I have 60,000+ mp3s and I annotate and embed information ( ID3 tags )
in the mp3s. This includes album cover thumbnails, acquisition
notes, etc. and the lyrics if I have transcribed it.

I have used the program MP3 HTML Generator to make download links
generating html pages based upon the tags. But this doesn't work
right since going past windows 7. (hey I've been doing this for 20+
years).

Often I have no idea what all I have digitally "collected" over years.
So, as for searching, I upload everything, provide links to each individual
file (previews of mp3s are created by another program) and let google index
everything... including the scanned PDFs, mp3s, etc. Then I google
search the website.

I am sure that there are more elegant solutions with regards to the mp3s
(e.g. I saw a wordpress plugin that makes webpages based upon the mp3s in
a folder). I haven't had time to do much investigation as I've been working 18 to 30
hours overtime each week since Sept. But at least I say hello to Count d'Money