Convert your QWERTY Keyboard into Accordion/Piano with VMPK.

VMPK is a wonderful Virtual MIDI Piano Keyboard. There are 128 instruments (called Program) to play. It has its own Synthesizer SonivoxEAS, so you don't need any other. I have played a song on it and recorded on Audacity without starting Jackd.

I used following keys:
vbhq wrt6
to play the song
"Jane Kahan Gaye Wo DIN" using Accordion. You can also try.