hello. i am still very new to any kind of electronic projects. i am to the point where i can read simple schematics and put them together and have them work on the first couple of tries but i am trying to do something here kind of of the cuff. i found this schematic for a photo theremin (which i was later told is not any kind of theremin but some kind of transistor, but any way). i have built one now and got it to work and know i want to take the photo resistor out and put other things in to controle the pitch. what i am planning on know is a series of swithches connected to resistors to controle the pitch, puch one and its this sound, push another and its this pitch, basicly trying to make one of those cheap keyboards i used to get when i was a kid that had candy in one compartment. i originaly thought, for some reason, that i could take two resistors and hook them together and it would combine there resistance, then i put it on a breadboard and it dawned on me that it is only going to be the resistence of the lowest resistor (i think).