It offers a powerful sound engine; twice as much built-in memory as its predecessor, the DR660; and 4 times as much memory as other compact drum machines in its price range. The DR-770 also incorporates such great features as new patterns; expanded sound-shaping controls; 400 presets and 400 user patterns including rock, pop, fusion, jazz, Latin, dance, world, and standard styles. 64 preset drum kits and hundreds of individual drum sounds are available. A huge 100,000-pattern memory gives you plenty of room. Built-in effects include 5 types of reverb, 2 types of flange, and 2-band EQ. New ambient control permits 16 global choices for overall drum sound. A Quick Search function allows easy pattern locating by musical category. It's a cutting-edge, high-quality machine for a price that is amazingly affordable..