ulmert / polly

A MIDI proxy sketch for the Midiboy (Arduino) platform - enabling a Korg Volca Sample 2 to be used as a polyphonic (and multitimbral) sample player (when combined with a MIDI keyboard / controller)

Polly

A MIDI proxy sketch for the Midiboy (Arduino) platform - enabling a Korg Volca Sample 2 to be used as a polyphonic (and multitimbral) sample player (when combined with a MIDI keyboard / controller).

Supports up to 9 channels, either separate, layered or grouped. In addition to pitch, control changes such as sample selection, lo-cut, pan and reverb can be mapped in a variety of ways.

The Volca Sample 2 must be configured to run in (midi) multi-channel mode.
When active channels exceeds 6-7 sometimes an audible click can be heard upon sample playback.

Note: If a parameter is configured to be off (e.g. velocity) then no control change will be transmitted. Setting release time will trigger a control value of 127 (hold) upon note on events and the configured release time on note off - this enables sample duration to be controlled by key / note duration.

Channels (1-9)

Input

Key(s)	Action
B	Next page
A	As indicated on the screen
U/D/L/R	Move between parameters / Change parameter value

Settings

Parameter	Description
MIDI	Listen channel (ALL, 1 - 16)
NSTEAL	Enable note stealing (OFF / ON)
LOWER	Lower range key mapping
UPPER	Upper range key mapping
OFFSET	Amount to offset notes played
REL	Release time triggered by a note off event (OFF, 1 - 127)
VEL	Velocity control (OFF, RANDOM, KEYPRESS)
VELMIN	Minimum velocity
VELMAX	Maximum velocity (velocity will be scaled within this range)
VELINV	Invert the velocity (OFF / ON)
CUT	Lo-cut control (OFF, RANDOM, KEYPRESS)
CUTMIN	Minimum lo-cut
CUTMAX	Maximum lo-cut (lo-cut will be scaled within this range)
GROUP	Channel is assigned to a group (1-4) Note; A channel assigned to a group will have MIDI and Note stealing overriden by the group settings

Groups (1-4)

Input

Key(s)	Action
B	Next page
U/D/L/R	Move between parameters / Change parameter value

Settings

Parameter	Description
MIDI	Listen channel (ALL, 1 - 16)
NSTEAL	Enable note stealing (OFF / ON)
SMODE	Sample selection mode (OFF, RANDOM, KEYPRESS, CYCLE)
SMPL 1	Sample number (OFF, 1 - 200)
SMPL 2	Sample number (OFF, 1 - 200)
SMPL 3	Sample number (OFF, 1 - 200)
SMPL 4	Sample number (OFF, 1 - 200)
RVRB 1	Reverb setting (OFF, ENABLE, DISABLE, RANDOM)
RVRB 2	Reverb setting (OFF, ENABLE, DISABLE, RANDOM)
RVRB 3	Reverb setting (OFF, ENABLE, DISABLE, RANDOM)
RVRB 4	Reverb setting (OFF, ENABLE, DISABLE, RANDOM)
PAN	Ping-pong panning width (OFF, 1 - 4)

Sample select (using any of the 4 enabled sample slots) will only be send if selection mode is set (RANDOM, KEYPRESS or CYCLE). When KEYPRESS is selected, the note velocity will determine which of the (sample number) slots to use. Also note that each sample slot is mapped to corresponding reverb slot.

MIDI Buffer Monitor

Input

Key(s)	Action
B	Next page
A	Reset active notes

Save / Load

Input

Key(s)	Action
B	Next page
U/D	Move between save slots
L/R	Hold to save / Hold to load

Short demonstration