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Re: super psy lfo, volume control on each voice

2004-12-03 by sasami@hotkey.net.au

>
>
>hi all,
>I want to add a volume control to each of the osc on the super psy
>lfo.
>What is the best place to add a pot on the mix bus, before or after
>the 470K res? Can I add a 100k pot before the 470k res and be done?
>Are their affects on the mixer op-amp...

Before the 470k. CCW end to 0V/GND. CW end to output of inverter. Wiper to
the 470k resistor.

>btw I run the board in the audio range and build strang cords , then
>run this thru mulitap delays and get all kinds of interesting phase
>and comb filtering effects as I adjust the tuning. I need to add a
>fine tune pot in line with the main tuning pot. the main pot is 1m
>so 100k would be 10 percent, so maybe a 5k pot to dail it it just so.
>I love the "beating" between the tunings....

For really fine tuning, the lower the value of the pot the better, but you
will need a little "overlap" - its range must be greater than the finest
setting you can do with the 100k pot. As such, 5k is probably what you want.
10k is probably too coarse.

Ken
_______________________________________________________________________
Ken Stone sasami@... or sasami@...
Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>

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