I didn’t read the whole article carefully, but I saw references to sample rates well above 44Khz, and to upper harmonics well above hearing range. So I wonder if to some degree this technique can be thought of as serial, vs. regular PCM audio being parallel. That is, instead of having more simultaneous bits of amplitude (y axis), you use higher resolution in the x axis to compensate.
I’ve heard of 1-bit audio amplifiers: the amp is either putting out full power or nothing, but it switches extremely rapidly, much faster than speaker cones can keep up, so the cones end up interpolating the waveform (with very high fidelity, apparently.)
Great article! I was reminded of the “1-Bit Symphony” by Tristan Perich (2009). The physical version of the piece is a circuit built into a standard, clear plastic CD jewel case. Summary of the works with photos here: https://marijebaalman.eu/dafx/pages/1bitMusic.html
Yes! I was given “1-Bit Symphony” as a gift about 10 years ago and blown away. I honestly was so mesmerized by the idea that polyphony could be achieved on a single pin. I’ve gone down a bit of a rabbit hole the last week after reading this article and have found that there is quite a bit more resources on this topic since the last time I attempted to look into it.
Dr. Blake Troise, (aka PROTODOME), the author of the the article, has an album on a chip as well. You can actually view the source code for the album here
Anyway, I’m glad you found some joy in the article as well :).
Wow! Tristan Perich also published a large physical book of the first 1/100th of a second of “1-Bit Symphony” … too cool.