In a galaxy of 400 billion stars, where sentient life emerged on some 20 million distinct worlds, music, one of the hallmarks of civilized culture, has evolved in an almost limitless variety.
Some styles remain planetary bound, their appreciation limited to their progenitors. Gamorrean opera and baka rock has mostly failed to find an appreciative audience in the galaxy at large, outside of expatriate Gamorreans, who tout its snorting and squealing as sublime. Likewise Verpine choral arrangements, whose members rub their legs together to produce their version of music, are not particularly well-regarded other than by insectoid species. In a pangalactic community of such varied biology and aural temperament, some sonic compositions even have negative physical effects which their creators are immune to. The deafening noise of Aridinian folk music famously causes human ears to bleed within the sounding of a few notes and has thus been strictly regulated outside of its native system. The smazzo percussion group Shluur was once escorted off the planet Clak’dor VII after it was found the music of its avant-garde composer Wurokk provoked violent aggression in the native Bith population and nearly leveled the capitol city of Weogar in destructive riots.
Yet other genres, such as the perennially popular jizz, seem to break orbit from their homeworlds and join the Galactic community at large, changing and in turn being changed by its interactions with other cultures. Symphonic classical composition has been a kind of neutral musical ground for the expression of heterogeneous cultures for millennia. A few musical styles, such as the traditional music of the reptilian Tarasin of Cularin, achieve popularity because of the unique, pleasing effect they have on extraterrestrial species; in this case, inexplicably soothing the gills of aquatic peoples.
It is known that the Wookiees of Kashyyyk beat their tree drums in celebration of Life Day as early as 1,500,000 BBY, and early writings found in the Petrax Historic Quarter of Coruscant speak of attempts to duplicate with woodwind instruments the haunting moonsong that occurs when wind passes through the wingflutes of ringed moon shadowmoths. Millennia before the Battle of Yavin, the fragile-boned, flying reptilian Vors of Vortex in the Glythe sector were already performing their annual storm solstice Concert of the Winds, manipulating the passage of wind through the myriad tunnels and apertures of the mountainous, delicate crystalline Cathedral of Winds to produce complex, ethereal music unheard anywhere else in the galaxy.