string filter bank (was: Re: [sdiy] 40-band vocorder)

[Tom Wiltshire]

On 3 Apr 2009, at 02:17, Andrew Simper wrote:

> Would it be any good to use a few short bbd chips, using two for a  
> bi-directional delay line with feedback to get a large number of  
> peaks? These peaks could then be generally shaped to the right  
> spectrum with a few eq filters, and the bottom 5 or so resonances  
> could be modeled with individual filters. I have no idea of what  
> spacing you need it in the upper frequencies for a good analog  
> string filter, so I'm happy to learn that a vast number of finely  
> tuned filters is the only way to really do it.
>
> Andrew Simper
>

Andrew,

Others might disagree, but my own view is that the peaks introduced  
by a short BBD delay have a very distinctive sound which is nothing  
like anything I'd call a string filter. Instead, the sound is much  
more akin to that you get when shouting down a long tube or pipe.  
Particularly a metal pipe. This sound is a flanger with the LFO  
disconnected, and it's not a great sound, IMO.

So I'd be very surprised if this were a useful approach, but I'm only  
too willing to be proved wrong if you can make it work.

Regards,
Tom