I took 104588_meral_celtic-meral. Wav, ran a loop through sharm studio to pan it bilaterally (left-right channel oscillation) at 359 times a minute (359 cpm), which seems to align with the bpm of the loop.
For my own obscure reason i took file 389436, looped it so that it repeats at 60 bpm, added about 25% echo, then added bilateral panning at 15 cycles per minute (cpm).