Product Price Polyphony (voices) Oscillators Count Filter Types Modulation Sources Sequencer Arpeggiator
Arturia AstroLab 61
US
£926.39 48 voices

The AstroLab 61 is a 61-key semi-weighted stage keyboard with aftertouch, multiple sound engines, over 1,800 onboard presets, built-in effects, an arpeggiator, chord and scale modes, and a MIDI looper. It suits live performers and studio musicians who want a broad library of piano, organ, sampled, and synthesizer sounds in a standalone instrument.

★ Ideal for

It suits players seeking a quiet polyphonic synthesizer because its semi-weighted keybed uses a felt layer to soften key impacts, while piano and organ sounds provide up to 48 voices of polyphony.

Sequential Fourm
US
£571.73 4 voices 2 per voice 4-pole resonant low-pass LFO, filter envelope, amp envelope, modulation wheel, polyphonic aftertouch, sequencer

The Sequential Fourm is a compact 4-voice analog synthesizer with two oscillators per voice, a Prophet-style 4-pole resonant low-pass filter, and polyphonic aftertouch. Its hands-on modulation matrix, arpeggiator, and polyphonic sequencer suit players who want expressive analog sounds for studio work, live performance, basses, leads, and chord patterns.

★ Ideal for

The Fourm suits this question because its 4-voice polyphony and resonant 4-pole low-pass filter support quiet, controlled chordal sounds, while polyphonic aftertouch enables subtle per-note expression without requiring louder playing.