Not many music app sales this weekend so we stretched it out to include the past week or so:
Free

Bugle ($0.99 > Free) - it’s free
iXY MIDI Controller ($0.99 > Free) - get it while it’s free!
MIDI Motion Machine ($0.99 > Free) - accelerometer based MIDI controller app

$0.99 and Up

Name That Guitar Riff ($1.99 > $0.99) [...]

If you’re a guitar player like me and like to have your guitar with you at all times you will probably like PocketGuitar. Obviously no virtual guitar can take the place of the real thing, but PocketGuitar makes a fun go at it and does a great job. There are several guitars available in [...]

I was dying to download Bloom when I first heard about it a few months ago. A music app by Brian Eno? Who wouldn’t want it?
Bloom is a music unique music app designed by Brian Eno and software designer Peter Chilvers that allows you to create melodies by tapping on the screen. If you [...]

Obviously, one of the problems with using the iPhone as a musical instrument is that it is extremely small; especially if you plan on using it as a piano. There are several pianos available for the iPhone, but most of them only have about an octave to work with… about 8 white keys across. [...]

Developers are really continually pushing boundaries with the iPhone. Our latest favorite music app is called Ocarina developed by Smule. The ocarina is an ancient instrument originating from thousands of years ago and is very easy to learn.
With the iPhone version of Ocarina you make sounds by using your breath and blowing into the mic. [...]