PipeWire is described as 'project that aims to greatly improve handling of audio and video under Linux. It provides a low-latency, graph based processing engine on top of audio and video devices that can be used to support the use cases currently handled by both PulseAudio and JACK' and is an app in the System & Hardware category. There are four alternatives to PipeWire for Linux, Windows, Mac, BSD and Xfce. The best alternative is JACK Audio Connection Kit, which is both free and Open Source. Other great apps like PipeWire are PulseAudio (Free, Open Source), Advanced Linux Sound Architecture (Free, Open Source) and GStreamer (Free, Open Source).
JACK is a professional sound server daemon that provides real-time low latency connections for both audio and MIDI data between applications that implement its API. The API can be used through either JACK1 or JACK2.
PulseAudio is a sound system for POSIX OSes, meaning that it is a proxy for your sound applications. It allows you to do advanced operations on your sound data as it passes between your application and your hardware.
GStreamer is a library for constructing graphs of media-handling components. The applications it supports range from simple Ogg/Vorbis playback, audio/video streaming to complex audio (mixing) and video (non-linear editing) processing.