The Akai MPC2500 (eBay / Amazon) was the second release Akai made in 2005 and is the mid-range of the Akai line of MPCs. It has a 100,000 note, 64 track mixer with 64 assignable MIDI channels. Upgradeable to 128MB RAM, this version also had easy computer connectivity with its USB port. It contained a CompactFlash slot for storage of samples. This also included Chop Shop that was a feature built to chop a sample into as many as 64 pieces. A CD-R/DVD drive could also be added for burning and reading capabilities.