MMORPG.com Lord of the Rings Online Correspondent Jim Braner writes this overview of the music system in Turbine's Lord of the Rings Online.

If you have spent any time running around Middle Earth with your speakers on, you have heard the various tunes and kinds of music around. The Shire with its warm Celtic feel, the Lone Lands with its... well I can't actually remember what kind of music it has. Memorable or not, you can make music too! We have all seen Minstrels with their lutes and harps in battle and various players in seemingly random spots playing away. Besides the lute and harp there is also the theorbo, clarinet, horn, cow bell, drum, flute, and bagpipes. Each class has passive skills purchasable from their trainer for two of those instruments; except Minstrels who can purchase passive skills for them all. Each passive instrument skill will cost you 2 silver and 50 copper.

After you purchase the passive skill, you need the instrument that goes with it. Head to any Bard for that. The Bard in the Prancing Pony in Bree is easy enough to get to if you don't happen to remember where any others are.

Read The Sound of Music in LotRO