K770-KBD is a MIDI retrofit for Korg 770 / 700S / 900PS synthesizers.

The interface controls keyboard of the instrument. The arpeggiator with expanded features is embedded.

Main features:

• Controls the KORG's keyboard (CV for VCOs) from MIDI. The instrument's tone parameters are not MIDI controllable!
• User MIDI CCs control of the interface parameters (as well as SysEx for experts):
• - 49 MIDI Notes (4 octaves) range
• - User defineable size of received MIDI Notes buffer
• - Transpose function (over whole range of MIDI Notes)
• - Pitch bend (up to +/- 1 Octave)
• - Aftertouch (VCOs pitch modulation up to ± 4 semitones)
• - Arpeggiator (Up, Down and two Up-Down modes, all internal and external MIDI clock syncable)
• - Hold pedal (CC #64) with user adjustable note buffer size
• - Legato pedal (CC #68)
• - Local On/Off function (CC #122)
• - User defineable optical indication of the interface status
• 128 internal memory presets to store the interface user settings
• Instrument's keyboard, knobs, sliders and switches are not transmitted to MIDI! MIDI data are received only.
• MIDI Thru function (no MIDI Thrubox is necessary)
• Original features of the Korg instrument are not changed and the instrument can be used the same way as before the interface installation.
• Very easy installation without the instrument circuits modification.

The interface recognizes MIDI commands:

• Note On/Off
• Channel Aftertouch
• Program Change
• Pitch Bend (Wheel)
• Standard CCs (Hold, Legato, ASO, RAC, Local Off/On, ANO)
• Own CCs (Nr. 16 - 18, 20 - 23 and 119)
• Common MIDI Synchronization (Clock)
• Common System Reset
• System Exclusive Messages