There is also music for dot matrix printers. One can even find MP3's of dot matrix printers online. -Adam Bob Ammerman wrote: > > In about 1975 I used a Data General Supernova minicomputer (serial number > 38) to generate sound using wavetable generation through a digital to analog > converter. I was able to get a sample rate of about 60 KHz, but was limited > to a single (arbitrary waveform) note at a time. My magnum opus was Also > Sprach Zarasuthra (sp?), the theme from 2001, A Space Odyssey. > > Also, using a an AM radio for music goes back _way_ before the TRS-80 Model > 1! I had a friend that wrote such a program for an IBM 1130 computer, around > 1972 or so. It played Flight of the Bumblebee. Very impressive! You could > put the radio on the other side of the room and still pick up the signal. > > Even before that, people were generating music using the _printer_ on an IBM > 1401 computer (maybe mid 60's?). The printer used a chain that ran in a > continuous loop and contained the characters on little slugs of metal type. > As the correct character went by a print position, a solenoid would fire a > little hammer and smash the chain into a ribbon to impress the character on > the paper. By carefully deciding what characters to print in what positions, > the frequency of the solenoid hits could be adjusted. I believe the most > popular song using this technology was Anchors Aweigh. > > Bob Ammerman > RAm Systems > (contract development of high performance, high function, low-level > software) > > -- > http://www.piclist.com hint: The PICList is archived three different > ways. See http://www.piclist.com/#archives for details. -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.