understanding this oscillator

[Dimitree]

hi everyone
I have this schematic laying around, and I'd like to know how it works (if it does something)

LINK:
http://img89.imageshack.us/img89/4913/unled1gf.jpg

it should be an oscillator (square + triangle, selectable with the switch). all the variable resistors are trimmer, not pot. Opamps are powered with +15V and -15V
I'd like to know how it works, in general, and then I have those questions:

1) what input should be used for FREQUENCY and DEPTH? a DC value between 0V and 5V?
2) what's the max and min frequency for this oscillator?
3) what we can expect on the output?

many thanks

[EATyourGuitar]

thats a huge oscillator schematic compared to what you see in the average pedal. the +/-15 is pretty common in MOTM format modular synth. you might want to post on muffwiggler DIY section where people have already built it and use it.

[Dimitree]

thanks I try there

[Hides-His-Eyes]

If the CV control is what you're after have a look at Electric Druid's TAPLFO2 pic chip and circuit. Even more adaptable than that one and without the need for the OTA.