Hi there Ken,
been a while I know - and remote viewer of the forums - but thought
I'd let you know I finally got round to getting the bandpass and
matrix boards up and running with no probs (bar the everyday
distractions and sorting out a power supply) and it's all good : )
trying to get my head round doing some tests (and then maybe some
mods). I'd like to suss the slope and 'Q' out and think I'm on the
right track, but was wondering, if I'm not totally lost, can you
confirm the CGS is a '2nd order' filter?
From reading up a bit about these kind of state variable filters
(yours is essentially one o' these right?), I'm a bit foxed on
whether I should get the slope of 16 or 20dB that I seem to be
reading from my frequency plots. D'you know if that's about right? or
is it more like 12dB and I just can't read a bode plotter right :?
Q looks about 6 by my reckoning - does that sound about right?
Any suggestions on how to figured these if I'm a country mile out
would be gratefully recieved
Thanks in advance
Al
p.s. having admired it all from a far for years, now I'm hooked -
thou the family think I'm gone mad :) - ! I'm enjoying finally
getting my hands dirty - a convert to the cause, who knows maybe I'll
even summon up the courage to start building a whole synth one day ;)
Chrz
been a while I know - and remote viewer of the forums - but thought
I'd let you know I finally got round to getting the bandpass and
matrix boards up and running with no probs (bar the everyday
distractions and sorting out a power supply) and it's all good : )
trying to get my head round doing some tests (and then maybe some
mods). I'd like to suss the slope and 'Q' out and think I'm on the
right track, but was wondering, if I'm not totally lost, can you
confirm the CGS is a '2nd order' filter?
From reading up a bit about these kind of state variable filters
(yours is essentially one o' these right?), I'm a bit foxed on
whether I should get the slope of 16 or 20dB that I seem to be
reading from my frequency plots. D'you know if that's about right? or
is it more like 12dB and I just can't read a bode plotter right :?
Q looks about 6 by my reckoning - does that sound about right?
Any suggestions on how to figured these if I'm a country mile out
would be gratefully recieved
Thanks in advance
Al
p.s. having admired it all from a far for years, now I'm hooked -
thou the family think I'm gone mad :) - ! I'm enjoying finally
getting my hands dirty - a convert to the cause, who knows maybe I'll
even summon up the courage to start building a whole synth one day ;)
Chrz