WAV Sample Size & Rate - Detection & Resampling

2008-11-22 02:16:10

I run a music label group and we're developing a site where our label managers can upload their master recordings. We deal with WAV files--I know, not the ideal format.

The issue I have is that we need all our WAVs to be 44.100khz/16Bit-- and sometimes the artists don't send the right type. We're going to have our site try to detect the sample size & sample rate, and if its not correct, re-sample the WAV.

Does anyone have any suggestions for a *nix command line app that can do this? We currently use LAME to encode all our WAVs to mp3, but it looks like the -decode option there is only for decoding an MP3->WAV, not a WAV->WAV.

Any leads would be appreciated, thanks!

WAV Sample Size & Rate - Detection & Resampling

Reply #1 – 2008-11-22 06:15:18

There are several: SoX, SSRC & sndfile-resample spring to mind.  SoX (and I think sndfile-resample) comes with a utility to query the existing bit depth and sample rate which you could use in a script.
If you're reducing bit-depth, you also need to dither/noise-shape; both SoX and SSRC support this.

  -bandpass

WAV Sample Size & Rate - Detection & Resampling

Reply #2 – 2008-11-22 08:57:01

Thank you bandpass, that is extremely helpful. I really appreciate your expertise. I will look into these next week as we tackle the problem.