Filter sweep down instead of up with MF-101 ?

psi · Post by **psi** » Mon Jan 23, 2006 2:10 am

Does anyone know of any mods or patches that would accomplish this? Would sending an inverted ENVELOPE OUT signal to the CUTOFF IN jack accomplish this?

basssfx · Post by **basssfx** » Mon Jan 23, 2006 3:24 pm

Have a look through this first:

http://moogmusic.com/forum/viewtopic.ph ... wtooth+lfo

Basically you will need to attenuate your envelope CV after it is inverted (i.e add +5V) because the CV is not bipolar. (A bipolar CV would be +x to -x).

It should work after this. Hope it helps; the thread is quite useful.

kb · Post by kb » Fri Jan 27, 2006 9:40 pm

cp251 inverted output

psi · Post by **psi** » Sun Jan 29, 2006 5:28 am

kb wrote:cp251 inverted output

Is the inverted output negative CV or positive CV? I think it needs to be positive correct? Are you sure this would work?

kb · Post by kb » Mon Jan 30, 2006 7:52 am

it is the way.
101 env out to cp251 mixer. Negative (inverted) out to cutoff.

you can even run the positive signal to the phaser sweep and have 2 sweeps going in different directions.

psi · Post by **psi** » Mon Jan 30, 2006 12:53 pm

kb wrote:it is the way.
101 env out to cp251 mixer. Negative (inverted) out to cutoff.

you can even run the positive signal to the phaser sweep and have 2 sweeps going in different directions.

Thanks, kb. Any chance I can get a sound clip of the inverted sweep? I read somewhere that it doesn't sound like a typical down-sweep. I understood that it sounds more like a "owwaahh" instead of a "owwwww"

kb · Post by kb » Thu Feb 02, 2006 10:30 pm

I can't mp3 just yet. But, I do have some wild recordings to share when I get a chance.