The Korg M3 MAL Hinge allows you to expand the capabilities of your Korg M3 music workstation/sampler. Korg's Komponent System approach allows you to use the M3 MAL Hinge (along with the MAT tray, sold separately) to mount a Radias-R analog modeling synth module on your M3 workstation, or (on the 73-key and 88-key models) add an additional M3-M sound generator module or Radias-R.