Tonebox — Equalizer & DSP

Tonebox is a precise, system-wide audio equalizer and dynamics processor built on Android's native DynamicsProcessing engine. Shape the sound of any app — music, video, games, podcasts — across your speaker, wired headphones, or Bluetooth. No bloat. No ads. No accounts. Just clean, powerful audio control. ━━━━━━━━━━━━━━━━━━ PARAMETRIC EQUALIZER ━━━━━━━━━━━━━━━━━━ • 8 fully adjustable bands • Filter types: Bell, Low/High Shelf, Low/High Pass, Notch, Band Pass • Drag points directly on the response curve • Three views: Parametric curve, Graphic sliders, and a precise Table editor • Per-band frequency, gain, and Q control ━━━━━━━━━━━━━━━━━━ DYNAMICS PROCESSING ━━━━━━━━━━━━━━━━━━ • 3-band multiband compressor (Low / Mid / High) • Per-channel peak limiter to prevent clipping • Adjustable crossover frequencies ━━━━━━━━━━━━━━━━━━ SMART FEATURES ━━━━━━━━━━━━━━━━━━ • Auto-Preamp: loudness-matched gain so toggling EQ doesn't change perceived volume • Per-device presets: bind a preset to a headphone or speaker, and it switches automatically when that device connects • Live spectrum visualizer • Quick Settings tile to toggle EQ from anywhere • Import AutoEQ / Equalizer APO preset files • 9 built-in presets (Bass Heavy, Vocal Boost, Rock, Electronic, and more) • Save unlimited custom presets ━━━━━━━━━━━━━━━━━━ PRIVATE BY DESIGN ━━━━━━━━━━━━━━━━━━ • 100% on-device processing • No data collection, no analytics, no ads, no network access • Open about every permission it uses Tonebox requires Android 9 (Pie) or newer. Note: System-wide audio effects depend on your device's audio hardware. Some manufacturers restrict third-party audio processing; behavior may vary by device.