From Alexander Zolotov:
No time to delve into the big and serious music apps? PixiTracker is what you need. It is a simple and fun tool to quickly create musical sketches, chiptunes and sound experiments. Without requiring a lot of musical knowledge. [Key features]. true warm pixel interface. pattern-based sequencer (tracker) with high quality sampler. several packs with unique sounds. sound recorder (from microphone or line-in). MIDI keyboard support. WAV export/import. export to XM - this file can be loaded by any modern music tracker/player (for example, SunVox). Wi-Fi export/import, iTunes File Sharing, audio copy/paste. Audiobus and IAA support. PixiTracker is also available for other systems (see the site). PixiTracker player is open source, so you can freely use it in your own Pixilang applications.