MusicPlayerDaemon/MPD

Features

• Audio Playback - Acts as a headless server that streams audio to centralized devices for remote management.
• Music Servers - Runs as a headless background service that indexes music libraries and streams audio to outputs.
• Music Library Managers - Provides a system for indexing audio files and extracting metadata into a searchable database for rapid music retrieval.
• Playback Queues - Allows adding, deleting, moving, or clearing songs in the current sequential playback sequence.
• Audio Metadata Indexers - Indexes audio file metadata tags from local storage to create a searchable music library database.
• Media Metadata Indexes - Implements an indexed database that allows fast retrieval of song metadata and relational attributes like genres.
• Music Library Indexing - Indexes audio files from local directories to create a searchable database of the music library.
• Relational Music Indexing - Indexes audio files from local and remote sources to enable fast searching and filtering.
• Audio Codec Decoders - Parses various compressed and lossless audio formats into raw waveforms for playback.
• Sample Rate Conversion - Ensures compatibility between audio files and hardware through sample rate resampling.
• Local Media Access - Provides the ability to read and stream audio files directly from the server's local filesystem.
• Network Media Access - Indexes and searches large collections of music stored on local disks or remote network file systems.
• Playback Transport Controls - Manages basic transport actions including play, pause, stop, seek, and track skipping.
• Playlist Management - Allows the creation and storage of named track lists for future retrieval and playback.
• Networked Audio Synchronization - Synchronizes audio output across multiple networked clients and hardware devices as a coordinator.
• Remote Control Protocols - Implements a dedicated text-based protocol for remote playback management and library queries.
• Playback Controllers - Provides a dedicated network protocol for managing playback, playlists, and library queries from remote clients.
• Remote Playback Control - Manages player states and organizes playlists through a remote protocol to operate the system from separate devices.
• Text-Based Communication Protocols - Provides a request-response text-based protocol for remote management of the music library and playback.
• Playlist Managers - Includes tools for creating, editing, and organizing named persistent media playlist files.
• Non-Destructive - Manages arbitrary name-value pairs for songs and playlists without modifying original files.
• Local Artwork Discovery - Fetches album covers by searching for standard image files within the song directory.
• Playlist Integrations - Integrates remote playlist files via plugins, treating them as virtual directories in the library.
• Audio Cross-fading - Implements seamless audio transitions by overlapping the end of one track with the start of the next.
• Audio Hardware Routing - Sends audio streams to output plugins using hardware mixers and software volume controls.
• Bit-Perfect Playback - Offers bit-perfect playback by bypassing resampling and volume modification to preserve original signal integrity.
• High-Fidelity - Ensures high-fidelity sound through bit-perfect output, sample rate conversion, and loudness normalization.
• Audio Plugin Architectures - Utilizes a modular plugin architecture to integrate various audio decoders and hardware output drivers.
• Level Normalization - Adjusts audio levels using normalization and tags to ensure consistent loudness across different tracks.
• Stream Metadata Retrieval - Retrieves real-time song titles and artist information from active audio streams.
• Real-Time Audio Threading - Uses high-priority threading to ensure time-critical audio calculations prevent buffer underruns and skipping.
• Hardware Audio Streaming - Sends audio streams to physical soundcards using native audio drivers and interfaces.
• Configurable Filter Chain Pipelines - Provides a configurable chain of audio filters to perform processing tasks like software volume control.
• Playback Partitions - Provides isolated playback instances with independent queues and outputs while sharing a common music library.
• Audio Output Configurations - Configures audio output with customizable formats and mixer types for hardware devices or network streams.
• Audio Data Caching - Prefetches queued songs into memory using memory-mapped loading to reduce playback interruptions.
• Audio Effect Chains - Employs a chain of software filters to resample and normalize audio before output.
• Cue Sheet Playbacks - Parses CUE sheets to identify track boundaries and gaps for accurate playback.
• Remote Audio Streaming - Fetches and plays audio files or streams from external network URLs in real-time.
• Advanced Filtering - Provides an advanced search engine for music libraries supporting regular expressions and complex logical operators.
• Pub-Sub Systems - Pushes real-time system events and status changes from the server to all connected remote clients via a pub-sub mechanism.
• Audio Streaming Servers - Broadcasts audio streams over HTTP and forwards them to external servers like IceCast and ShoutCast.
• Playback State Persistence - Saves the current playback position and queue to allow session restoration after a restart.
• Audio Streaming - Daemon for remote music playback and playlist management.
• Media Players - Client for controlling Music Player Daemon instances.
• Media Streaming - Listed in the “Media Streaming” section of the Awesome Selfhosted awesome list.
• Music Players - Server-side music player daemon.

Star history