Comment by thought_alarm

That's how digital audio was originally recorded to tape back in the 1970s and 80s: encode the data into a broadcast video signal and record it using a VCR.

In the age of $5000 10 MB hard drives, this was the only sensible way to work with the 600+ MB of data needed to master a compact disc.

That's also where the ubiquitous 44.1 kHz sample rate comes from. It was the fastest data rate could be reliably encoded into both NTSC and PAL broadcast signals. (For NTSC: 3 samples per scan line, 245 scan lines per frame, 60 frames per second = 44100 samples per second.)