Musical instruments of Azeroth

Flutes: Favoured by tauren and elves, flutes are either be transverse flutes (blow across an opening) or vertical flutes (blow into one end); in either case, the sound and pitch are manipulated by covering small holes with ones fingers. Those crafted for tauren are wider, shorter and played with a deeper tone, while elven flutes might be as long as 2-3 feet, creating a higher and more defined range of notes due to elven hearing, manual dexterity, and the pitch of the instruments. The most sturdy of any of the instruments, flutes tend to be either metal-reinforced wood or solid metal. Unless one can play a tune on an enchanted flute, its magic is beyond ones reach.
Harps: The harp is the predominant instrument among most of the races of Azeroth. They are commonly built by elven, dwarven, and human craftsfolk. They come in two sizes: small, triangular lap-harps with curving fore-pillars carved of wood or metal, bearing 20 to 36 metal strings (copper, brass, or electrum); and large orchestral harps, 6 feet tall with 47 strings and made entirely of wood. Their close-spaced strings in double or sometimes triple rows require delicate, skilled hands to create pleasant music. Nearly all the harps are enchanted, and any creature of any race or alignment can touch a harps strings to call forth its magic. If a harp is restrung, its magic will remain, though breaking the frame tends to disrupt and destroy the magic.
Horns: A long-favoured instrument of dwarves and orcs, horns of various shapes, sizes, pitches, and materials are the rarest of musical instruments in Azeroth. Outside of capital cities (where horns are used for grand announcements and greetings), few citizens make horns their instrument of choice. Those who favour horns develop far more intricate melodies and tunes on their hunting horns or trumpets than most. Those horns that possess magic often have one primary power that can be activated by anyone forcing a breath through it; musicians who own such a horn can often access powers long forgotten by their contemporaries.
Lutes: These stringed instruments are common among humans, dwarves, gnomes as well as high and blood elves; and a smattering of other folk learned to favor their easily learned music over the more common harps. Unlike harp music, lute music tends to be of quicker tempo and less-repetitive melody. The magic of lutes is not as strong and forceful as some enchanted harps, due to their lighter construction. Of all the instruments named here, the lute is among the more fragile in its light, all-wood fabrication.
Pipes: Night elves and tauren prefer these bundles of bound, woodland-style whistles and flutes, since they can be manufactured easily and far away from civilisation. Like horns, the primary magic of pipes is accessible by anyone blowing into them, but additional powers are known only to the owner or carver of a set of pipes.