Zulu DJ is probably the best free alternative to professional programs to mix live music, not only due to the quality of its audio engine and how simple it is to handle the program, but also for all the tools to process music that it integrates.
A free alternative to mix music
The program has two independent players (compatible with MP3, WMA, ASF, MPC, VOX, RAW, AIFF and WAV, among other formats), automatic BPM counter (despite also including a manual TapTempo) and a two channel mixer.
The application's main feature is the effect processor that each of the players include, thanks to which we can make the most of distortion, filters, reverb, flanger, phaser and delay, to modify the signal in real time. Furthermore, each effect includes independent parameter controllers and additive functions, so that we can apply various simultaneously.
Mix music like a professional.
If you entered the world of digital audio mixing not so long ago, and you're looking for a free tool with the features of a professional application, Zulu DJ is an option to be taken into account.