Originally Posted by drbob1
Apparently a delay sold as Coron (and Asama and a bunch of others) used this as well. It was called something 500, so I wonder if it allowed for 500 msec.
By a HF rolloff you mean that there was internal circuitry to handle the change in roll-off required with slower clock speeds (it's done in some delays, including at least one DOD, so that longer delays are more pristine, using external circuitry).
The 5101 had a HF roll-off in the unprocessed output related to the clock rate that occurred well above sampling related aliasing occurred. So listening to the 5101 wide band would exhibit HF loss as clock frequency dropped while still well higher than aliasing artifacts were audible.
It was a nice part because you could get wide bandwidth for short delays, and the reduced bandwidth longer delays from the same path without switching in multiple filters or using more complex filters that varied with the clock frequency.