Greetings, all.

The number of companies building MIDI driver boards, suitable for use
in mechanical music, is amazingly still growing.  Listed below are some
specifications for the latest couple I've found.  For an up-to-date
list, links and retail prices, please check my MIDI-to-anything 'web
site at:  http://www.calpoly.edu/~cwoodwor/midi.html

Pete Woodworth

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PAVO
MIDItools Kits!
PAVO offers a huge range of MIDI-related kits for your customization.
NEW: 64- or 128-Output high-current driver.
Independently control 64 high-current sink outputs from MIDI Note on/off
commands.  Connect drivers to control any combination of relays,
solenoids, electromagnets, or even low-current devices.  Add a second
expansion board and get 128 drivers total!


Laser Images, Inc.  [Yup, it's the Lazerium folks.]
MIDIanaz interface:
MIDIanaz has 64 analog outputs and 48 digital outputs.  By configuring
as separate instruments, sixteen units can be run from one MIDI source.
  MIDI Input: Can be set to respond to MIDI Channel 1-16.
  Analog Outputs: 0 to10 VDC (16 12-bit / 48 7-bit into a 2K-ohm load).
  Digital Outputs: 48 open collector outputs (30 VDC max).
  Size: 19" rackmount, 1.75" (1U ) high, 10" deep.
  Power Requirements: 100-240 VAC @500 mA (max).