ESI Xsynth 25 Key Portable Synthesizer Controller

ESI Xsynth is a portable synthesizer designed for music creation across mobile and desktop environments. It enables sound generation, MIDI control, and audio interfacing for musicians working with hardware and software systems. This makes it ideal for studio, travel, and hybrid setups where integrated control and sound generation are critical.

The device operates as a standalone synthesizer or as a controller and interface when connected to a computer or mobile device. Sound shaping and performance functions are accessed through onboard encoders, keys, and control buttons. Audio and MIDI data are transmitted through a single USB-C connection.

This design supports flexible production workflows without requiring additional interfaces. It allows users to sketch ideas, perform, and record using a compact device. Integrated connectivity enables quick integration into existing setups.

Key Features

• Integrated Synth Engine: Operates as a standalone virtual analog synthesizer
• 25 Full-Size Keys: Velocity-sensitive keyboard with polyphonic aftertouch
• Audio and MIDI Interface: Combines sound generation, audio I O, and MIDI control in one unit
• USB-C Connectivity: Provides power, audio, and MIDI through a single connection
• Portable Aluminum Chassis: Slim form factor designed for mobile and desktop use

Technical Specifications

Product Type
Compact synthesizer with integrated keyboard, MIDI interface, and audio interface

Synthesis Architecture
Virtual analog subtractive synthesis based on samples

Polyphony
Up to 10 voices

Oscillators
3 oscillators

LFOs
3 LFOs

Envelopes
3 AHDSR envelopes (Attack, Hold, Decay, Sustain, Release)

Modulation Matrix
16 modulation matrix slots

Patch Memory
512 sounds
4 banks with 128 patches each

Effects
3 effect sections
EQ

Keyboard
25 velocity-sensitive full-width keys
Polyphonic aftertouch

Performance Functions
Arpeggiator
Glide
Octave shift
Hold
Pressure-sensitive modulation and pitch bend buttons

Audio Interface
24-bit / 96 kHz audio interface
Recording of synth engine output directly to computer
Playback routed to headphones and line out
Recording of external signals through Aux In

MIDI Interface
USB MIDI connection to computer
DIN MIDI input and output via 3.5 mm TRS jacks
DIN MIDI can be bridged to USB

Connections
USB-C for power, audio, and MIDI
Headphones output via 3.5 mm TRS
Line out via 3.5 mm TRS
Aux in via 3.5 mm TRS

Power
Bus-powered over USB-C
Power consumption less than 400 mA at 5 V
Less than 2 W

Dimensions
Width: 387 mm
Depth: 148 mm
Height: 27 mm