Subject: Re: [linux-audio-dev] Vsound-like tools for ALSA?
From: Lance Blisters (geoff_AT_drachma.ugcs.caltech.edu)
Date: Wed Jan 28 2004 - 17:46:38 EET
> > > Quite how you determine the format of the .raw file is beyond me -
> > > anybody?!
>
> .raw files don't have any header, so you have to guess. (The sample
> format is almost always S16_LE, but for the number of channels (mostly
> 1 or 2) or the sample rate, you have to try until it doesn't sound too
> bad. ;-)
I've also wished for a tool which analyzed raw audio data. Shouldn't
be too difficult to try all common formats (word size, signed/unsigned,
big/little endian) and measure average volume and continuity to determine
which formats yield a reasonable waveform. Tool might fail on samples
of white noise, but should easily succeed in 99% of cases. The tool could
even try different bit/byte alignments (skipping 0,1,2,...15 bits at
the beginning), to recover fragments of files which might not start at
an even sample. Number of channels and sampling rate might need to be
tuned by hand, but that's a simple matter once the other parameters
are correct.
Surely this must exist, maybe in the windows or mac universe?
-geoff
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