VSTs doing nothing

[ggenesum]

Hello,

Im trying to add reverb to an audio file using a vst plugin. Ive tried fabfitler and many other vst2/vst3 plugins I have. However, when I listen to the ouput.wav file, i hear the playback unchanged, with no reverb. When I display the plugin GUI, i can see the aggressive settings I should easily be able to hear if they were applied.

import dawdreamer as daw
import numpy as np
import random
from scipy.io import wavfile
import librosa

def load_audio_file(file_path: str, duration=None):

    file_path = str(file_path)

    sig, rate = librosa.load(file_path, duration=duration, mono=False, sr=SAMPLE_RATE)
    assert(rate == SAMPLE_RATE)

    return sig

DURATION = 120.

SAMPLE_RATE = 44100

engine = daw.RenderEngine(SAMPLE_RATE, 512)  # 512 block size
data = load_audio_file("edge.wav", DURATION+.1)
# Create a Playback Processor
playback_processor = engine.make_playback_processor("playback", data)

vst3_processor_proR = engine.make_plugin_processor("Pro-R", "C:\Program Files\Common Files\VST3\FabFilter\FabFilter Pro-R.vst3")

num_params = vst3_processor_proR.get_plugin_parameter_size()
for i in range(num_params):
    param_name = vst3_processor_proR.get_parameter_name(i)
    if param_name == "Mix":
        vst3_processor_proR.set_parameter(i, 1) #random.uniform(0, 0.4)
    else:
        vst3_processor_proR.set_parameter(i, random.uniform(0, 1))
print(vst3_processor_proR.get_parameters_description())
vst3_processor_proR.open_editor()
vst3_processor_proR.record = True

duration = 120.
# Load the processors into the render engine
engine.load_graph([
        (playback_processor, []),
        (vst3_processor_proR, ["playback"])
    ])

engine.render(duration)

output = vst3_processor_proR.get_audio()

wavfile.write("output.wav", SAMPLE_RATE, output.transpose())

# Get the processed audio data
processed_audio = engine.get_audio()

[ggenesum]

Is there a free VST that have been tested on windows i can use to test this code ?

[DBraun]

Can you try this plugin: https://github.com/DBraun/DawDreamer/blob/main/tests/plugins/Dimension%20Expander_x64.dll

Maybe you can test one parameter at a time rather than using random.uniform? That would be more reproducible and helpful for me.

Maybe it’s an issue of DawDreamer 0.6.15? Could you try 0.6.14? I’ll try it later today.

[ggenesum]

You were right, the random parameters where causing the reverb to be bypassed. I did not know fabfilter pro-R as a bypass as it is not shown in their interface.

elif not 'input' in param_name and not 'output' in param_name and param_name != 'Bypass' and param_name != 'Host Bypass':

fabfilter Pro-R is working perfectly with DAWDreamer on Windows.

[ggenesum]

Fabfilter Pro-Q is working on windows

[DBraun]

Great! Is there a remaining issue?

[DBraun]

Closing, please re-open if an issue persists.