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Ready to ship
55.000 Products
55.000 products
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Money Back
30 Day Return Policy
With the FOURM, Sequential presents a polyphonic analog synthesizer with SCI
The first thing that catches the eye is the visual proximity to the Prophet 5 and Pro One with a contemporary sonic character. Externally the FOURM closely resembles the classic Prophet 5, and its typical signal path of two oscillators with simultaneously selectable waveforms, mixer, lowpass filter, VCA, and envelopes has been retained and updated with thoughtful details such as an enhanced feedback circuit. The modulation options also go beyond those of the original P5, as the redesigned modulation bus from the SCI Pro One is integrated here. The 37 key slim keyboard features polyphonic aftertouch, allowing highly expressive performances. Its shortened keybed keeps the instrument extremely compact and lightweight at just 4 kg. The FOURM provides four voice polyphony, a powerful unison mode, and the option to play monophonically. Classic performance features include an editable arpeggiator and a polyphonic step sequencer. While the FOURM is impressive for its overall architecture, it is the modulation bus with aftertouch assignment that enables sounds far beyond what the 1978 Prophet could achieve.
The FOURM has four primary modulation sources. The two crisp ADSR envelopes are permanently assigned to the filter and VCA. The synchronizable LFO with four simultaneously activatable waveforms is assigned in the modulation bus. The (polyphonic) aftertouch section can modulate up to three destinations simultaneously, which are divided into the groups frequency OSC A/B, cutoff/amp, LFO frequency/amount.
The modulations are assigned on the left of the control panel. This is the modernized form of the modulation bus from the SCI Pro-One from 1981. The filter envelope, oscillator B and the LFO, each with its own attenuator, are available in parallel as sources. These are assigned to the targets Frequency Oscillator A+B, Pulse Width Oscillator A+B, Cutoff, Amp, LFO Frequency and LFO Amount via buttons. The color coding provides information about the modulation links. Red or blue means from one source to one or more destinations; purple has 2-3 modulation sources.
Used carefully, wild oscillator drifts, sync sounds, sirens, FM for filters and/or oscillator A as well as pulse width modulation are possible. Turn it all up at once and it gets really wild!
