Spectryx:Synth

A pocket synthesizer for ambient producers, sound designers, and anyone who likes an instrument that rewards exploration. Spectryx fits a feature-full spectral-harmonic additive synth engine, a galaxy-themed sequencer, and a deep experimental FX rack into a single Android app, with enough depth that new sounds keep turning up every time you load it up. Built for anybody looking to make noise.

Platform: Android. Verified price: $1.99.

Screenshots

Spectryx synth engine screen with seven crystal-shaped synthesis type selectors, a formant spectrum display, and an audio-reactive icosahedron visualRollerball modulation screen in Spectryx showing a glowing geodesic sphere modulator above the starfield sequencer gridSpectryx effects rack with 21 effect tiles and the Eigengrau infinite convolution reverb selected on a ring of experimental DSP effectsEuclidean and step sequencer in Spectryx: a spiral galaxy star map with pattern, rotation, seed, orbit, and gravity controls at 120 BPMSpectryx tuning panel with a chromatic root note circle set to E Locrian, scale lock, octave shift, and knobs for echo, fade, drift, and resonanceConstellation sequencer grid in Spectryx with celestial trigger bodies placed across a starfield and loop lanes in the transport bar

Features

  • 4-voice additive synthesis, 64 harmonics per voice (adaptive shedding to 32 on weaker devices)
  • Native C++17 Oboe audio engine, 48 kHz exclusive mode, ARM NEON SIMD batch rendering
  • Spectral Morph Strip: 7 synthesis types crossfaded on a 2D control surface (X = type, Y = depth, pinch-to-zoom up to 8×)
  • 21 effects: 12 complex DSP processors, plus 9 primitive FX each with dual modes reshaping
  • LinnStrument-style 12×10 grid in perfect fourths, 4-voice multi-touch, A1 to A6 range, haptic feedback on note crossings
  • Tuning panel: chromatic root-note circle, scale lock, ±2 octave shift, optional percussion-to-synth tuning lock
  • Constellation Sequencer: STEP and Euclidean engines, 5 step directions, 5 polyrhythmic arms with rate ratios from 2/3 to 3/2, full BPM, swing, gate, velocity, tonality, and density faders. 32 celestial triggers drag-placable with unique sounds and generative seed mode to randomize sequences
  • Engine Cortex visuals: 3D morphing icosahedral organism with audio-reactive vertex displacement, nested counter-rotating cube and octahedron, energy tendrils, multi-touch lightning arcs
  • Harmonic Sigil Globe: 80-point Fibonacci geodesic sphere for direct per-harmonic amplitude control with paint mode, friction control, and odd/even/both harmonic selection
  • Store up to 99 presets capturing all parameters in both the synth and sequencer engines.
  • Per-control automation: every parameter records onto its own 1-minute lane with looping and per-voice time offsets
  • Settings overlay with independent synth and percussion gains, display alpha, optimisation mode, haptic toggle, and a built-in guided tutorial that walks every control once and is replayable at any time
  • Fully offline: no network calls, no telemetry, no tracking, no ads
  • ⚠ An unstable singularity has been observed in the sequencer starfield. Investigate at your own risk. ⚠
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