Really like it. For some reason I'd insist on spectrograph instead of qr - artifacts make the medium. The fragile bizarre distortions and loss of the double digitization of analog data - you'd end up with more of an instrument than a format.

Think along these lines https://youtu.be/Z7Zb4rso82M?si=3FYaidCwwVdUhocO

In a sense this is reinventing digital sound-on-film, but without the continuous feed and with a much lower tape speed. https://en.wikipedia.org/wiki/Sound-on-film

The compression choice is what makes this work. OPUS at 12 kbps is good enough to not embarrass itself — ten years ago you'd have needed a much faster tape speed to get acceptable audio. The paper tape is the aesthetic, the codec is doing the real work.