EH 16 second dly

[Ingo Debus]

Don Tillman wrote:
> (That's my abbreviated way of saying that most modern digital delay
> units are DSP-based with the delay process in software while the older
> digital delay units used some circuitry wrapped around a number of RAM
> chips or possibly even shift registers.  The difference really shows
> when you reach over and spin the delay knob.)

Do you mean with "delay process in software" that the delay time is set
with the offset between read and write addresses rather than with the
clock rate? This can be done with discrete logic too.

When the delay time is controlled by the clock rate only, the range
can't be very high. For short delay times high  clock rates are needed
and the ADC becomes very expensive. Is it really done this way in old
digital delays? What is the delay time range?

Ingo