Audio Delay Circuit

[Michael A. Terrell]

bias, erase would be a significant challenge. Nice idea though

martin

The "Echoplex" was a tube based echo unit for musicians in the '60s:
<http://www.loopers-delight.com/tools/oldechoplex/tape_echoplex_schem.html>

 

[Pooh Bear]

The "Echoplex" was a tube based echo unit for musicians in the '60s:
<http://www.loopers-delight.com/tools/oldechoplex/tape_echoplex_schem.html>

ISTR getting one of those to service once. And a Binson Echorec too.

Graham

 

[John Fields]

This one?
http://www.eetchina.com/ARTICLES/2003AUG/PDF/2003AUG29_AMD_AN02.PDF

Thanks, but Mouser, Digi-key, and Newark come up 0, and the one source
that lists the chip (MX609P) is one of those "Register and give us your
personal information before we'll tell you how much it is" sites.

Where do you buy yours?

 

[Rich Grise]

I don't, but if I did I'd start with TI and Freescale.

That's two more zeros.

Apparently you can get them from surplus dealers, if you submit a(an?)
RFQ.

Glad I'm not trying to build this thing.

Thanks,
Rich

 

[Jim Thompson]

On Fri, 14 Oct 2005 16:44:20 -0700, Jim Thompson

[snip]

3.75ips, for 5 second delay, would only be ~6 inches in diameter,
rotating at 12rpm ;-)

Maybe you could slow down a hard-drive ?

...Jim Thompson

In fact, couldn't you do this with a hard-drive? Isn't this the same
thing as TIVO (DVR) but just audio?

...Jim Thompson

 

[Michael A. Terrell]

ISTR getting one of those to service once. And a Binson Echorec too.

Graham

I repaired a bunch of them in the '70s, both tube and solid state.

 

[Pooh Bear]

On Fri, 14 Oct 2005 16:44:20 -0700, Jim Thompson

[snip]

3.75ips, for 5 second delay, would only be ~6 inches in diameter,
rotating at 12rpm ;-)

Maybe you could slow down a hard-drive ?

...Jim Thompson

In fact, couldn't you do this with a hard-drive? Isn't this the same
thing as TIVO (DVR) but just audio?

With a modern drive you could probably have a 7 *day* delay !

Graham

 

[John Fields]

That's two more zeros.

Apparently you can get them from surplus dealers, if you submit a(an?)
RFQ.

 

[Rich Grise]

On Fri, 14 Oct 2005 16:44:20 -0700, Jim Thompson

[snip]

3.75ips, for 5 second delay, would only be ~6 inches in diameter,
rotating at 12rpm ;-)

Maybe you could slow down a hard-drive ?

In fact, couldn't you do this with a hard-drive? Isn't this the same
thing as TIVO (DVR) but just audio?

You'd have to add another head carriage, and I'd think it'd be
a bitch to align it with the original, but then again, they
might get their servo signals from the read head itself - in
the old 14" 10-platters-for-300 MB drives, they had a whole
nother head to read the servo tracks.

And yeah, if all you're doing is audio, you could probably
spin it at about 4 RPM, with today's heads.

Cheers!
Rich

 

[Keith Williams]

On Fri, 14 Oct 2005 16:44:20 -0700, Jim Thompson

[snip]

3.75ips, for 5 second delay, would only be ~6 inches in diameter,
rotating at 12rpm ;-)

Maybe you could slow down a hard-drive ?

...Jim Thompson

In fact, couldn't you do this with a hard-drive? Isn't this the same
thing as TIVO (DVR) but just audio?

With a modern drive you could probably have a 7 *day* delay !

A month or two?

250E9 bytes/(44Ksamples/S * 2bytes/sample * 3600sec/hr * 24hrs/day)
= 33 days

 

[Keith Williams]

On Fri, 14 Oct 2005 16:44:20 -0700, Jim Thompson

[snip]

3.75ips, for 5 second delay, would only be ~6 inches in diameter,
rotating at 12rpm ;-)

Maybe you could slow down a hard-drive ?

In fact, couldn't you do this with a hard-drive? Isn't this the same
thing as TIVO (DVR) but just audio?

You'd have to add another head carriage, and I'd think it'd be
a bitch to align it with the original, but then again, they
might get their servo signals from the read head itself - in
the old 14" 10-platters-for-300 MB drives, they had a whole
nother head to read the servo tracks.

Why go to all this bother? Tivo works wit cheap IDE drives. FIFO
the data at both ends and let the drive do its thing.

And yeah, if all you're doing is audio, you could probably
spin it at about 4 RPM, with today's heads.

How are you going to extract the clock and servo data at that
speed?