Spire is analog / digital superiority, and the developer's framing of its purpose is clear: prove that soft-synths can sound amazing — Spire is a polyphonic software synthesizer that combines powerful sound engine modulation and flexible architecture, and a graphical interface provides unparalleled usability. Spire is the embodiment of the best opportunities, within software and hardware synthesizers. Reveal Sound, founded in 2009 by musicians and programmers, states its purpose as constantly improving our algorithms to achieve the perfect result.

Its architecture is documented in detail and is the reason it holds a place in many producers' setups: 4 completely identical, multimode polymorphing oscillators covering Classic, Noise, FM, AMSync, SawPWM, HardFM, and Vowel modes; a unique unison engine with 9 unison voices on each oscillator, able to spread unison voices by chords and octaves and capable of imitating different types of unisons like supersaw and hypersaw — which is why Spire became a staple of trance and psytrance; 4 macros, 4 envelopes, and 4 LFOs with morphing shapes; and 15 matrix slots, each equipped with two sources and four targets. There are also 2 steppers and an arpeggiator, plus X-Comp (a multiband compressor) and a 3-band EQ to make your sounds fatter. It includes five independent effects modules: Shaper, Phaser, Chorus, Delay, and Reverb, each with effect-specific controls and a Dry/Wet knob, and its chorus includes a J8 mode where the sound is similar to the chorus in the JP8000 hardware synthesizer. It supports microtuning with Scala tuning files, with Equal Tempered by default and A4=432 Hz, known as Verdi's 'A', or Pythagorean tuning also available. Platform support is Windows 7 to Windows 11 (32/64-bit) with modern Intel or AMD processors required, and macOS 10.15+ with Intel or Apple M1, in VST, VST2/VST3, AU, AAX, and CLAP formats, and it supports Ableton Live, Bitwig, Cubase, Logic Pro, Pro Tools, Reaper, and Studio One. Camera note: download and try the demo before buying is the developer's own counsel. A fully functional demo with one limitation — noise every 30 seconds — is available. Purchases include a multi-device license, free plug-in updates, constant factory preset updates, and an educational discount, with Spire + Sound Bundle and Spire Only tiers including 1000+ factory sounds. It suits trance, psytrance, synthwave, hard dance, and electronic production.

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