On the subject of MIDI on the go.
There are mini MIDI controllers ranging from 40 to 100 USD.
You can find the Korg Nano Key for 40 bucks, avg. 50
Akai LPK25 down to 50, avg 60
LPD8 down to 60, avg. 70
Mini MPK down to 80, avg. 100
These are not expensive and they work great.
