A notable addition is the PerfectSpace convolution reverb (see Fig. 4), which comes with numerous impulse files that simulate spaces as diverse as cathedrals, mine shafts, and the inside of a piano. (See the article ???Trading Spaces??? on the EM Web site, at www.emusician.com, for the rundown on convolution for reverb and other purposes.)All in all, Sonar 5 represents a solid upgrade.