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Sequential Circuits | Model 800 |
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Description | The Sequential Model 800 Sequencer is a 256-event cv/gate sequencer based on microprocessor technology. This was probably Sequential's first product. Dave Smith started making these units in his garage. Early serial numbers even feature a strange sci-fi looking Sequential logo. It was built like a tank, encased in a 8"X10"X5" metal box. It represents one of the first attempts at a commercial meld between analog and digital technology. The 800 consists of 16 toggle switches which enable "cells". Each cell can hold up to 16 note-events each. The cells are loaded from CV (control voltage) keyboard via the CV/gate inputs (1 volt per octave) and can be programmed over a 5-octave range. The Gate is switchable between S-trigger and voltage gate. An internal clock runs from 20Hz up to 5kHz to calculate absolute note length or beat division if being driven externally by a low frequency clock. External input is provided via a specially wired plug. A multi-pin parallel connector is used to hook two or more 800's together. A foot-pedal was available for toggling between record and play modes and start/stop. The CV/gate output is quantized to semitones (1/12). The gate can also be switched between S-trigger and voltage gate. Sequences cannot be stored, however there may have been a battery backup modification. If a hi freq VCO is used to "clock" the sequencer, it can function as a crude audio waveshaper. |
| Brand | Sequential Circuits |
| Model | Model 800 |
| Device | Misc |
| Type | Desktop |
| Engine Type | Sequencer |
| Engine | Sequencer |
| Engine Detailed | Digital sequencer |
| Sequencer | 16 banks of 16 step sequences allowing up to 256 notes and ability to save them. |
| Keys | 0 |
| Key type | N/A |
| Velocity | N/A |
| Aftertouch | N/A |
| CV-gate | CV/Gate I-O |
| Produced: | 1975 - 1975 |
| 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. | |||
