Batch convert mono WAV to stereo verbatim

3

I have a bunch mono .wav files which I need to convert to stereo in order to run thru lame. Lame can't encode stereo mp3s from mono input so that's what I need to do.

I don't need any modifications to the data made other than duplicating channel into two.

I've tried to use sox and it seems to alter sound data in eerie ways by up-downsampling and changing bit depths in between as well as running filters I don't need.

So please recommend me some tool to batch convert .wav files from mono to stereo. I'm on linux.

alamar

Posted 2013-11-30T11:30:44.090

Reputation: 137

Answers

4

sox input.wav output.wav channels 2

Ignacio Vazquez-Abrams

Posted 2013-11-30T11:30:44.090

Reputation: 100 516

sox doesn't do verbatim conversion, it applies numerous transforms and filters (in your case, for example, dither - look up -D; but god knows what else) – alamar – 2013-11-30T12:00:28.023

Uh, no. With only channels it either duplicates or downmixes unless the format has to be changed for some reason. $ sox -V ... sox INFO sox: effects chain: input 48000Hz 1 channels sox INFO sox: effects chain: channels 48000Hz 2 channels sox INFO sox: effects chain: output 48000Hz 2 channels – Ignacio Vazquez-Abrams – 2013-11-30T12:02:38.380

Asked: 2013-11-30T11:30:44.090

Viewed: 1 989 times

Active: 2013-11-30T11:34:36.590