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dancasimiro / WAV.jl

Julia package for working with WAV files
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is there an option to read into a mono? #53

Closed EMCP closed 5 years ago

EMCP commented 6 years ago

I am working on porting a project that just analyzes the mono singles of audio samples..

Not sure how it was done in Python, but now trying to just get a working copy of my workflow into Julialang.. is there a quick way to indicate I want to read the wav into a mono?

Thanks for this library, I haven't found a lot of audio processing other than this library.

dancasimiro commented 6 years ago

Do you want the library to read one of the channels or mix all the channels together?

EMCP commented 6 years ago

I am attempting to measure the difference between an audio sample.. and another.

I think the mix would be the first choice since there could be panning being performed... For reference this is the project I'm porting.. I have a personal version in python3

https://github.com/kylemcdonald/AudioNotebooks

The particular call they perform is using FFMPEG.. I'd guess they'd mix

https://github.com/kylemcdonald/AudioNotebooks/blob/master/Collect%20Samples.ipynb

audio, _ = ffmpeg_load_audio(fn, sr, mono=True)

which then calls

https://github.com/kylemcdonald/AudioNotebooks/blob/master/utils/ffmpeg_load_audio.py

reading FFMPEG's docs doesn't really specify what happens if you pass -ac _ that is less than input channels

https://ffmpeg.org/ffmpeg.html