[sdiy] Single chip digital delay

[Ryan Williams]

**hi,

I have just moved and don't have my workbench setup yet, but just before I
left I did a few quick tests with the pt2396. It was interesting enough so
that I will continue working with it. You can overclock this thing quite a
bit. It seemed to be working with clock frequencies at something like 15MHz
and maybe more ( I didn't measure ). the 12ms is what the datasheet
specifies for a 2MHz clock. So, I think it will allow a reasonable range for
modulation on any of the delay settings that are chosen with the 4-bit
binary input. running it with the fast clock should also allow a larger
bandwidth.

the test was real quick. I was using the VCO from a pt2399. I did not check
sound quality or anything like that. I would think that the capacitors in
the modulator/demodulator might need some adjusting if clocking this fast.

-ryan

On 1/24/06, Andre Majorel <amajorel at teaser.fr> wrote:

> There's Ryan Williams' VC-echo based on the PT239x :
>
>   http://www.sdiy.org/destrukto/vc-echo.html
>
> Ryan says the PT2396 can go down to 12 ms. But for realistic
> stereo placement, you want 0.5 ms or less.
>
> --
> André Majorel <amajorel at teaser.fr>
> http://www.teaser.fr/~amajorel/
>
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