] I've modified an Epson LQ-500 dot matrix printer into a ] musical instrument. The project has now evolved into two ] different versions. The original project had two ] independent sound generators: a tape based sound ] generator similar in concept to a mellotron and tones ] generated from the print head. The new version of the ] software is written with the concept of turning the ] printer into an instrument without any physical ] modifications to the printer. Since the tape mellotron ] setup does require some modifications to the printer, it ] is not part of the new version. ] ] ] Most of the changes to the printer operation are done by ] changing the software. The printer is controlled by a NEC ] 7810 microprocessor that runs off code on an EPROM inside ] the printer. I have reverse engineered most of the basic ] operation of the printer and now have control of the ] paper feeder motor, the print head, the lights, the error ] beeper, and can read the buttons. This is really neat. I never would have thought to try and make music from one of those old noisey things. Dot Matrix Synth |