For maximum mixdown flexibility, the contributors have made every effort to provide audio ‘raw’, in other words without additional effects or processing (beyond treatments printed during tracking/editing). All these projects are presented as ZIP archives containing uncompressed WAV files (24-bit or 16-bit resolution and 44.1kHz sample rate).
To support readers of my book Mixing Secrets For The Small Studio, as well as music-technology students/educators in general, here’s a list of multitrack projects which can be freely downloaded for mixing practice purposes.