A modern, privacy-first offline music player for Android powered by a high-performance native C DSP audio engine.
Or download the latest APK directly from the Releases Section:
arm64-v8a(Recommended for most modern 64-bit Android phones and tablets)armeabi-v7a(For older 32-bit ARM devices)x86_64/x86(For Android emulators, ChromeOS, and Intel/AMD devices)universal(All architectures bundled in a single APK)
- Ultra-Low Latency Core: Audio processing is implemented in native C (
app/src/main/cpp/) for maximum performance, real-time response, and zero garbage-collection jitter. - Dual Filter Architectures:
- Biquad IIR Filters: High-precision, zero-latency parametric equalizer filters.
- FFT FIR Filters: 2048-point Fast Fourier Transform linear-phase filtering for transparent acoustic response without phase distortion.
- Master Soft Limiter: Integrated stereo-linked peak tracking with a smooth tanh curve to eliminate harsh digital clipping.
- Stereo Spatializer: Native stereo widening virtualizer that expands your soundstage.
- Stereo Delay: Configurable delay time, feedback decay, and ping-pong stereo crossfeed.
- Studio Effects: Reverb, Chorus, Flanger, and Polyphony effects with optimized DSP algorithms.
- Independent Dry/Wet Mix: Every audio effect includes a dedicated
DryWetMixSliderto fine-tune the exact proportion of processed sound.
- Real-Time Signal Flow View: Located directly beneath the album cover art, inspect the end-to-end signal path:
- Track Info: Audio format, sample rate, channel count, bit depth, and bitrate.
- Decoder: Active audio codec (MediaCodec / ExoPlayer).
- Resampler: Real-time sample rate conversion status.
- DSP Engine: Filter mode (Biquad IIR vs FFT FIR) and soft-limiter status.
- Audio Sink: Output routing, buffer specifications, and sink sample rate.
- Tap any section to view technical telemetry or jump directly to audio engine settings.
- Matrix Digital Rain: Character fall rate, glow intensity, and density dynamically react to real-time audio frequencies.
- 32-Band Audio Spectrum: Real-time FFT audio spectrum visualizer with logarithmic frequency distribution and smooth peak falloff.
- Fullscreen & Landscape Mode: Switch to a dedicated fullscreen visualization view with landscape lock and screen keep-awake toggle.
- Cover Bounded Mode: In standard portrait view, visualizers are cleanly contained within the album artwork boundaries.
- Dual Coarse & Fine Sliders: Coarse steps (0.1x) and ultra-fine adjustments (0.01x) for playback speed (0.25x – 3.0x).
- Pitch Shifting: Independent pitch adjustment with high-fidelity time stretching.
- Smooth Auto-Scroll: Active lyric lines automatically smoothly center in the view.
- Drag-to-Seek Navigation: Seek directly to any point in the song by dragging along lyric timestamps.
- Word-Level Dictionary Popup: Tap any word in the lyrics to open a dictionary lookup popup with support for multiple dictionary providers and auto-dismiss settings.
- Universal Formats: Supports embedded lyrics (ID3/Vorbis/MP4) as well as external
.lrc,.vtt,.srt, and.txtfiles.
- Dedicated Video Tab: Play local video files directly in the player's dedicated Video tab.
- Battery-Saving Background Playback: Automatically switches to audio-only playback when minimized or navigating away from the Video tab to conserve battery.
- Full DSP Audio Processing: Native C equalizer, spatial effects, audio filters, and visualizers apply seamlessly to video soundtracks.
- Open Settings (⚙️) from the top app bar.
- Scroll to the Video Support toggle and turn it on (available when compiled with video support enabled).
- Grant the Videos media permission when prompted by Android.
- Return to the main screen — local video files will appear in your library and a dedicated Video tab will be active on the Now Playing screen.
- Privacy-First Design: MonsterMusic strictly adheres to user privacy. By default, the app only asks for audio permissions (
READ_MEDIA_AUDIO/READ_EXTERNAL_STORAGE) so it never accesses your personal photos or videos without explicit intent. - Android 13+ Granular Permissions: Starting with Android 13 (API 33), Android separated media storage into distinct permissions (
READ_MEDIA_AUDIO,READ_MEDIA_VIDEO,READ_MEDIA_IMAGES). TheREAD_MEDIA_VIDEOpermission is required by the Android OS exclusively to scan and play local video files. - 100% Offline & Private: MonsterMusic has no network permissions, no internet access, zero analytics, and zero tracking. Your media files never leave your device.
- Fully compatible with Material Design 3 and Android 12+ dynamic colors (Monet).
- Multiple customizable themes and accents to match your personal aesthetic.
- Operates completely without network access.
- No ads, no telemetry, no tracking, and no unnecessary permissions.
- UI Framework: Jetpack Compose with Material Design 3
- Audio Engine: AndroidX Media3 (ExoPlayer) + Native C DSP via JNI
- Native Build System: CMake
3.22.1+ Android NDKr30(30.0.16248370) - Database: Room with Kotlin Symbol Processing (KSP)
- Concurrency: Kotlin Coroutines & StateFlow
- Image Loading: Coil 3
- Android Studio Ladybug (or newer)
- JDK 17
- Android SDK Platform 37
- Android NDK
30.0.16248370(r30) - CMake
3.22.1
# Clone the repository
git clone https://github.com/ZTFtrue/MonsterMusic.git
cd MonsterMusic
# Build Debug APK
./gradlew assembleDebug
# Build Release APK
./gradlew assembleReleaseThe compiled APK will be located in app/build/outputs/apk/.
- Discord: Join our community on Discord to discuss features, report issues, and chat.
- Crowdin: Help translate MonsterMusic into your language on Crowdin.
- Support the Project: Read I need your help.
MonsterMusic is licensed under the Apache License 2.0.