Twitter’s music app is launching today.

I hope that Twitter and #music are separate ecosystems. Just because I like someone’s musical tastes doesn’t mean I’ll like what they tweet. And just because I like someone’s tweets doesn’t mean I’ll like their musical tastes. On the other hand, nearly every social music service uses Twitter as a way to find other people to follow.

Also Twitter is working with iTunes, Rdio, and Spotify. Compare with This Is My Jam, which uses Hype Machine, Grooveshark, and Youtube.