[sdiy] Switched capacitor filters

[Jim Credland]

Anyone done much work with these?  I got this far yesterday with an
MF10:
  
  http://voodooinsomnia.blogspot.co.uk/2012/12/mf10-switched-capacitor-filter.html

Mostly sounds good, but useless for a normal VCF as the clock starts to
creep in.  I also suspect, although I've not tested it, that if I used
it in an HPF configuration I'd start to hear aliasing at lower filter
frequencies.  

Now if I could get one that had a 20Mhz maximum clock speed...?  I've
seen versions that go up to 6Mhz or so. 

-- 
  Jim Credland
  jim at cernproductions.com