<> And while we are at it, put one of the music programs on the PDP where <> you put an AM radio near it as the output device! < <I thought that was the Altair. <It was Dompier's altair, at some meeting. The TX-0 also played music, but <that was through a speaker. And I'm pretty sure the 11s had some sound <capabilities besides ^G... I'd been done with many machines in many ways. FYI: I have a PDP-11 board that does multivoice sound (gigilo was the name for it). It works too. I've hard it via d/a converters on an 11, via the line printer on a -10. The altair thing was via radio, but also there were not less that a dozen different sound and music boards for altairs/s100 systems. Some I might add were very good. At least one used the pinte line (shows the internal state of the 8080 processor interrupt enable flag). Allison