I'm a guitar player and used to chords but finf using the pitch buttons non intuitive. The sample sounds seem to be in the key of C but if I want to use an A flat chord for example how do I do it?
You're right. The soundpool samples are limited. Your options are to...
1. Plug in your guitar into an audio interface or USB adapter and record your own riffs.
2. Plug in the audio from a keyboard into your Line-IN and record your own riffs.
3. Plug in a MIDI keyboard and record your own MIDI riffs in Vita.
4. Use the computer keyboard to record your own MIDI riffs in Vita.
5. Use your computer mouse to "draw" in the notes in Vita.
While MMM can be used successfully by musicians, it is also geared to allow non-musicians to have a certain degree of success and satisfaction.