How would I make a synth? about dawdreamer

[DBraun]

It sounds like polyphony is not enabled for the synthesizer. Is it a VST plugin? Which one? You might need to use synth.open_editor() to enable polyphony. Faust Processors have a num_voices integer parameter.

[Conundroy]

It sounds like polyphony is not enabled for the synthesizer. Is it a VST plugin? Which one? You might need to use synth.open_editor() to enable polyphony. Faust Processors have a num_voices integer parameter.

Any VST, the test one I'm using is TAL-BassLine piped through a plugin processor. Does the editor have to stay on?

[DBraun]

Can you try code like this

import dawdreamer as daw
from scipy.io import wavfile

PLUGIN_PATH="plugins/TAL-NoiseMaker.vst"
OUTPUT_PATH="my_output.wav"
SAMPLE_RATE=44100
DURATION = 10.
BLOCK_SIZE=128

engine = daw.RenderEngine(SAMPLE_RATE, BLOCK_SIZE)

synth = engine.make_plugin_processor("synth", PLUGIN_PATH)
synth.open_editor()

# Test polyphony with 3 overlapping notes
# (MIDI note, velocity, start sec, duration sec)
synth.add_midi_note(72, 40, 0.1, 5)
synth.add_midi_note(76, 40, 1.1, 3)
synth.add_midi_note(79, 40, 2.1, 1)

graph = [(synth, [])]

engine.load_graph(graph)
engine.render(DURATION)
audio = engine.get_audio()

wavfile.write(OUTPUT_PATH, SAMPLE_RATE, audio.transpose())

When the synth UI opens you'd have to make sure polyphony is enabled. On macos, I'm using theTAL-NoiseMaker.vst in the plugins folder and if I enable polyphony it's working correctly.

[Conundroy]

I managed to have polyphony now. But what I want is a synth with real time render essentially. From what I read, I don't think I can achieve this with the current version of Dawdreamer just yet. Or maybe there's something I'm missing?

[DBraun]

Right. It’s not a feature currently.