SQ1

• Synthesis Type: Digital ROMpler with sample-based waveforms and transwave elements

• Keyboard: 61 velocity-sensitive keys

• Polyphony: 21 note maximum (some variants have different polyphony)

• Multitimbral: up to 24 parts

• Preset Sounds: ~100 ROM sounds + 80 editable user sounds

• Sequencer: Built-in 8-track (+ sequencer song mode)

• Effects: Internal stereo digital effects (reverb, chorus, delay, etc.)

• Filters: Dual multimode digital filters per voice

• Storage: 3.5″ DSDD floppy drive, cartridge support, and MIDI SysEx for patch storage

• MIDI: Full MIDI IN/OUT/THRU

• Outputs: Stereo outputs plus auxiliary outputs, headphone jack

• Build: Menu-driven LCD interface with sliders and buttons for editing

Key Points

• The SQ-1 is essentially a cost-reduced sibling of Ensoniq’s higher-end VFX and SD series workstations, sharing much of the core sound engine but with fewer bells and whistles.

• It’s known for its rich sample-based sounds, flexible sequencing, and built-in effects, making it a classic early workstation keyboard from the transition era between purely sample-based synths and integrated music workstations.