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Analog Modeling Synthesizer
  • Overview
  • Key Features
  • Tech Specs
  • FAQs
  • Documents & Downloads

Developed by innovative Alesis engineering and DSP technology, the Alesis ION is a high-resolution analog modeling synthesizer offering breakthrough processing power, real-time control, and great value.

Built on a 500 MIPS processor platform (500 million instructions per second), the ION offers continuously variable wave shapes, plus sync and FM synthesis. 16 filter types are included, along with two LFOs, Sample & Hold, and an Arpeggiator—all of which sync to MIDI clock. The ION has 8-voice polyphony with 3 oscillators per voice, and is 4-part multi-timbral. A powerful and intuitive modulation matrix is built in, as well as a 40-band vocoder that does not use up any polyphony.

Download the Ion Vocoder Tutorial now.

  • The ION features an ergonomic user interface with 3 variably-illuminating control wheels and 31 amply spaced control knobs. The knobs are 360 degree potentiometers with 12-bit resolution, yielding 32 times the resolution of a typical MIDI controller, yet still compatible with the latest sequencers via NRPNs (Non-Registered Parameter Numbers). The result is extraordinary precision—void of any undesirable digital artifacts—and a very “analog” sound throughout the entire frequency range.

  • A 160x160 graphic display provides instant visual feedback as a parameter is edited. The ION keyboard contains 49 velocity-sensitive keys, 4 analog outputs and 2 stereo analog inputs (all balanced and using 24-bit conversion), 4 individual insert effects, a stereo master multi-FX processor, and an internal universal power supply.

  • Developed by a world-class sound design team, many of whom programmed the flagship Andromeda synthesizer, the ION’s 512 user-rewritable presets cover a variety of genres, including many exciting new tonalities, as well as classic synth emulations. New sounds will also be available from the Alesis website, as will a Flash demo of the ION.

Polyphony/Multitimbral Parts

  • 8/8

Waveform Memory ROM/RAM

  • 16/0 MB

Filter Types/Resonance

  • 16/&

Single Programs ROM/RAM

  • 512/128

Multitimbral Performances ROM/RAM

  • 4


  • Yes

GM/GS/GX Compatible

  • Y/N/N

# of Keys

  • 49

# of Keyboard Zones

  • 16

Left Hand Controllers

  • Pitch; (2) mod

Aftertouch (Poly/Channel)

  • Y/Y

# and Type of Controller Inputs

  • (1) pedal

# of Sequencer Tracks/PPQN

  • N/A


  • yes

# of Effects Processors/Effects Programs

  • 512

# of Outputs/Type

  • (4) analog TRS
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  • How do I reinitialize my ion keyboard?

    Third item on last page of global menu. If it’s not there...update the O.S.

    Note: Does NOT clear memory
Live DocumentsType
Product Overviewhtml
Manuals & DocumentationSizeType
ion - QuickStart Guide
400 KBpdf
ion - Reference Manual
2 MBpdf
ion - Program Chart
103 KBpdf
ion - Vocoder Tutorial
12 KBpdf
Software & DriversSizeType
ion Firmware v1.06
This is version 1.06 of the Ion Firmware.
271 KBzip
ion & Micron Program Decoder v1.0
This is a command line utility to convert Ion and Micron programs from sysex files to editable text files, and vice versa. The utility runs under Microsoft Windows, as well as on any operating system with Perl installed, such as Mac OS X and most Linux installations. Source code is included. Disclaimer: This program is given as specification for Ion/Micron programs. It is not a complete Ion/Micron program/librarian/editing solution. Please refer to the included readme.txt file for more information.
545 KBzip
ion setups v1.01
This file contains the 64 setups designed for the v1.01 sound banks
3 KBzip
ion Bank v1.01 - Red
Version 1.01 of the Red Bank
15 KBzip
ion Bank v1.01 - Green
Version 1.01 of the Green Bank
15 KBzip
ion Bank v1.01 - Blue
Version 1.01 of the Blue Bank
14 KBzip
ion Bank v1.01 - User
Version 1.01 of the User Bank
15 KBzip

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