MOS Technology SID Features * one multi mode filter featuring (low-pass, high-pass, band-pass, notch-reject) with 12 dB/octave rolloff. The different filter-modes can be combined, for even more timbres. * three attack/decay/sustain/release (ADSR) volume controls, one for each audio oscillator. * three ring modulators. * oscillator sync for each audio oscillator. * two 8-bit A/D converters (typically used for game control paddles) * external audio input (for sound mixing with external signal sources) * random number/modulation generater paddle http://encyclopedia.thefreedictionary.com/paddle+%28game+controller%29 sounds like it might be easy enough to wire in an old atari joystick and port to the sid. ??? hows the progress peshay?