<void, boost::_mfi::mf0<void, ARDOUR::AutomationWatch>, boost::_bi::list1<boost::_bi::value<ARDOUR::AutomationWatch*> > >, void>::call_it (rep=0x89fb3f0) at /usr/include/sigc++-2.0/sigc++/functors/slot.h:103
#8  0x00007f67388cb11d in ?? () from /usr/lib/x86_64-linux-gnu/libglibmm-2.4.so.1
#9  0x00007f6738198f05 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#10 0x00007f673551a182 in start_thread (arg=0x7f66c82ea700) at pthread_create.c:312
#11 0x00007f6733f6c47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 12 (Thread 0x7f6705ac3800 (LWP 10798)):
#0  0x00007f6733f5f12d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f6738ffd37c in CrossThreadChannel::poll_for_request (this=0x4630db0) at ../libs/pbd/crossthread.posix.cc:80
#2  0x00007f6738ffd3e5 in CrossThreadChannel::receive (this=0x4630db0, msg=@0x7f6705ac2c00: 0 '\000', wait=true)
    at ../libs/pbd/crossthread.posix.cc:101
#3  0x00007f673a1af244 in ARDOUR::Butler::thread_work (this=0x4630d20) at ../libs/ardour/butler.cc:175
#4  0x00007f673a1af025 in ARDOUR::Butler::_thread_work (arg=0x4630d20) at ../libs/ardour/butler.cc:156
#5  0x00007f67390177c0 in fake_thread_start (arg=0xbbfa440) at ../libs/pbd/pthread_utils.cc:101
#6  0x00007f673551a182 in start_thread (arg=0x7f6705ac3800) at pthread_create.c:312
#7  0x00007f6733f6c47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 11 (Thread 0x7f6706c9b700 (LWP 10779)):
#0  0x00007f6733f5f12d in poll () at ../sysdeps/unix/syscall-template.S:81
---Type <return> to continue, or q <return> to quit---
#1  0x00007f6738173fe4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f67381740ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6738174129 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f6738198f05 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f673551a182 in start_thread (arg=0x7f6706c9b700) at pthread_create.c:312
#6  0x00007f6733f6c47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 10 (Thread 0x7f6714a04700 (LWP 10778)):
#0  0x00007f6733f5f12d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f6738173fe4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f673817430a in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f673114a336 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007f6738198f05 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f673551a182 in start_thread (arg=0x7f6714a04700) at pthread_create.c:312
#6  0x00007f6733f6c47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 9 (Thread 0x7f6715205700 (LWP 10777)):
#0  0x00007f6733f5f12d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f6738173fe4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f67381740ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f671520d1ad in ?? () from /usr/lib/x86_64-linux-gnu/gio/modules/libdconfsettings.so
#4  0x00007f6738198f05 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f673551a182 in start_thread (arg=0x7f6715205700) at pthread_create.c:312
#6  0x00007f6733f6c47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 8 (Thread 0x7f66c6ae7700 (LWP 10810)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
#1  0x00007f67381b5ce5 in g_cond_wait_until () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f673814a1c1 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f673814a74b in g_async_queue_timeout_pop () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f6738199956 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f6738198f05 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f673551a182 in start_thread (arg=0x7f66c6ae7700) at pthread_create.c:312
#7  0x00007f6733f6c47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 7 (Thread 0x7f66e52be700 (LWP 10804)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f673a50200c in ARDOUR::Session::emit_thread_run (this=0x4d926b0) at ../libs/ardour/session_process.cc:1313
#2  0x00007f673a501fb6 in ARDOUR::Session::emit_thread (arg=0x4d926b0) at ../libs/ardour/session_process.cc:1302
#3  0x00007f673551a182 in start_thread (arg=0x7f66e52be700) at pthread_create.c:312
---Type <return> to continue, or q <return> to quit---
#4  0x00007f6733f6c47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 6 (Thread 0x7f66e62c0700 (LWP 10801)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f66cf3f67fa in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f66cfc68733 in synthv1_sched_thread::run() () from /usr/local/lib/lv2/synthv1.lv2/synthv1.so
#3  0x00007f66cf3f6233 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f673551a182 in start_thread (arg=0x7f66e62c0700) at pthread_create.c:312
#5  0x00007f6733f6c47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 5 (Thread 0x7f66c8cf0700 (LWP 10803)):
#0  0x00007f6733f5f12d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f6738173fe4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f673817430a in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6738fe7d8b in BaseUI::main_thread (this=0x85740c8) at ../libs/pbd/base_ui.cc:86
#4  0x00007f6738feb9c6 in sigc::bound_mem_functor0<void, BaseUI>::operator() (this=0xa135788)
    at /usr/include/sigc++-2.0/sigc++/functors/mem_fun.h:1787
#5  0x00007f6738feb71a in sigc::adaptor_functor<sigc::bound_mem_functor0<void, BaseUI> >::operator() (this=0xa135780)
    at /usr/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:251
#6  0x00007f6738feb245 in sigc::internal::slot_call0<sigc::bound_mem_functor0<void, BaseUI>, void>::call_it (rep=0xa135750)
    at /usr/include/sigc++-2.0/sigc++/functors/slot.h:103
#7  0x00007f67388cb11d in ?? () from /usr/lib/x86_64-linux-gnu/libglibmm-2.4.so.1
#8  0x00007f6738198f05 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#9  0x00007f673551a182 in start_thread (arg=0x7f66c8cf0700) at pthread_create.c:312
#10 0x00007f6733f6c47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 4 (Thread 0x7f66e6ac1700 (LWP 10800)):
#0  0x00007f6733f63da3 in select () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f66d0d057dd in ?? () from /usr/local/lib/lv2/Obxd.lv2/Obxd.so
#2  0x00007f66d0d05b4f in ?? () from /usr/local/lib/lv2/Obxd.lv2/Obxd.so
#3  0x00007f66d0ccde87 in ?? () from /usr/local/lib/lv2/Obxd.lv2/Obxd.so
#4  0x00007f66d0cfbc24 in ?? () from /usr/local/lib/lv2/Obxd.lv2/Obxd.so
#5  0x00007f66d0cfbe59 in ?? () from /usr/local/lib/lv2/Obxd.lv2/Obxd.so
#6  0x00007f673551a182 in start_thread (arg=0x7f66e6ac1700) at pthread_create.c:312
#7  0x00007f6733f6c47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 3 (Thread 0x7f66e5abf700 (LWP 10802)):
#0  0x00007f6733f63da3 in select () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f66ca9de65d in juce::MessageManager::dispatchNextMessageOnSystemQueue(bool) () from /usr/local/lib/lv2/helm.lv2/helm.so
#2  0x00007f66ca9de877 in juce::MessageManager::runDispatchLoop() () from /usr/local/lib/lv2/helm.lv2/helm.so
---Type <return> to continue, or q <return> to quit---
#3  0x00007f66cab73d97 in SharedMessageThread::run() () from /usr/local/lib/lv2/helm.lv2/helm.so
#4  0x00007f66ca99143a in juce::Thread::threadEntryPoint() () from /usr/local/lib/lv2/helm.lv2/helm.so
#5  0x00007f66ca9915c9 in threadEntryProc () from /usr/local/lib/lv2/helm.lv2/helm.so
#6  0x00007f673551a182 in start_thread (arg=0x7f66e5abf700) at pthread_create.c:312
#7  0x00007f6733f6c47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 2 (Thread 0x7f670649a700 (LWP 10799)):
#0  0x00007f6733f5f12d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f6738173fe4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f673817430a in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6738fe7d8b in BaseUI::main_thread (this=0xbbfa630) at ../libs/pbd/base_ui.cc:86
#4  0x00007f6738feb9c6 in sigc::bound_mem_functor0<void, BaseUI>::operator() (this=0xbbfaf58)
    at /usr/include/sigc++-2.0/sigc++/functors/mem_fun.h:1787
#5  0x00007f6738feb71a in sigc::adaptor_functor<sigc::bound_mem_functor0<void, BaseUI> >::operator() (this=0xbbfaf50)
    at /usr/include/sigc++-2.0/sigc++/adaptors/adaptor_trait.h:251
#6  0x00007f6738feb245 in sigc::internal::slot_call0<sigc::bound_mem_functor0<void, BaseUI>, void>::call_it (rep=0xbbfaf20)
    at /usr/include/sigc++-2.0/sigc++/functors/slot.h:103
#7  0x00007f67388cb11d in ?? () from /usr/lib/x86_64-linux-gnu/libglibmm-2.4.so.1
#8  0x00007f6738198f05 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#9  0x00007f673551a182 in start_thread (arg=0x7f670649a700) at pthread_create.c:312
#10 0x00007f6733f6c47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7f6705b45700 (LWP 10797)):
#0  0x00007f6733ea8cc9 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
#1  0x00007f6733eac0d8 in __GI_abort () at abort.c:89
#2  0x00007f67347b3535 in __gnu_cxx::__verbose_terminate_handler() () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#3  0x00007f67347b16d6 in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#4  0x00007f67347b1703 in std::terminate() () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#5  0x00007f67347b1922 in __cxa_throw () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#6  0x00007f67347b1e0d in operator new(unsigned long) () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#7  0x00007f67347b1ea9 in operator new[](unsigned long) () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#8  0x00007f66cfc53210 in synthv1_impl::alloc_sfxs(unsigned int) () from /usr/local/lib/lv2/synthv1.lv2/synthv1.so
#9  0x00007f66cfc5db88 in synthv1_impl::process(float**, float**, unsigned int) () from /usr/local/lib/lv2/synthv1.lv2/synthv1.so
#10 0x00007f66cfc61074 in synthv1_lv2::run(unsigned int) () from /usr/local/lib/lv2/synthv1.lv2/synthv1.so
#11 0x00007f673a5a1746 in lilv_instance_run (instance=0x1bcbe3c0, sample_count=64) at /usr/local/include/lilv-0/lilv/lilv.h:1662
#12 0x00007f673a5adadf in ARDOUR::LV2Plugin::run (this=0x1bce9e00, nframes=64) at ../libs/ardour/lv2_plugin.cc:2397
#13 0x00007f673a5acd30 in ARDOUR::LV2Plugin::connect_and_run (this=0x1bce9e00, bufs=..., in_map=..., out_map=..., nframes=64, offset=0)
    at ../libs/ardour/lv2_plugin.cc:2216
#14 0x00007f673a3b9899 in ARDOUR::PluginInsert::connect_and_run (this=0x1bc876a0, bufs=..., nframes=64, offset=0, with_auto=true, now=8127936)
    at ../libs/ardour/plugin_insert.cc:442
---Type <return> to continue, or q <return> to quit---
#15 0x00007f673a3ba353 in ARDOUR::PluginInsert::automation_run (this=0x1bc876a0, bufs=..., start=8127936, nframes=64)
    at ../libs/ardour/plugin_insert.cc:566
#16 0x00007f673a3ba05a in ARDOUR::PluginInsert::run (this=0x1bc876a0, bufs=..., start_frame=8127936, nframes=64)
    at ../libs/ardour/plugin_insert.cc:506
#17 0x00007f673a429946 in ARDOUR::Route::process_output_buffers (this=0x1af462f0, bufs=..., start_frame=8127936, end_frame=8128000, nframes=64, 
    declick=-1, gain_automation_ok=true) at ../libs/ardour/route.cc:632
#18 0x00007f673a34f28f in ARDOUR::MidiTrack::roll (this=0x1af462f0, nframes=64, start_frame=8127936, end_frame=8128000, declick=-1, 
    need_butler=@0x7f6705b449e0: false) at ../libs/ardour/midi_track.cc:454
#19 0x00007f673a4fdd96 in ARDOUR::Session::process_routes (this=0x4d926b0, nframes=64, need_butler=@0x7f6705b44a3a: true)
    at ../libs/ardour/session_process.cc:203
#20 0x00007f673a4feab1 in ARDOUR::Session::process_with_events (this=0x4d926b0, nframes=64) at ../libs/ardour/session_process.cc:432
#21 0x00007f673a4fd3f1 in ARDOUR::Session::process (this=0x4d926b0, nframes=1024) at ../libs/ardour/session_process.cc:76
#22 0x00007f673a14a6b7 in ARDOUR::AudioEngine::process_callback (this=0x357cda0, nframes=1024) at ../libs/ardour/audioengine.cc:374
#23 0x00007f672417e648 in ARDOUR::JACKAudioBackend::process_thread (this=0x37bbf80) at ../libs/backends/jack/jack_audiobackend.cc:967
#24 0x00007f672417e5d0 in ARDOUR::JACKAudioBackend::_process_thread (arg=0x37bbf80) at ../libs/backends/jack/jack_audiobackend.cc:944
#25 0x00007f6716bb27cb in Jack::JackClient::Execute() () from /usr/lib/libjack.so.0
#26 0x00007f6716bd1c1a in Jack::JackPosixThread::ThreadHandler(void*) () from /usr/lib/libjack.so.0
#27 0x00007f673551a182 in start_thread (arg=0x7f6705b45700) at pthread_create.c:312
#28 0x00007f6733f6c47d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111
(gdb)

vee one suite LV2 plugins: QT crash in REAPER ARM 64 bits and ubuntu 23.10 AMR 64 bits

Hi !
the standanlone version of the v1 suite synths work with JACK, but the QT windows hangs when the LV2 plugins are loaded in REAPER . audio engine still work, but impossible to close the QT window nor minimize it. i need to kill the REAPER app using SIGTERM 15.

raspberry pi 4 4GB with ubuntu 23.10 64 bits (aarch64)
libqt6 v6.4.2 for aarch64
REAPER v7.11 aarch64
v1 suite LV2 plugins build version 0.9.31-1 for aarch64

best regards
AM

Proposal for QApplication instance

When the code checks for QApplication, also check the arguments in order to see of this instance comes from the host, and not has been created by other Qt plugins. If that plugin (X) that created the QApplication will delete the instance of QApplication when user closes the window for X plugin, all the rest Qt plugins windows opened will crash.

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