ljudmiddleware

Ljudmiddleware is a software library that provides a consistent abstraction layer between audio applications and the underlying hardware and operating systems. Its goal is to enable efficient, low-latency audio processing, reliable routing of streams, and straightforward integration of effects and plugins across environments. The term blends 'ljud' (sound in several Nordic languages) with 'middleware'.

Architecturally, ljudmiddleware typically includes an audio engine, a plugin host interface, a timing and scheduling subsystem, and a platform abstraction layer. It may offer thread management, buffer handling, sample-accurate timing, and error reporting. The design aims to be extensible so developers can add new backends or plugin formats without changing application code.

Typical features include a low-latency audio path, multi-channel support, synchronization with external timelines such as video or game loops, and portability across operating systems. Plugin format compatibility and API access enable loading effects and virtual instruments from other hosts. Some implementations also provide MIDI routing and automation data handling.

The term is not tied to a single, universally adopted specification, and public documentation varies by project. It commonly appears in discussions of audio software architecture, game audio middleware, or research platforms rather than as a formal standard.

Typical use cases include real-time game audio, digital audio workstations, live performance setups, and academic research in audio processing and synchronization.

See also: Audio middleware, Plugin host, Digital signal processing.