SpectralLab
Spectral Harmony, Hands-On
$4.99 · Designed for iPad. Not verified for macOS.
Hear the harmonic series, not just read about it. Analyze real audio, build spectral chords, and study the composers who pioneered the technique.
SpectralLab is a hands-on toolkit for spectral harmony in the Grisey/Murail tradition. Explore the harmonic series as a playable drone, record or import real sound and decompose it into its partials with on-device FFT analysis, then sculpt spectral chords with breathing LFOs and a Hammond-style drawbar interface — sounded either through a pure additive synth or a 16-band EQ run through your own recording.
Chain chords into step sequences, export MIDI with microtonal pitch bend preserved, and study the technique through interactive references to the composers who pioneered it — tap "Try it" on Stockhausen, Grisey, Scelsi, or throat-singing tradition and hear the idea instantly, not just read about it.
Whether you're a composition student studying spectral music or a sound designer who wants to hear harmonic ratios instead of just reading about them, SpectralLab turns the math of the overtone series into something you can see, hear, and play.
• Harmonic series visualizer with true-pitch playback against a drone
• Record/import audio, analyzed via on-device FFT — no data ever leaves your device
• Drawbar chord builder: True Harmonic vs. Equal Temperament A/B toggle
• Per-partial LFOs, pencil-draw mode, and a live harmonograph-style visualization
• Step sequencer for chord progressions, synth or real-audio EQ playback
• Standard MIDI export with pitch bend preserving true tuning
• Theory tab: interactive references to Stockhausen, Grisey, Murail, Scelsi, Harvey, Partch, and more
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The developer, Martin Adler, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
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Information
- Seller
- Martin Adler
- Size
- 1.7 MB
- Category
- Music
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - iPad
Requires iPadOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Martin Adler
