Felicity

Features

Custom Audio Engine

Dual Decoder utilizing both hardware and software decoding through FFmpeg.

Custom DSP: The entire audio processing chain (EQ, Bass, Reverb) is written in C++ via JNI. It utilizes ARM NEON SIMD auto-vectorization to process audio arrays with absolute minimum CPU overhead.

Supports bass, treble and more.

Native downmixing support to pass multichannel audio to stereo output.

Advanced Effects: Integrated spatial effects including stereo widening and tape saturation for an analog feel.

10-band Equalizer: A powerful equalizer with 10 adjustable frequency bands up to +/-15 dB with dedicated PreAmp support.

Gapless Playback: Seamless transition between tracks without any gaps or interruptions.

High-Resolution Audio Support: Support for high-resolution audio formats such as FLAC, ALAC, and DSD for audiophile-grade sound quality.

Multi-Channel Audio Support: Support for multichannel audio formats like 5.1 and 7.1 surround sound for an immersive listening experience.

Milkdrop Visualizer: Twin buffer enabled Milkdrop visualizer support powered by a native DSP, rendering on GL surface at native fps in real-time.

User Interface

Fully custom-built and highly optimized interface inspired by Inure App Manager.

Dynamic Theming: The app's theme dynamically adapts to the album art of the currently playing track, creating a visually cohesive and immersive experience.

Custom Animations: Smooth and visually appealing animations throughout the app, enhancing the user experience and making interactions more engaging.

Themes: Multiple themes including light, dark, AMOLED black, Material You and others.

Core: Predictive back, edge to edge and adapted to all modern Android UI features.

Embedded Lyrics: Reliable, on-the-fly LRC extraction and support for online downloading from LrcLib.

Dual Fast Scroll: Simultaneous support for both slide to scroll and jump to letter fast scroll.

Realtime Audio Visualizer: A lock-free, zero-allocation visualizer rendering on the Canvas at native fps, powered by a native PFFFT implementation.

Library Management

Realtime Library Updates: The app automatically detects and updates the music library in real-time as new tracks are added or removed from the device adapted from Peristyle app.

All Storage Support: Full support for both internal and external storages including SD cards and USB drives.

Auto Scanning: The app automatically scans for new music files and updates the library without requiring manual refreshes.

Server Mode: Host Felicity as a local server to create a central music library for all local and possibly remote devices through Wi-Fi.

Smart Core

True Randomized Shuffle: Choose between Miller and Fisher-Yates shuffle algorithms.