On 9/1/05, wb9kzy@arrl.net <jacksonharbor1@att.net> wrote:
> Fellows and Gals -
> 
> While googling on: "5 second delay" nfl network tv "local radio"
> (the delay between the network TV broadcast of a football game and
> the local radio is irritating, like always knowing the future but
> only 5 seconds of the future), I noticed the following:
> 
>   <http://delayplayradio.com>
> 
> It seems a little expensive to me, I suppose a tape
> loop of 5 seconds would be possible but I was thinking of
> a simple chip solution, maybe two Winbond (used to be ISD)
> voice recorder chips and a PIC.  Start recording
> with one of the chips and after 5 seconds, switch
> to recording with the other chip while changing
> the first chip into playback mode.  From then
> on just switch between the two.
> 
> Any other ideas ?
> 
> Best Regards,
> 
> Chuck Olson

For less money (and better resale value), buy a "delay" guitar stomp-box.

The general solution is a PCM codec and a circular buffer in RAM.  If
you sample at 8kHz (voice quality) and 16 bits, that's 8e3*2*5=80K of
RAM required.  You could probably do this with a PIC, an external
SRAM, and a
PCM codec.

It would also be rather trivial to do this with a shell script or
simple program on a computer.

Regards,
Mark
markrages@gmail
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