Does anyone know of any utilities that could automate the conversion of a stereo audio file to mono? Preferably, something that watches a folder and just runs on new audio files saved to that folder.
You can do it with Python.
from pydub import AudioSegment
sound = AudioSegment.from_wav("stereo.wav")
sound = sound.set_channels(1)
sound.export("mono.wav", format="wav")
That will convert stereo to mono. You can probably use it as a script in for example Hazel.
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Alternative option could be ffmpeg.
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Ended up going with this FFMPEG option, as you have to install that anyway to get the Python solution to work. Created a little automator workflow with it. Thanks!
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