Quick Start
  
    Tap Start to enable audio. Drag the three ring handles to shape the sound:
    Outer=Cutoff (bright/dark), Middle=Q (resonance), Inner=LFO Rate (movement).
    Open MENU for Delay / Reverb / Phaser / Harmonics / Tremolo / Automation. Tap Pause to stop.
  
  Rings & Markers
  
    - Drag a handle to change its value. Focus = brighter arc/handle.
 
    - Start (green) & End (amber) markers set the motion window used by
        Automation → Ping modes (the app prevents zero-length windows).
 
  
  Panels (MENU)
  
    - Delay: Time, Feedback, Mix, Sync (to BPM), Tap Tempo.
 
    - Reverb: Global Mix.
 
    - Phaser: On/Off, Rate, Depth, Mix.
 
    - Harmonics: On/Off, Test, Boost +6 dB, Solo, Octave bias, HP Sweep, Level,
        Presence (~480 Hz), Tone (high shelf), Randomness.
 
    - Tremolo / Repeater: Master On/Off, Shape (SINE/SQUARE).
        Per-ring sections (Cut/Q/LFO) each have On/Off, Rate (Hz), Depth (0–0.5 arc).
 
    - Automation: On/Off. For Cutoff/Q/LFO: Rate (°/s; negative = reverse) and Mode
        (Wrap loops full circle, Ping bounces inside markers). Reset Phases realigns motion.
 
    - Note: Choose root (C–B) and Octave ±. The drone retunes smoothly without clicks.
 
  
  HUD & Halo
  Center badge shows actions (e.g., “Audio: Running”). The halo glows with output level.
  Gestures
  
    - Drag handles to set values; Drag markers to resize Ping range.
 
    - Tap MENU for panels; Swipe down the sheet’s grab bar to close.
 
  
  Troubleshooting
  
    - No sound? Turn volume up; press Start again (mobile needs a tap).
 
    - Harsh? Lower Cutoff, reduce Harmonics Tone/Presence, or Phaser Mix.
 
    - Boomy? Enable HP Sweep in Harmonics, or lower Harmonics Level.
 
    - Choppy? Close heavy tabs/apps; lower Reverb Mix / Delay Feedback.