So I'm planning on circuit bending this crappy little toy drummachine thing. It plays 4 different little breakbeats, normally. So, I'm going to switch out a resistor with a variable resistor so that you can change the pitch, and I'm also going to put in a passive ring modulator to make the beats sound really strange. For a reference signal for the ring modulator, I'm probably going to use the audio output of a tiny AM radio, or somesuch, so the sound should change over time, depending on what is on the radio.