[sdiy] audio signal to trigger (+9V)??

[marco mann]

hello, i've just started with diy (audio) electronics, and last week i finished my first project, a noisegenerator + simple adsr functions.
the box works by pushing a button which connects the +9V pole to the circuit untill you let go.

I want to be able to gate/sync it with audiosignal (for instance drum sounds), so i was thinking of making a audio to trig/gate converter, maybe external, so i can use it for future projects to.
I dont know if it is possible, but i also want a knob for input sensitivity, and if possible switches/knobs for contol functions
(some kind of trigger delay, a trigger inverter etc.), in short: as many options as possible!!  

Like i said: i dunno if what i want is all possible, but thats why i'm asking you..
tips/info/schematics(+which parts) anyone???

thanx, marcel
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