The OBXa-MK gives you new control and expanded patch capability for your Oberheim OB-Xa. The OBXa shipped from the factory with two configurations: 32 patch or 120 patches. Now with the OBXaMK, you can store 120 patches, just like later Oberheim products. The patches can be saved with the new SYSEX capabilities. You can transfer patches to another OBXa (with an Encore kit) or a computer. This is very useful for the older synthesizers that are starting to loose patches because of the battery's age.
Speaking of the battery, this MIDI kit stores all of its parameters in Flash ROM, including the patches! During installation, you actually remove the battery because it is no longer necessary. After installing this kit, you will never need your OBXa serviced for a dead battery again!
Maybe you never had the factory patches, or your cassette copy is bad or missing. Now you don't have to worry, because the OBXaMK has them built in! With a simple button combination, you can load the patch locations with the factory originals.
The OBXaMK allows you to control note on/off, pitchbend, filter cutoff, filter resonance, portamento and more. It can also transmit keypress information to MIDI so you can use the OBXa keyboard as a simple MIDI controller. The OBXaMK also sends and receives MIDI Tune Request. All parameter adjustment is done from the front panel, using the GROUP and PROGRAM buttons and LEDs.
Installation is very easy. There is no soldering to your OBXa circuitry. You have to remove several ICs from their sockets, mount the OBXAMK using supplied spacers, plug in a 40 PIN ribbon connector, and add MIDI jacks. (The MIDI jacks are actually the most difficult part, which lets you know how easy it is to install the OBXaMK)