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Subject: Re: Delay Module

From: "paulhaneberg" <phaneber@...>
Date: 2002-02-27

24 bit would certainly have improved sonic quality over 16 bit, but I
think you could probably get a bigger variation in clock speeds with a
16 bit. If the converter is less complex the actual conversion would
be quicker assuming a succesive-approximation type converter. I don't
know what the highest number of bits available in a flash converter
is, but presumably this could be clocked at higher speeds (up into the
MHz range) There are 24 bit converters available that can convert at
192 kHz, but cost is an issue. Another possibility is to use a
one-bit converter at even higher clock speeds.
I would definitely use a filter at a low fixed frequency like 20kHz.
One of the pitfalls of this module ideas is that in order to be truly
musically useful the voltage to frequency conversion for the clock
must be very accurate over a wide range. I'm not sure how possible
that is in the MHz region.
Multiple taps are easily implemented. A range of delay times from
very short to reasonably long could be available. This is simply a
function of the amount of RAM.
Even 12 bits would probably be an improvement over an analog delay.
I think a module of this sort would be very useful and popular as long
as the cost was not too high.
At some point I will probably try to build this thing and find out.