JJ OS is alternative firmware for the Akai MPC.
Buy it.
Updates
1. If the channel of MIDI OUT is changed pressing a pad,
the sound of an external sound source will not stop.
1. CYCLE (A sample is switched each time it
hits the same pad.)
Refer to manual.
Refer to video.
2. Track Mute Groups (The
tracks of the same group will be muted together.)
Refer to manual.
Refer to video.