MATRIXSYNTH: H-Pi TBX1 MIDI Tuning Box Microtonal Keyboard Synthesizer Tuner Converter

Sunday, April 07, 2019

H-Pi TBX1 MIDI Tuning Box Microtonal Keyboard Synthesizer Tuner Converter

via this auction

See this post for a demo of the H-Pi TBX1.


Got a standard MIDI keyboard? Retune it! TBX1 makes retuning as easy as pushing a button. Attach this little box to your synth and you can make any key play any pitch you want. It comes preloaded with 128 tunings for you to try out, and stores tuning tables in 4 layers, totaling over 500 tunings, which you can easily edit with Custom Scale Editor (cross-platform software, license included). Set up your own tuning, upload it to TBX1, and plug into any General MIDI controller and synthesizer to make your music. Portable and ready for the stage, TBX1 can also run for eight hours on batteries.


128 tables x 4 layers = 512 full range programmable tunings

General MIDI compatibility — Compatibility Requirements


jog dial: select and enter preset program parameters

MIDI LEDs: monitor MIDI IN and MIDI OUT traffic

LCD display: currently selected tuning, bank, patch and polyphony (with backlight ON/OFF switch)

sixteen channel switches: selectable MIDI output channel polyphony, from 1 to 16 voices

fifteen preset buttons: store and recall tuning, synthesizer bank and patch

14-bit MIDI pitch bend resolution: 0.01 cents

bypass switch: turn tuning function on and off without swapping cables

External MIDI Message Pedal / Sequencer Control

receive tuning table Changes

receive bank and patch changes

full sustain pedal support

full control of held key behavior when tuning table change messages are received

Inputs and Outputs

12V DC power input

MIDI IN: connect to any MIDI controller (keyboard, sequencer, etc.)

connect computer to MIDI IN to upload tunings

MIDI OUT: connect to any general MIDI tone module, sampler or computer MIDI interface for tuned output

sends the following MIDI data on selected channels

bank select, patch change, pitch bend range RPNs, 14-bit pitch bend

note on / note off (one note per channel = monotimbral up to 16 voice polyphony)

MIDI Velocity, Modulation, and Volume are passed as received at MIDI IN

MIDI THRU: sends unmodified MIDI data received at the MIDI in through to another unit."

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