I had a GPA for 9 years, EXCELLENT for MIDI
There are cards for obtionnelle effects and output separate audio with SPDIF
sampler with a good pad, with a good converter

UTILIZATION

Manuel clear, easy to use for the creation in real time with the pads or a MIDI keyboard connected
but when we enter the changes made to the galley, to simply delete or move a large foot shift or change its velocity must be pascient, you enter the menu and sub menu, and not worth a good MIDI software

SOUNDS

I speak of sounds effects (map obtion) effects of good qualities, a good converter with its grain tipical AKAI

OVERALL OPINION

Plus, play with the pads rytme
costo a machine that made its reputation
Least, the programming menu and sub menu is tiring
I keep 8 years and have had a hard part with it
A beautiful machine