I seem to recall reading about this running on minicomputers or mainframes, as described in another reply, and I also think this predated the Altair, as I first

I seem to recall reading about this running on minicomputers or mainframes, as described in another reply, and I also think this predated the Altair, as I first became smitten with computers around 1972. Here's a video of a minicomputer generating AM radio music in 1971: https://www.youtube.com/watch?v=akvSE5Z474c&lc=D5Mdy7u7CxwskML7wm06K0-_TEHfmrxPlonoX60N9Ho https://www.youtube.com/watch?v=akvSE5Z474c&lc=D5Mdy7u7Cxwsk...