Nice work & the signals look good.
Just an 'IMO' commentary though: I kinda
at stereo systems on bikes (open-air loudspeakers, that is). I mean, if the point is to be able to listen to music while you're riding, don't quality earbuds do a MUCH better job of delivering decent sound-quality while cutting wind/road-noise? I'm sure they (open speakers) sound decent at low-speeds and behind a full fairing, but there still has to be a ton more noise than with isolating earphones. On the other hand, if the purpose is to let everyone else around you hear what you're listening to, well....