Installing either version is straightforward. If after 30 days you decide not to purchase ACID Pro, you’ll need to uninstall the demo and install ACID XPress instead. The ACID Pro 6.0 demo is recommended to learn the basics of mashup construction. There is a 30-day demo of ACID Pro 6.0 on the CD-ROM, which should give you enough time to familiarize yourself with its features and decide for yourself which version is best for you. Even if eventually you opt to use the XPress version, which Sony gives away for the low, low price of free, it’s a good idea to start with ACID Pro. However, it contains features not available in other versions which are useful in learning mashup construction. ACID Pro is the most frequently used version of the software, but carries a large price tag. Sony provides several versions of ACID at varying price points. In many ways, ACID has helped to spur the mashup revolution, and has long been the mashup artist’s tool of choice. Soon ACID introduced beatmapping, the use of tempo and beat placement information, to handle longer sound files while independently manipulating tempo and pitch. In early versions of the software, you could only drop in wav files that were pre-cut into repeatable loops.

ACID, formerly from the company Sonic Foundry, started out as a loop-based music construction tool.

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