Assuming you recorded your voice message on a tape recorder and played it
back at half the speed, it would take twice the time to send the message.
So we would be using half the bandwidth but twice the time. So the bands
would in effect be just as crowded. You could get twice as many stations on
a particular band but everybody would need to talk twice as long. You would
not gain anything and you definitly could not talk in "real" time.
Carl Moreschi N4PY
Franklinton, NC
----- Original Message -----
From: "Mark Erbaugh" <mark@microenh.com>
To: <tentec@contesting.com>
Sent: Tuesday, April 22, 2003 8:45 PM
Subject: Re: [TenTec] Slightly OT: SSB vs AM
> How do the circuits they use on TV to keep the audio pitch the same when
> they speed up the tape work? I know they do that so that can shorten the
> program and squeeze in more commercials. I remember watching a show once
and
> after a commercial break, they didn't reengage the circuit and everybody
was
> Alvin the chipmunk.
>
> At any rate, suppose you played the audio twice as fast, but used a
similar
> circuit to restore the original pitch. Then you took that processed audio
> and played it at half speed, this time with no pitch correction. Wouldn't
> that compress each frequency to half it's original value?
>
>
> 73,
> Mark
>
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