[sdiy] website update - VC-Delay

[mark verbos]

Then why not roll your own from some RAM? I am working on something like 
that now, will be a while before I test it out though. I did buy 500 
4164 RAM chips though!

Mark


Nils Pipenbrinck wrote:

> Ryan Williams wrote:
>
>> I've just got my VC-Echo/Delay module finished. well not in a front 
>> panel yet but its working properly. This circuit uses the PT2395. 
>> check the page for more info, schematics, sound and a bad picture:
>>
>
> I always have an open eye for these PT23xx delay circuits. The minimal 
> delay time is a problem for me though. I'm not interested in delay but 
> modulation (chorus, flanging and the like).
>
> Ryan's circuit made me think.... I doubt that the delay chip does any 
> complicated acesses to the ram: Most probably it just alternates 
> between write a byte and read a byte.. maybe even with a fixed address 
> offset or no offset at all.
>
> If we would ignore the internal address-logic of the chip and roll our 
> own we could make the delay time as small as we would like to, right? 
> Can't be that complicated. I doubt we'll need much more than some 
> counters and a binary adder.
>
> So, does anyone knows the ram access pattern of the PT2395?
>  Nils
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