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The OBX-MK gives you new control and expanded patch capability for your Oberheim OB-X. The OBX originally shipped with 32 patch locations. Now with the OBXMK, 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 OBX (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.

Maybe you never had the factory patches, or your cassette copy is bad or missing. Now you don't have to worry, because the OBXMK has them built in! With a simple button combination, you can load the first 32 RAM patches with the factory originals. The OBXMK 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 OBX keyboard as a simple MIDI controller. The OBXMK also sends and receives MIDI Tune Request. All parameter adjustment is done from the front panel, using the GROUP and PROGRAM buttons and LEDs.

Picture of OB-X MIDIKit


Here is a list of features:

Selectable MIDI channel. Expanded patch storage from 32 up to 120!
MIDI pitch bend. Fixed at one whole step.
(Controller #07d)Portamento adjustment (Controller #01d)MIDI Volume controller modifies VCA sustain amount.
(Controller #05d)General Purpose controller #1 to Filter Frequency. (Controller #16d)General Purpose controller #2 to Filter Resonance.
(Controller #17d)General Purpose controller #3 to Filter Modulation. (Controller #18d)General Purpose controller #4 to Oscillator Pulse Width.
(Controller #19d)General Purpose controller #5 to Modulation LFO Rate. (Controller #80d)General Purpose controller #6 to Modulation Pulse Width.
(Controller #81d)Continous controller  #20 to VCF Envelope Generator AttackContinous controller  #21 to VCF Envelope Generator Decay
Continous controller  #22 to VCF Envelope Generator SustainContinous controller  #23 to VCF Envelope Generator
ReleaseContinous controller  #24 to VCA Envelope Generator AttackContinous controller  #25 to VCA Envelope Generator Decay
Continous controller  #26 to VCA Envelope Generator Sustain Continous controller  #27 to VCA Envelope Generator Release
Hold from MIDI (Controller #64d) AUTOTUNE from MIDI
Tune RequestSeveral SYS-EX data transfer options. Transfer 120 patches or transfer any single patch.
OBX keyboard transmits notes to MIDI. The original 32 factory sounds are in the Encore ROM.
MIDI Modulation to LFO amount.


All the functions can be accessed from the front panel. There is no need to set "dip switches" to adjust anything. The OBX-MK works with ALL versions of OBX's, even the ones with software LED refresh. Encore's standard warranty includes 1 year parts.