DeciBoost is a modern Android volume booster that raises media playback loudness above the system 100% cap — without root. Built for YouTube, Spotify, Netflix, browsers, and any app that plays through Android’s standard audio mixer.
Unlike typical volume booster apps that lose boost after pause → resume, DeciBoost keeps working in the background with a lifecycle-aware audio engine tested on real devices (including Honor phones on Android 16).
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Android caps STREAM_MUSIC at 100%. DeciBoost uses LoudnessEnhancer and DynamicsProcessing on the global output mix (session 0) to increase perceived volume up to 200%, with safety prompts at high levels.
| Problem users search for | How DeciBoost handles it |
|---|---|
| YouTube volume too quiet after pause/resume | Re-detects playback and recreates stale audio effects |
| Volume booster stops when app is backgrounded | Foreground service keeps the engine alive |
| Boost lost on Honor / MediaTek / Android 14+ | OEM-tested release + recreate on playback events |
| Need louder Spotify / Netflix / podcast audio | Works on all media through the output mix — not one app |
- 200% max boost — slider from 100% to 200% with hearing-safety dialogs
- Survives pause and resume — YouTube, ReVanced, ExoPlayer/Media3 apps, music players
- Background reliability — foreground audio service + battery-opt-out onboarding
- Playback-aware engine —
AudioPlaybackCallback+isMusicActivemonitoring - Bluetooth & wired headphone support — re-applies boost on route changes
- Material 3 UI — Jetpack Compose, edge-to-edge, adaptive layouts for tablets
- Optional waveform visualizer — opt-in
RECORD_AUDIOfor live output feedback - Safe boot restore — notification to confirm boost after reboot (no silent auto-boost)
- Tested in CI — instrumented harness on emulators (API 26, 34, 36)
DeciBoost is not limited to YouTube. It boosts any audio routed through Android’s media output mix, including:
- Video: YouTube, YouTube ReVanced, NewPipe, Netflix, browsers (Chrome, Firefox)
- Music: Spotify, Apple Music, local players (VLC, Poweramp)
- Podcasts & streaming: Pocket Casts, Audible, web players
- Games with standard media audio output
Note: DRM-protected or mixer-bypass paths may not be boostable. Phone calls and voice chat (
USAGE_VOICE_COMMUNICATION) are intentionally excluded.
- You set boost (e.g. 150%) in the app.
- A foreground service attaches post-processing effects to session 0.
- A playback monitor watches for pause, resume, and config changes.
- On resume (or OEM stale-effect detection), the engine releases and recreates
LoudnessEnhancer, then re-applies gain within ~1.5 s. - A watchdog verifies the effect stays healthy while boost is active.
This fixes the common failure mode where boost looks enabled in software but disappears after the user pauses media — especially on Honor, MediaTek, and Android 14+ devices.
App store screenshots are pending for v0.2.0 (alpha).
| Minimum Android | 8.0 (API 26) |
| Target / tested | Android 16 (API 36) |
| Root | Not required |
| Permissions | Notifications (FGS), optional battery exemption, optional RECORD_AUDIO for visualizer |
Official sideload builds: Releases.
Signing & trust: Release APKs are signed with a private CI keystore stored only in GitHub Actions secrets (not in this repository). The signature means the APK was built by this project’s release pipeline. Older alpha APKs signed with a previously public test keystore are a different signing identity — updating from those may require uninstall + reinstall. Prefer building from source if you want full control over what you install.
git clone https://github.com/ayv4zyan/DeciBoost.git
cd DeciBoost
./gradlew assembleDebug
adb install -r app/build/outputs/apk/debug/app-debug.apkDebug package: com.deciboost.app.debug
- Complete onboarding (notifications + battery optimization exemption recommended).
- Set boost above 100%.
- Play media in any app — boost applies globally to media output.
Agent and contributor conventions (versioning, scope): AGENTS.md. A versionName bump on main triggers a tagged GitHub Release with a signed APK via release.yml. Release signing setup: signing/README.md. Latest build: Releases.
- Kotlin + Jetpack Compose + Material 3
- Hilt dependency injection
- DataStore preferences
- Modular architecture:
:core:audio,:core:domain,:feature:boost,:testing:audio-harness
./gradlew assembleDebug # Debug APK
./gradlew assembleRelease # Release APK (minified; signed only if local signing/ files exist — see signing/README.md)
./gradlew test # JVM unit tests
./gradlew detekt # Static analysis (all modules)
./gradlew :testing:audio-harness:connectedDebugAndroidTest # Emulator harnessBefore a release, walk through docs/spike-youtube-checklist.md on a real phone with YouTube installed and record results in docs/spike-signoff.md.
See also: DESIGN.md.
No. YouTube is the primary regression test because pause/resume is a known pain point. Boost applies to all media on the output mix — Spotify, Netflix, games, browsers, etc.
Many apps attach LoudnessEnhancer(0) once and never react when playback pauses or the AudioTrack is recreated. On some OEMs the effect handle goes stale. DeciBoost listens for lifecycle changes and recreates the effect.
Yes. A foreground service keeps the audio engine running while boost is active (persistent notification while engaged).
Boost above 100% can increase clipping and listening fatigue. DeciBoost shows safety warnings at elevated levels. Use headphones at moderate levels; prolonged max boost is not recommended.
No. DeciBoost uses public Android audio effect APIs only.
DeciBoost adds playback lifecycle monitoring, a foreground service, effect recreate on resume, automated tests, and a modern Compose UI. BoostX is a minimal Activity-scoped booster; DeciBoost targets reliable real-world usage on OEM devices.
DeciBoost/
├── app/ # Application shell, FGS, boot receiver
├── core/
│ ├── audio/ # Boost engine, playback monitor, effects
│ ├── domain/ # BoostController orchestration
│ └── data/ # DataStore preferences
├── feature/
│ ├── boost/ # Main boost UI
│ └── settings/ # Settings, onboarding, safety UX
├── testing/
│ ├── audio-harness/ # Instrumented pause/resume tests
│ └── scripts/ # Local emulator test helpers
└── docs/ # Privacy, spike checklist, Play declarations
Issues and pull requests are welcome on GitHub. See CONTRIBUTING.md and CODE_OF_CONDUCT.md.
| Document | Description |
|---|---|
| LICENSE | Apache License 2.0 |
| docs/PRIVACY.md | Privacy policy (local-only v1, no analytics) |
| CONTRIBUTING.md | How to contribute |
| CODE_OF_CONDUCT.md | Community standards |
Copyright 2026 Artur Ayvazyan. Licensed under the Apache License, Version 2.0.
Android volume booster · increase volume above 100% · loudness enhancer · media volume boost · YouTube volume booster · Spotify louder · pause resume volume fix · Honor volume booster · background volume booster · no root volume app · Android 16 volume · DynamicsProcessing · ExoPlayer volume boost
DeciBoost — louder media, even after pause and resume.