Mixxx

Mixxx provides a full‑featured DJ environment for Windows, macOS and Linux, allowing users to mix digital music files with tools such as BPM and key detection, automatic beat‑matching, and a lock‑sync function that aligns the tempo of up to four tracks. It supports a range of hardware, offering built‑in mappings for many DJ controllers and a programmable system for adding MIDI or HID devices, as well as timecode vinyl control for turntable‑style scratching and passthrough of physical records.

The software includes a suite of audio effects that can be chained and manipulated in real time, and it integrates with music libraries, including iTunes, to streamline track selection. Users can broadcast live sets over the internet directly from the application. Development is driven by a global community of DJs and programmers; the code is open source and freely available, with no commercial entity steering its roadmap. Updates focus on stability, controller mapping improvements, and expanded effect capabilities.