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Alesis S4 QuadraSynth Plus Rack

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    Description
    The Alesis S4 Plus QuadraSynth is a 64 voice, rackmount MIDI sound module featuring built-in parallel-matrix digital signal processing. The 64 has a large, easy-to-read, back-lit LCD display for "Composite Synthesis," which is an innovative combination of subtractive and additive synthesis.

    Each program can be made up of as many as four individual "sounds" each with their own set of 3 envelope generators, 3 LFO's, tracking generator, dynamic low pass filter, and very comprehensive modulation matrix.

    In the "Program Mode," the S4 Plus has 128 present and 640 user programs in which the user can program up to 7 simultaneous effects which can be independently assigned to any of four effect busses. This allows different programs or composite sounds to be routed to different effects with dynamically controllable amounts.

    In the "Mix Mode," the S4 Plus has an additional 100 preset and 500 user programmable "Mixes" which can be used for multi-timbral sequencing applications. In this mode, different programs may be assigned to each of the 16 MIDI channels simultaneously, and have allows you to have separate discrete effects on different sounds with complete mix control. That's why we call it "Mix Mode" rather than a simple multipatch.

    Programs may be routed to any of the four audio output jacks on the back and the S4 Plus supports optional Sound cards.
    Images
    Architecture
    Type: Digital
    Synthesis: ROM
    Oscillators: 4
    Waveforms: ROM
    ROM Size: 20
    ROM Resolution: 16 bit, 48 kHz
    Osc Modulation: Continuous Controller, Envelope, Keyboard, Knob, LFO, Mod Wheel, Oscillator, Pitch Wheel, Glide / Portamento
    Envelopes: 3
    Evelope Paramerters: Delay, Attack, Decay, Sustain, Release
    Filters: 1
    Types: 12dB Slope (2-pole), Low Pass
    Filter Modulation: Envelope, Keyboard, Knob, LFO, Mod Wheel
    LFO: 3
    LFO Parameters: Noise, Saw Up, Saw Down, Sine, Square, Triangle, Delay, Key Sync
    Polyphony & Tuning
    Polyphony: 64
    Timbrality: 16
    Tuning: Standard
    Patches
    Patches RAM: 128
    Patches ROM: 640
    Multipatches RAM: 100
    Multipatches ROM: 500
    Storage: Internal, RAM Cartridge
    Editing: MIDI
    Effects
    Up to 7 effects per patch based on QuadraVerb 2 chip set.
    Case
    Case: Rack
    Case Details: 1U 19 inch rack
    Controls: Knobs
    Connections
    Audio Output Connections: 1/4" Phone Jack, ADAT, Stereo Main, Stereo 2, Stereo Headphone
    Audio Output Count: 8
    Inputs: ADAT, 48k Clock
    MIDI Ports: IN, OUT, THRU
    General MIDI: GM - General MIDI
    DAC Bits: 16
    DAC Frequency Rate: 48
    Power: 120V AC
    Production
    Year Released: 1995
    Used By
    Gary Numan
    Manuals & Documents
    Pricing
    MSRP List Price: $899 - convert
    Retail Street Price: $749 - convert
    Used Price: $75 - $150 - convert
    Shopping
    YouTube Videos
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