For those that remember, in early copies of Windows (amongst other systems far better), there were sounds in the system folders or in Media which resided quietly amongst the alert sounds, etc. that one could play to test if their sound card(s) were working correctly. When testing hardware, I couldn't get a proper test of the audio on some models as Haiku does not include sample music or sounds that test the range of the connected speakers. Usually, I transfer a track to test play, but it would be quite nice to have said files baked into the image.
Without going on any further, why not add a few such files to Haiku? Perhaps even a public-domain classical piece may be included for this purpose. It would literally take nothing to code, and would just mean tossing an extra 3-12 MB into the build. Then again, this is, of course, just an idea that I thought of posting... thank you for reading it if nothing else.
P.S. (If this belongs in the idea box instead, my apologies).