librespot-org/librespot

Features

• Remote Playback Receivers - Implements a virtual playback endpoint that accepts external control commands to manage music streaming.
• Spotify Client Libraries - Provides a comprehensive library for building custom applications that authenticate and stream from Spotify.
• Audio Hardware Routing - Directs audio streams to various system sound servers and hardware outputs for cross-platform playback.
• Audio Streaming Engines - Functions as an engine for fetching, decoding, and routing remote audio streams to system backends.
• Audio Playback Engines - Provides the engine required to play remote audio streams through various system backends.
• Cross-Platform Audio Engines - Utilizes platform-specific audio engines to support various architectures and minimize latency.
• Streaming Clients - Implements the client-side logic necessary to fetch and consume audio streams from a remote music service.
• Remote Playback Targets - Implements the ability to register as a remote target for discovery and control by other music clients.
• Spotify Connect Implementations - Implements the Spotify Connect protocol to function as a remote-controllable playback device.
• User Identity Verification - Verifies user identities via interactive browser flows and third-party provider tokens.
• Token-Based Authentication - Verifies user identity through interactive browser flows and manages scoped access tokens.
• Virtual Device Endpoints - Implements a virtual playback device that functions as a software-only logical endpoint for remote control.
• Local State Caches - Persists encrypted audio data and authentication credentials locally to reduce network latency and maintain sessions.
• Audio Mixing - Controls playback volume through software-based mixing or direct hardware integration.
• Audio Processing - Provides real-time sound manipulation by routing audio through custom processing pipelines.
• Processing Pipelines - Implements a sequence of modification stages for audio normalization, dithering, and gain adjustment.
• Music Source Integrations - Integrates a remote music service to enable streaming playback via various system backends.
• Headless Playback Clients - Supports running a streaming service on a remote server as a background process without a GUI.
• Audio Output Configurations - Configures audio output bit-depth and formats to balance playback quality and performance.
• Audio Volume Controls - Adjusts audio levels using stream-provided gain values to ensure consistent loudness.
• Media Playback Controls - Provides standard APIs for managing playback states such as play, pause, and track skipping.
• Embedded Audio Streaming - Enables the integration of music streaming into low-power hardware or custom embedded operating systems.
• Device Instance Registrations - Registers a device instance for discovery so remote music applications can find and control playback.
• Local Network Discovery - Uses standard network discovery protocols to locate compatible hardware on the local wireless network.
• Network Device Discovery - Uses network protocols to automatically identify and register compatible playback targets on a local area network.
• Audio Output Pipelines - Provides an architecture for routing processed audio streams to various software or hardware output drivers.
• Music Streaming - Open-source client library for Spotify.

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