Re: audio recording is fast

[Kenneth Dombrowski <kenneth@ylayali.net>]

Thanks for replying, Steve. I'm still totally stumped on this

Steve Juranich wrote:
> On Sun, 29 Dec 2002 21:03:09 -0500, Kenneth Dombrowski wrote:
> > it sounds like a 33rpm record playing at 78-or 100-rpms. I tried using
>
> Offhand, it sounds like a sampling rate issue.  You need to make sure
> that the recording sampling rate matches your playback sampling rate. 
> FYI, the sampling rate for CD quality audio is 44.1 kHz.  This should be
> the default recording sampling rate for audacity.  I've never heard of
> gramofile.

Yeah, this is the first thing I thought of, but everything is set for 
44.1. I tried:

 - recording & immediate playback in audacity without saving the file
   (though some .auf files are written to ~/.audacity_temp)

 - recording to .wav, processing and playing in gramofile (gramofile
   applies filters to tracks recorded from casettes/LPs to reduce
   noise), and

 - saving either of these files & opening in xmms

Playback is always 3 or 4X the original speed

I did install speech-tools to check one of the files itself, and ch_wave 
reports this:

kenneth@enlil:/mp3/tmp$ ch_wave -info new-processed.wav
Duration: 14.9000
Sample rate: 44100
Number of samples: 657091
Number of channels: 2
Header type: riff
Data type: short

 ..which looks ok to me. at least it does appear to have the correct 
header & verifies the sample rate.

tracks recorded from a CD play back at the correct speed. what's really 
puzzling is that it _did_ work fine for a week or so... up until the 
26th when I did an upgrade & installed some new sound editing apps. I've 
been purging the new stuff I installed one by one, but without results 
so far..

Any ideas still appreciated,
Kenneth