[sdiy] Switched cap filters

[Michael Bacich]

On Oct 13, 2006, at 12:36 AM, Tom Arnold wrote:

> I'm not a fan of the LMF100 however for some applications switched cap
> filters are pretty nifty.  Specifically analog delays.  a switched cap
> filter lets you adjust your anti-alias filter on your BBD based  
> delay so
> that it properly tracks the BBD clock itself.  Of course this can  
> also be
> used on low-memory digital delays and in fact I first got enamored  
> with the
> idea of Switched Cap Filters was when I was looking at the EH16 delay.

The Akai S900 sampler also used switched cap filters for anti- 
aliasing that follow the sample clock -- one for each of its eight  
voices.  It has been rumoured that the early Akai samplers (S612,  
X7000, S900, etc.) were based on technology that they licensed from  
Electro-Harmonix -- specifically, the 16 Second Delay.

Mike B.