Synth DB

The Ultimate Synthesizer Database


Total list currently 2405 items in 330 Brands

Steiner-Parker | EVI Electronic Valve Instrument


The first generation EVI (Electronic Valve Instrument) is for wind players to play and control synthesizers. The early models also came with their own case with a dedicated synthesizer module with 4 switches and 5 knobs.

The original unit only sent one cv signal by blowing through the mouthpiece. The gate was triggered by the pressure of the player's air through a sensor in the mouthpiece. 

The mouth piece measured the air being blown through which did not actually flow through the instrument. A nice feature was the unit offered the same expression as a Trumpet the harder you blew the more dynamic the instrument was. 

The EVI had keys and switches like a real Trumpet with thumb rollers and a canister on one end. The player could adjust and play the key and octave of a connected synthesizer by rotating the cannister in combination.

In 1998, Nyle Steiner completed and made available the world's first MIDI EVI! The MIDI EVI is a totally self-contained, trumpet-style MIDI controller which outputs MIDI directly from the controller thus eliminating the need for an additional interface box.

After he did some improvements/fixes on AKAIs EWI instruments, in early 2004 Nyle Steiner traveled to Japan and delivered a new EWI prototype to the Akai Japan engineers. Nyle consulted with Akai on this project. This resulted in what became the new Akai EWI4000s which was based on his prototype.

ModelEVI Electronic Valve Instrument
TypeBreath controller
Engine TypeAnalog
Voices (max)1
Filter (VCF)Low Pass, Resonance
Envelope (VCA)Attack
Key typeN/A
CV-gateCV out
Produced:1975 - 1979
Legend: Obvious Y: Yes, N: No, N/A: Not Applicable
VCO Voltage Controlled Oscillator DCO Digital Controlled Oscillator
LFO Low Frequency Oscillator Sub Sub Oscillator
VCF Voltage Controlled Filter VCA Voltage Controlled Amplifier
Velocity As with a piano, the harder you hit a key, the louder the sound, unlike most organs which always produce the same loudness no matter how hard you hit a key. Aftertouch Pressing a key after you activated it. Channel Aftertouch, no matter which key, it will send a Channel message. Poly Aftertouch, sends the pressure per key instead of the whole channel.
Values for OSC, LFO, Filter, Envelope are per voice unless stated otherwise.

Manuals, patches etc.


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