Do you fly to music?

Do any of you listen to music while flying? If so, do you listen
yourself, or do passengers listen, or do you all listen? Is there any
regulatory obstacle to this? (Some aircraft are apparently equipped
for it, so it must be allowed.)

I don't listen to music when driving because it distracts me, which is
hazardous, and I'd probably be the same way when flying. However, I
suppose passengers might like music.

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