The JP-MiniSynth Cyber Edition on a black background. A grey case with a display, white octagonal knobs, an orange volume knob and white and grey keys. The JP-MIDIKey13 and JP-MIDIKey25 MIDI keyboards lie behind it

Portable 17-Key

Sonic Armament

JP-MiniSynth Cyber Edition

Primary17 magnetic keys / 39 sounds / 8 knobs and volume
SidearmJP-MIDIKey13 and JP-MIDIKey25 MIDI keyboards

⚠ WARNING

This unit fires sound, not bullets.

One fingertip can turn the tide.
How deep you press becomes your weapon.

Key Specifications

17keys (magnetic)

39onboard sounds

8+1control knobs + volume

212mmpanel width

Cyber Edition

Identification color: orange.

Built for operation in the dark: the volume knob wears orange for identification, and the sound knobs are octagonal. You can tell them apart by touch.

Internally identical to the Minimal Edition. Only the case has been swapped.

The JP-MiniSynth Cyber Edition from above: a handle at the back, a speaker at the left, a display showing HELL SYNC, an orange volume knob, 8 white octagonal knobs, 10 function keys and 17 white and grey keys

A close view of the JP-MiniSynth Cyber Edition: the display showing the HELL SYNC waveform, the orange volume knob and white octagonal knobs, with the handle and a MIDI keyboard behind

MIDI Keyboards

Your sidearm, squared away.

The JP-MIDIKey13 and JP-MIDIKey25 are MIDI keyboards with the same magnetic keys as the JP-MiniSynth. They carry no sound engine of their own: connect over USB or Bluetooth and operate with the sounds of the connected device. On an iPhone or iPad, JPSoundEngine can play them.

JP-MIDIKey13

A 13-key MIDI keyboard that is easy to take anywhere.

Keys: 13 magnetic keys, C4–C5
Function keys: OCT−, OCT+, SUSTAIN
Interface: USB-C (USB MIDI), Bluetooth MIDI
Dimensions: 254 × 66mm

JP-MIDIKey25

A 25-key MIDI keyboard with two full octaves.

Keys: 25 magnetic keys, C3–C5
Function keys: OCT−, OCT+, SUSTAIN
Interface: USB-C (USB MIDI), Bluetooth MIDI
Dimensions: 387 × 66mm

These are in-development specifications and may change.

Expression

Compact.
Highly expressive.

The key switches are magnetic and read how deep each key is pressed, continuously. The sound keeps moving with your finger after the note starts. Depth gives a small keyboard a wide range of expression.

Strike velocity

EP KEYS, basses and others: play hard for loud, softly for quiet. The keys read how fast you press, so it feels like a normal keyboard.

Press depth

20 sounds, including leads and pads, sound in full at the bottom of the key. Lift your finger and they get quieter and darker, one note of a chord at a time.

Wind

TRUMPET, TENOR SAX and CLARINET are physically modeled winds. Key depth becomes breath, so you can phrase as if you were blowing.

Press depth, in detail

Sounds

Pick one.
Turn a little.

The 8 knobs always do the same job. There are no pages of detailed settings: everything you shape the sound with is under your hand. Choose from 39 sounds and change them a little as you play. Turn on CHORD and ARP, and a single key plays an arpeggiated chord in your key.

SOUND
BRIGHT
RESO
ATTACK
RELEASE
WOBBLE
SPACE
TEMPO

WARM PAD
SUPER SAW
SUB BASS
SOFT LEAD
GLASS BELL
DRAWBAR ORG
STRINGS
PLUCK
EP TINE
CHOIR AH
BRASS
WIND FX
BREATH LEAD
TRUMPET
TENOR SAX
CLARINET
GYUN LEAD
SYNC LEAD
SEQ RIFF
RAVE STAB
DIGI KEYS
STRAIGHT
SHINY LEAD
SYNTH BRASS
SYNTH BASS
ACID BASS
FAT BASS
SEQ BASS
SWELL PAD
BOW STRINGS
DEPTH SYNC
BEND KEYS
PAD BASE
HELL SYNC
SYNC SWARM
CHAOS GROWL
SIREN
BP SCREAM
SYNC BASS

Sounds that respond to depth or breath

See sound details

Minimal Edition

Another case: the Minimal Edition.

A light grey face with lime knobs, in the colors shared across JProducts. A quiet, minimal case.

The panel is 212 × 145mm. Standard-size keycaps, 17 of them, keep it compact. OCT± shifts the range.

The JP-MiniSynth Minimal Edition from above. A speaker at the top left, a display showing SUPER SAW in the center, then 8 lime knobs, 10 function keys and 17 white and grey keys — The prototype. The case and keycaps are 3D printed.

Take it with you

Over your shoulder
and out the door.

Mount it on its dedicated bag and carry it from a shoulder strap. Open the soft-looking bag and the synth lifts with the lid, with room inside for an iPhone and small items.

An Arca-Swiss rail on the back attaches and releases the bag. The same rail fits an Arca-Swiss tripod.

JP-MiniSynth hanging from a shoulder strap and steadied by a hand. A bag with a lime edge sits under the synth, and the strap runs through a ring at the corner — The Minimal Edition mounted on the bag and carried from the strap.

Inside

From the board
to the sound.

The board, the case, the keycaps and the sound engine software are all my own work. The microcontroller is an ESP32-S3.

Sound passes through a DAC and an amplifier and comes out as analog: the built-in speaker, headphones or line out.

The green JP-MiniSynth board during assembly, with encoders and an ESP32-S3, and magnetic switches and keycaps in a plate at the front

Specifications

Keys: 17 MX-compatible magnetic (Hall effect) keys, C4–E5OCT± shifts by one octave. Velocity and aftertouch
Sound engine: 39 sounds, up to 8 voicesLayered sounds use fewer voices; some sounds are monophonic
Chord and ARP: Chords in 24 keys, 11 arpeggiator patterns
Knobs: 9 detented rotary encoders (8 for sound, 1 for volume)
Function keys: 10 MX Brown
Display: 2.79-inch IPS color LCD (428 × 142)
Audio out: Built-in speaker, 3.5mm headphones, 3.5mm line
Connection and power: USB-C (USB MIDI, bus power)
Microcontroller: ESP32-S3
Size: 212 × 145mm, case thickness 17.1mmSize of the Minimal Edition
Carrying: Dedicated bag and strap, Arca-Swiss railFor the Minimal Edition

These are in-development specifications and may change.

See it in person

Deploying to NT Nagoya 2026.

The Cyber Edition will be on display too. Sales details will be announced once decided. If you are interested, feel free to reach out on X.

Message @junpeiwada