TETSUO

Chaotic Percussion Machine

USD 5.99

TETSUO is a chaotic percussion machine. No samples, no library. One voice built out of a pitched body with noise dragged through it, a resonant filter that saturates the harder you lean on it, a bitcrusher, and a waveshaper that runs from a bit of weight to total structural failure. The sequencer is sixteen unseen slots and STEPS knob decides how many of them fire, adding and taking away hits one at a time in a fixed order, so you can strip a pattern to the bone and build it back and the same beats come home. The SKIP control works against you on purpose, stealing hits at random while it plays, so it never quite settles. MUTATE modulates the pitch at random, setting fire to voices on every turn. You do not program TETSUO so much as negotiate with it. The strip along the top is how you attempt to hold onto anything. Sixty four steps, four turns of pattern, carved into as many as eight sections. Select a section. Find a sound. Hit RECORD, and that section keeps every knob position. Change it, record the next, then hit PLAY and it walks left to right dropping each snapshot in as it reaches it, looping. Drag the dividers to give a section longer or cut it short. It keeps settings, not audio, so the engine is playing live the entire way through. Sections save with your presets and your session. Fifteen factory presets to start from, and your own saved alongside them. A preset stores the knobs and the whole arrangement together. Tap the round gauge in the middle for presets, settings and the manual. AUv3 plugin and standalone app. Follows host tempo and transport, twelve automatable parameters, full MIDI control, factory and user presets, and a manual built into the app.

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NEW SOUND ENGINE: The top of the PITCH range no longer glides. Every hit used to fall three or four octaves whatever the tuning, which is exactly what you want from a kick and exactly what you do not want from anything above it. The drop now scales with pitch, so the low end is untouched and the high end holds its note. The square range has been rebuilt as struck metal rather than one raw square, so it sits properly under a reversed filter for hats and snare tops. Your old work is safe. Anything saved before this update keeps the sound it was made with. There is a CLASSIC switch in the new settings tab if you want to hear a new patch the old way, or drag an old one up to date. FIFTEEN PRESETS: PIT HEAD, BOILER HOUSE, IRON FILINGS, SCRAP LINE and eleven more, sitting above your own in the gauge menu. Load one, wreck it, save it under a name of your own. ALSO: A settings tab for the engine switch, background audio and muted sections.

The developer, Anthony Moran, 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.

    Privacy practices may vary based, for example, on the features you use or your age. Learn More

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Provider
    Anthony Moran
    Size
    30.5 MB
    Category
    Music
    Compatibility
    Requires iOS 15.6 or later.
    • iPhone
      Requires iOS 15.6 or later.
    • iPad
      Requires iPadOS 15.6 or later.
    • iPod touch
      Requires iOS 15.6 or later.
    Languages
    English
    Age Rating
    4+
    Copyright
    © 2026 Anthony Moran