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Date:	Sun, 28 Aug 2005 12:24:36 PDT7
From:	Peter Skye <pskye@peterskye.com >
Reply-To:	scoug-help@scoug.com
To:	scoug-help@scoug.com
Subject:	SCOUG-Help: Tom Brown: WAV file parsing & editing

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Tom,

You emailed me privately with your WAV question and so I responded
privately, but your ISP rejected my message. So it ain't "private" any
more 'cause I'm posting it here.

Delayed getting to San Diego due to a computer failure but I'm leaving
soon, back on Wednesday.

- Peter

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Message-ID: <43114018.3E4@peterskye.com>
Date: Sat, 27 Aug 2005 21:39:52 -0700
From: Peter Skye
X-Mailer: Mozilla 2.02 (OS/2; I)
MIME-Version: 1.0
To: Tom Brown
Subject: Re: WAV file parsing & editing
References: <4310A9E6.3020602@san.rr.com>
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Tom Brown wrote:
>
> I am trying to parse .wav files recorded from
> cassette tape into tracks for recording onto CDs.

I don't think you mean "parse". That word refers to individual units of
data, such as each parameter on a command line or the individual words
and operators on each line of a program's source code.

Audio cassette tapes are recorded (although most people don't know this)
by converting the audio to an AM radio station signal and then
"broadcasting" it through the cassette machine's "record head" as if the
"record head" were an antenna. The radio signals then magnetize the
ferric oxide (or whatever) on the tape as it slides over the "antenna".

Not that the above has anything whatsoever to do with what you're trying
to accomplish . . .

> I found an OS/2 program called WaWE which works
> very slowly 10-15 min to write a 200 MB file on my SMP Athlon 2200+) and
> is somewhat clumsy. Do you know of a good program that will parse a .wav
> file from one side of a cassette or LP into separate .wav files for each
> track?

By "track", do you mean the two stereo tracks?

You probably already have your cassette player or turntable preamplifier
connecte via stereo cable to your sound card, yes? (You *must* use a
preamp on the turntable because the turntable pickup only puts out a
millivolt or so and the sound card needs about 100 millivolts, _plus_
there's a major tonal shift called the RIAA curve which again most
people know nothing about but without the preamp your phonograph will
sound very tinny.)

Try DTape, DPlay/DRecord (VIO versions) by Paul Ratcliffe.

http://home.clara.net/orac/os2.htm

Tom, I'm out of town from later this evening through Tuesday (San Diego
again). If you need more help just holler back and I'll reply when I
get back in town. Or you can post to the SCOUG-Help list 'cause I
monitor that too.
_____

Oops. By chance, are you trying to split the individual selections
where the silences occur? It doesn't appear that's your question but
maybe it is. I think SoX can do this, or perhaps RxWav (a
write-your-own library), or you can try Riffler which I haven't used.
All are on Hobbes. I have a very long list of OS/2 audio software if
you need a bigger selection.

SoX is a sound file format converter:

http://www.spies.com/Sox/
http://hobbes.nmsu.edu/pub/os2/apps/mmedia/sound/convert/sox*
http://sox.sourceforge.net/

Riffler (on Hobbes) splits, joins, clips, fixes and displays header info
for .wav files.

- Peter

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