Developer Scott Snibbe (http://snibbe.com) says Bubble Harp 1.0, his visual music app is now available in the Mac App Store. With Bubble Harp, it’s possible to create music just by moving your mouse or fingers.
Because it’s algorithmically generated, the song shifts subtly each time it repeats, like a jazz musician might riff on a scale or theme, Snibbe says. It’s based on his iOS app of the same name.
The Mac version features a new “heads-up” interface that pops up from the bottom of the screen to allow change the musical scale, tempo, drawing speed, and other parameters. Bubble Harp requires Mac OS X 10.6 or later and costs US$1.99.