serum vst parameter changed in ui but was not applied

[PabloZimmermann]

Hi, first of all, thanks for this amazing library!

The set_parameter updated successfully the UI but the effect is not applied to the audio.

@DBraun reported something similar a while ago #149 (comment)

but he said that the issue was due to "having a MIDI note longer than my record duration..." i don't see how this applies to my case, or does it? help!

my env:
mac m1
sonoma 14.4.1
Python 3.10.10
dawdreamer: 0.8.0

A) testing the effect with a preset that uses the set_parameter to activate the phaser effect

code:

from IPython.display import Audio
import dawdreamer as daw

SAMPLE_RATE = 44100
BUFFER_SIZE = 512
SERUM_PATH = "/Library/Audio/Plug-Ins/vst/Serum.vst"
PRESET_WITHOUT_EFFECTS = "presets/preset_1_no_phaser.fxp"
engine = daw.RenderEngine(SAMPLE_RATE, BUFFER_SIZE)
serum = engine.make_plugin_processor("serum", SERUM_PATH)
serum.load_preset(PRESET_WITHOUT_EFFECTS)
serum.set_parameter(156,1) # enable the phaser
serum.set_parameter(111,1) # rate to max, to make the effect very evident! wet is already 1.0 by default.
serum.open_editor() # VERIFY THAT THE EFFECTS DID CHANGE CORRECTLY IN THE UI
serum.add_midi_note(60, 100, 0.1, 0.5, beats=True) # CREATE A ONE SHOT NOTE
engine.load_graph([(serum, [])])
engine.render(5)
audio = engine.get_audio()
Audio(audio, rate=SAMPLE_RATE) 

B) testing the effect with a preset that already has the effect applied and the set_parameter is not used:

SAMPLE_RATE = 44100
BUFFER_SIZE = 512
SERUM_PATH = "/Library/Audio/Plug-Ins/vst/Serum.vst"
PRESET_WITH_EFFECTS = "presets/preset_2_with_phaser.fxp"
engine = daw.RenderEngine(SAMPLE_RATE, BUFFER_SIZE)
serum = engine.make_plugin_processor("serum", SERUM_PATH)
serum.load_preset(PRESET_WITH_EFFECTS)
serum.open_editor() # VERIFY  THE EFFECTS IS ENABLED
serum.add_midi_note(60, 100, 0.1, 0.5, beats=True) # CREATE A ONE SHOT NOTE
engine.load_graph([(serum, [])])
engine.render(5)
audio = engine.get_audio()
Audio(audio, rate=SAMPLE_RATE) 

RESULT: as expected the effect is successfully audible