new here plus a question...

[Bram de Jong]

On Thu, 18 Jan 2001, Martin Czech wrote:
<snip>
> Discrete systems have limited bandwith (Nyquist etc.)  Analog systems
> tend to have wide bandwidth. Therefore some warping hase to be made. This
> will destroy phase characteristics.  So the bilinear mapping does not
> even work if there would be no nonlinear distortions, unless you use
> pretty high internal sampling rate.

Yeah, bilinear + warping was what I was thinking...

<large snip ;)>

Well, I wasn't talking about modeling any of the non-linearities!
I just want to figure out how to convert these schematics to their digital
form. I mean, if I'm right then these are just *filters*, right? Yes,
they'd probbably have non-linear R's and C's and L's, but that's not what
I'm tying to do right now :)

I know all about the problems you encounter with digital audio, but there
are some ways to batle them (like N-fold oversampling...) which can easily
be done in NON-realtime software (realtime play @ low quality, render @
high quality!).

So, ... where do I find a good reference (book?) on "Analog to digital
filter design".


cheers,


Bram.