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MathGroup Archive 1996

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Re: [Q] How to read (and analyze) .WAV files?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg5097] Re: [mg5012] [Q] How to read (and analyze) .WAV files?
  • From: Mark Evans <evans at sm1.gte.net>
  • Date: Wed, 30 Oct 1996 22:03:45 -0500
  • Organization: None
  • Sender: owner-wri-mathgroup at wolfram.com

Hi Carlos -

I have the same problem.  The closest thing to a solution is the package 
Miscellaneous`Audio` which has a routine called ReadSoundfile[].  this 
routine can handle WAV files.  As I just said in a recent post to this 
newsgroup, this package has a bug.  It will not read 16-bit WAV files, so 
you must convert to 8-bit format or fix the bug yourself.  I have not made 
the attempt yet.  It also has the fundamental flaw of being terribly slow.  
You'll wait about a minute or two to load in a ten-second sound file.

I was going to try the FastBinaryFiles package by Todd Gayley, but I've had 
some problems getting it going under Mathematica 3.0

Mathematica 3.0 has a sound input/output utility that reads, writes, and 
modifies WAV files, BUT DOES NOT DO THE MOST IMPORTANT STEP OF ALL, which is 
to get the data into Mathematica as a list of numbers!  How frustrating!

If there is a way to get the data out of this utility and into the kernel, I 
hope someone will tell me about it.  I've not been using 3.0 very long so 
there may be something I missed.  I did try a lot of variations of 
copy/paste.  The sound utility would only paste the sound as an embedded 
object.

Mark Evans
evans at gte.net


Carlos Wexler wrote:
> 
> Hello,
> 
> I would like to analyze some audio stuff that I've recorded with my sound
> card. The data is recorded in either mono or stereo, either 8 or 16 bits
> per point, and either 8,11,22 or 44 ksps. The programs I have can record
> into .WAV files but I don't know how to read them from Mathematica. Any
> clues?
> 
> Thanks!
> 
> Carlos
> 
> --



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