Sequential Circuits Prelude

American Rebrand of Siel Orchestra 2 with different case color, sound the same

OVERVIEW C-C 49 keys with full polyphony, 32 sliders , 8 push buttons. No display.
The Prelude a 4-part string processor synthesizer with 4 sounds presets: Brass, Strings, Organ and Piano, of which up to two can sound at the same time.

RELATED MODELS:
- Siel Orchestra 2 the same, also known as OR400
- Sequential circuits FUGUE, similar design, another rebrand from SIEL CRUISE

Terminal connectors:

- main signal out HI LOW

- input signal

- tape Interface

- Volume pedal input

- pedal switch input decay

OSCILLATORS Divide-down tone generation, the 4 tone color families can be played individually or two can mixed.
Some section have some tweaks:

- Brass section with independent attack and sustain controls EG - cutoff and resonance

- String section (mute and percussion variations) with independent attack and sustain controls EG

- Reed section is 2-voice and offers a Celeste sound, accordion and musette.

- Piano section has two variations, traditional piano, Hony Tonk, clavichord sound.

Sequential Circuits Prelude Specifications

Model: Prelude

Brand: Siel / Sequential-Circuits dave Smith
Country: USA

Type: Analog

Synthesis: Subtractive
Year Released: 1983 Discontinued: 1986

Keyboard: 49 keys (C-C)
Polyphony: 49 notes

Patches Preset: 4

Equalizer (250, 500, 1000, 2000 and 4000 Hz)

LFO (speed, depth and delay)

Transpose (pitchbend)

Animator (=chorus) and Flanger effect

External audio input.

No CV/Gate in/out puts

Filters Low Pass, Resonance

LFO: 1 Simple set waveform LFO with depth and speed controls

Effects

Animator which is a flanger effect + EQ

Controls: Buttons, Faders, Switches

Display Type: NONE

Connections

Audio Output Connections: 1/4" Phone Jack, Stereo Main

CHIPS:
M086 TOS, TDA1008 6 stage divider
LM13700 dual OTA

Weight: NA

Dimensions: NA

Sequential Circuits Prelude

Overview

Sound