Spire

Spire by Reveal Sound is a polyphonic software synthesizer for producers who want expansive unison leads, punchy basses, atmospheric pads and crisp plucks. Its four multimode oscillators cover classic waveforms, noise, FM and vowel textures, with up to nine unison voices per oscillator for thick supersaw-style sounds or layered chords and octaves. Two multimode filters blend analogue-style character with digital shaping, while built-in delay, reverb, chorus and distortion help finish patches without extra effects. Sound designers can explore four envelopes, four LFOs, two steppers and a flexible modulation matrix; an arpeggiator adds movement to melodic ideas. For quicker inspiration, Spire includes over 1,000 factory presets, plus RS AI preset generation based on your chosen timbre. It suits hobby producers looking for ready-to-play electronic sounds alongside plenty of room to build their own.