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It just occurred to me to wonder if that big old drive could source the bits fast enough to play without skipping.

8800cps, says Wikipedia. 6-bit characters with parity, so 52.8kbits/s, not really enough. Looks like the 1405 was the first drive that could sustain 128kbits/s. You'd still have a problem with the CPU, though: I can't immediately find a reference for the clock speed of 1400 series CPUs, but I'd bet it's a long, long way short of being able to decode MP3 in real-time, considering even the much later Stretch supercomputer wouldn't have been able to.

Peter