Jewels work- there's also a few options to look at
If you're an Elf: You need no real skill. You just need Song Woven Mantle (crafted sleeves from ML Recipe), +15 ring, +15 Bracelet, and either a Minstrel Talisman from the library collection or a Singing Axe (another ML recipe craftable).
Other Races: Since you can't use the Mantle sleeves, you either need 5 real skill, or an item that gives 5 more than normal Music (say, a +20 ring or bracelet from the dungeon revamps), or a +10 Music Dryad bow or fishing pole (do either exist?), or the bard version of that mask from Travesty.