[sdiy] EG

["Rönnberg, Niklas"]

Hello!

Some days ago I dragged out my old project, the Littleman. It's based on
the Paia Fatman VCO and some Tom G circuits. I got some problems with the
EG. The Release is working quite ok, and the Sustain to. But I have some
serious problem with the Attack. The Attack is working nice for a few
seconds after you have turned on the power, but then it doesn't work at
all. No changes on the Attack knob makes any changes in the envelope. So
when you turn on the synth you can have a short and nice attack time or a
slow, but after a few seconds you can't control the attack at all. But then
you can make slower attack times using the Decay knob, but I don't want it
this way...

Can anyone help me out?

You can find the schematic here:
http://www.itn.liu.se/~nikro/diy/littleman/littleman.pdf

Thanks!

/Niklas