question about attenuators

godzilla · Post by **godzilla** » Thu May 04, 2006 11:24 pm

ok, what would happen if:

you plugged the output of a CV signal (say an LFO) into the input of one attenuator,
and plugged the output of that attenuator into the input of another attenuator,
then plugging that output into a CV input say filter cutoff

would both attenuators give the same response

or

would you get course tune and fine tune controls over the signal strength?

if so then using 2 attenuators would work really well when trying to fine tune that VCO on the ring mod pedal!

Bryan T · Post by **Bryan T** » Fri May 05, 2006 1:29 am

The attenuators on the CP-251 will give the same response, as they are the same type of pot and you would have simply put them in series. It would be cool if one acted as coarse and one as fine, but I think you'd need either different values for the two pots or a more complicated routing of the signal to achieve your goal. I'm sure someone with more electronics knowledge than I have could tell you the best way to get the result you are after.

Bryan

asd · Post by **asd** » Fri May 12, 2006 10:16 am

question since i don't really know much about how attenuators work (specifically the ones on moog's control processor).

so based on what bryan said, i have the impression that the attenuator if set at 100% will let 5 volts (?) through. setting it at 75% would let 3.75 volts through, 50%, 2.5 volts through, etc. so if you were using a 3 volt signal the attenuator wouldn't affect the signal until it was turned to less than 60%. is this how the 251's attenuators work and why you couldn't use one as a course and another as a fine tuner?

so an attenuator wouldn't take the input value (say 3 volts) and at 100% allow the full signal to pass and at 50% let only 1.5 volts, etc?