|Developed by the same team of engineers behind the Alesis Andromeda analog synthesizer, the Alesis ION features a 500 MIPS processor (500 million instruction per second), continuously variable wave shapes plus sync and FM synthesis. 16 filter types are included, along with two LFOs, sample & hold and 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 modulation matrix is built in, as well as a 40 band vocoder. The ION's 512 user-rewritable presets cover a variety of genres, including many exciting new tonalities, as well as classic synth emulations.
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 NRPMS (Non-Registered Parameter Numbers). A 160x160 graphic display provides visual feedback on the most recent controller in use.
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, stereo master multi-FX processor, and an internal universal power supply.