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H-Pi Instruments Flash Mini-poly-midi-micro-synth

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H-Pi Instruments has teamed up with mitxela (the genius behind the world's smallest MIDI synthesizer) to bring you FLASH, the world's first and only very-tiny MIDI-powered polyphonic microtonal FM synthesizer. Two years in development, this little 16-voice wonder fits in your pocket and doesn't require a power supply. Just plug it into a standard MIDI OUT port*, plug in your headphones, and away you go!

FLASH features unlimited dynamic General MIDI microtuning for ease-of-use with 16-channel polyphonic tuned output from TBX2, TBX1, and Tonal Plexus TPX keyboards, and also features a mini UART-programmer which allows you to assign unique microtonal tuning tables to each of 16 MIDI input channels for full microtonal output compatibility with literally thousands of standard MIDI controllers as well as multichannel controllers like MIDI guitars and MIDI organs without a tuning device, not to mention advanced 2048 unique-pitch-output for the Tonal Plexus and other microtonal controllers like the Microzone, Axis 64, and Terpstra keyboards. Of course you can also use it as a normal synth with normal tuning ... if you're into that sort of thing.

The FLASH UART-programmer interfaces via USB with Universal Tuning Editor (UTE) cross-platform software (free license included), so you can edit tunings and upload them to the synth. Firmware is also user-upgradable via the programmer, so features can be improved or added at any time.

NOTE: FLASH draws its power straight from the MIDI socket! All MIDI OUT ports which are made to the specification of the MIDI Manufacturer's Association (MMA) will work. MIDI OUT ports not made to the MMA spec will not work! Be sure you understand this before you buy. We will try to compile a list of MIDI devices which have non-compliant out ports (under construction).



+ Unlimited pitch General MIDI microtuning up to 16 voices polyphony
+ NOTE: The MIDI Manufacturer's Association has now officially recognized this method of microtuning, calling it MPE.
+ 16 full range programmable tunings of 128 notes each = 2048 programmable fixed pitches
+ Voluntary pitch bending from retuned fixed-pitch centres
+ Largest tuning error ~ 0.006 cents


+ FM synthesis engine designed by mitxela
+ Controllable via MIDI CCs

Voice Modes

+ POLY: 16 voices, one oscillator per voice, mono LR audio output
+ POLY-STEREO: 8 voices, one oscillator per voice, stereo audio output
+ MONO: 1 voice, 16 oscillators layered, mono LR audio output

Inputs and Outputs

+ MIDI DIN input (for MIDI and power)
+ 3,5 mm stereo headphones audio output


+ Designed in the UK by mitxela
+ Assembled in Bulgaria


+ Synth main housing made in Germany by Lumberg GmbH, Nickel-plated Zinc Alloy 50 x 14 x 14 mm
+ UART-programmer housing - Aluminium (2mm thick) 50 x 25 x 25 mm, hand made in Germany

Technical Specifications
Type: Digital
Synthesis: Frequency Modulation
Oscillators: 16
Waveforms: Sine
Osc Modulation: Continuous Controller, Input, Keyboard, Mod Wheel, Pitch Wheel, Velocity
Oscillator Notes:
2-operator FM synth
LFO: 1
Polyphony & Tuning
Polyphony: 16
Timbrality: 1
Tuning: Micro, Standard
Modes: Mono, Polyphonic
Patches RAM: 8kB
Storage: Internal
Editing: MIDI
Case: Pedal
Case Details: MIDI DIN Cable Jack
Dimensions (WxDxH): 50 x 25 x 25 mm
Audio Output Connections: 1/8" Phone Jack, Stereo Main
Audio Output Count: 2
MIDI Ports: IN
DAC Bits: 12
Power: 5V
Year Released: 2019
Design Notes:

Aaron Andrew Hunt (H-Pi Instruments · Germany) — Concept designer; wrote the synth specs in consultation mitxela; researched, developed and prepared the hardware enclosures, wrote the tuning / UART-programming software; responsible for the website, sales, shipping, support, and the final product; hired the team and funded the project.

Tim Alex Jacobs (mitxela · UK) — Mad scientist extraordinaire. Inventor and designer of the world’s smallest MIDI synthesizer which directly inspired this project; FLASH synth flex-PCB designer and firmware author; did the bulk of the hard work bringing this product to life.

Jordan Dimitrov Petkov (Largonet Ltd., MIDI Boutique · Bulgaria) — Electronics engineer. UART-programmer PCB engineer and firmware author; responsible for synth assembly and quality control.

Product Links
Company Product Sites:
[+] hpi.zentral.zone
[+] mitxela.com
Retail Street Price: $150 - convert

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