via this eBay listing
"Akai S-612 (US model, including voltage converter). It was serviced just last year (faders were cleaned) and works perfectly. It has two additional special features:
1. The XD-280 Disk Emulator, which can be used to run an HxC Gotek floppy disk emulator (this one with an OLED and rotary encoder). A USB stick with a sound library is included.
2. The FDM Filter Defeat Module. The blue button on the front left next to the display allows you to deactivate the anti-aliasing filter in various ways. This can make the S-612 sound like an E-MU SP1200, with a very crunchy sound."









































