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

[Andrew Simper]

So are the frequencies log spaced in a band pass type string filter?

With the bbd delay lines I was thinking more along the lines of an 
analog waveguide with filters and the bbds arranged in a rough grid to 
approximate the shape of a bass / cello / viola / violin and you could 
adjust the clock signal to change the size of the body resonances. This 
stuff is probably more easily done in digital I suppose, but there is 
something cool I think about having a grid of cheap and short bbds 
clocked at variable rate all joined together physically making the grid 
shape of the body of a violin.

Andrew Simper

JH. wrote:
>> 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.
>>     
>
> It's because all the resonances are perfectly "in tune" and lock, or don't 
> lock, on all the harmonics of an input signal at the same time.
>
> JH.
>
>