The MOTM-650 is a full-featured four-channel MIDI-CV converter.

  • Voice allocations settable as four 1 voice, two 2 voice, or one 4 voice group - each voice group separately addressable via MIDI
  • Voice assignment modes on a per voice configuration: Poly 1, Poly 1 steal, Poly 2, Poly 2 steal, Unison, Solo Unison, Solo, Solo Rotate
  • Dual arpeggiators, each arpeggiator assignable to any active voice group (one arpeggiator per voice group)
  • Arpeggiator clock sources: MIDI IN Clock, internal clock (60-238 BPM weighted), external
  • Arpeggiator clock divisors /4, /3, /2, /1.5, 1X, 1.5X, 2X, 4X the clock rate
  • Arpeggiator note order: up, down, up/down, down/up
  • Arpeggiator modes: normal, ordered, ping pong, random
  • Portamento: per voice group configurable as constant rate or constant time
  • Each voice group is independently configurable
  • Firmware can be updated via MIDI
  • All options can be set via MIDI CCs, MIDI SysEx, or the front panel user interface
  • Settings and state are remembered across power cycles
  • Patch storage for settings (up to 32), recallable via MIDI patch change command
  • Microtuning per MIDI spec
  • Pitch bend adjustable from +/- 0 to 24 to be added to note CV on all voices
  • Each of 4 Aux outputs assignable to pitch bend, channel aftertouch, or any MIDI CC
  • Velocity jack on each voice can be configured to be velocity or a trigger, providing a 5ms pulse when the voice is retriggered
  • LEDs to monitor MIDI IN activity, internal/external/MIDI clock, and voice gate operation
  • 8x2 LCD with variable backlight and four buttons for the user interface
  • External Clock In jack
  • Transmits MIDI clock if set to external/internal clock

The MOTM-650 packs all these features into a 2U wide module, using the latest SMT data converters, low-drift op-amps, and precision voltage references. Most MIDI-CV converters use 12-bit DACs: the MOTM-650 uses a true 16-bit DAC, and an octal 10-bit DAC for the Velocity/Aux outputs. No other MIDI-CV converter has as many features in a small space.

This module requires a MOTM-950 or another power supply with a 6-pin MTA-156 connector (+5V @ 575ma).