H-pi TBX-1 microtonal microtuning box

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Up for sale is a gently used H-Pi TBX-1 microtonal tuning box. This box can implement microtuning capabilities to most midi synths that respond to pitch bend cc’s. It works best with multitimbral synths or those that have Mode 4 (guitar mode, mks50, esq-m) for polyphonic use but can work for monophonic synths too. It has over 400 tunings included but you can upload your own from a computer. I highly recommend getting HPI’s Custom Scale Editor software if you pick this up as its easier and more intuitive than Scala for creating your own scales. Comes with original power supply Let me know if you have any questions. Thanks for looking!

From H-pi’s website:
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.
international switching power supply and MIDI cables included

Product Specs

Excellent (Used)

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About The Seller

Duende Lodge
Joined May 2016
Tacoma, WA, United States


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This product can be returned within 7 days of receipt.

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Items must be returned in original, as-shipped condition with all original packaging and no signs of use. Buyer assumes responsibility for all return shipping costs unless the item was not received as described.


Buyer receives a full refund in their original payment method less any shipping costs.

Duende Lodge

Tacoma, WA, United States
Joined: May 2016

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