BBDs was:Re: BassStation Filter: What is it?

[René Schmitz]

At 15:33 26.11.00 -0500, Harry Bissell wrote:

>For some things I prefer digital... like digital delay lines.  BTW I
consider the
>BBD a digital delay, albeit a Sh!tty one. The fact that it has an analog
range of
>oh... a couple volts in the Y axis does not cover up the sampled data
nature of
>the X axis....  so just saying analog does not mean good !

True that both are time discrete systems, in which the sampling theorem
must be obeyed, and that means no input frequencies above fs/2! Its this
input filter that 
is often neglected and leads to aliasing, and comments like BBDs are sh!t ;-)
But a DDL without proper input filtering will sound crappy too!!! 
My personal conclusion is that a BBD is fine for short delays of a few
msec, since only then you can use high enough sampling rates, and get
enough bandwidth. For anything longer a DDL should be used.

Bye,
 René



-- 
uzs159 at uni-bonn.de
http://www.uni-bonn.de/~uzs159