A few years back Computerphile did a video about how making ‘floppy drive music’ actually works:
I’m not sure it would be quite as precise with the Pokitto’s SD card drive.
It depends what’s actually causing the interference.
Some useless but somewhat interesting trivia…
The tune being played by the 1541 drive is “Daisy Bell (Bicycle Built for Two)”, which is actually the first song ever played using computer speech synthesis - ‘sung’ by an IBM 704 in 1961.
Science fiction author Arthur C. Clarke was actually present during a demonstration of the IBM 704’s ‘singing’, which is why he referenced it in his 1968 novel (and later film) 2001: A Space Odyssey by having the rogue AI HAL sing it.
Also the program being run is most likely “Sing Song Serenade”, which was written by Christopher C. Capon in 1985 for the Commodore 1541 floppy drive.