One of the hacks coming out of this weekend's Music Hack Day, held in New York City, is Patternsketch.
With it, you can create audio patterns, play them back, adjust playback tempo, volume, and change the audio kit. You can also save, export, and collaborate with your friends.
According to the developers, Patternsketch is "an exercise in imagining what browser based music tools could be, and an exploration in the possibilities of new web technologies." The goal of this project was to create a tool that musicians and casual music fans could use to create music patterns and collaborate on rhythmic ideas with friends.
The performance of Patternsketch can't compete with native apps - but it's nevertheless a fun proof of concept and a taste of what the future holds for musical app development.