KORG M01D from Detune will turn your Nintendo 3DS into a music making machine. The software is an 8 part multi-timbral synthesizer with 8 tracks and 64 steps. The touch screen acts as a Kaoss pad and lets users edit chords, notes, and drums. After you create a song you can share it online or save it as a MIDI file on the SD card.
Check out "Dust" from Keishi Yonano, the composer from Asuka 120% Burning Fest and more recently Galgun, which was made using KORG M01D.
KORG M01D will be released as an eShop download for 3,000 yen ($30) on July 10 in Japan. Detune said an international release is slated for summer.