Version 6.0 was a watershed moment. It added robust multitrack recording, VSTi (Virtual Studio Technology instrument) support, and a vastly improved MIDI sequencer. Before version 6, ACID was a "loop arranger." After version 6, it became a full-fledged production suite.
Carry your preferred DAW, custom layouts, and project files on a USB drive to use on any compatible computer. Portable Sony ACID Pro 6.0 build 355
While earlier versions focused on "pick, paint, and play" loop composition, ACID Pro 6.0 introduced architecture for professional music production: Version 6