Its built-in sound library is based on PCM data and has a variety of instruments such as pianos, organs, strings, and synths. Frequently used sounds can be stored for quick access with the Favorites function, which allows you to recall up to 64 patches with four banks of 16 buttons. Korg's EDS-i sound engine allows you to create new sounds by using up to 7 of its built-in effects simultaneously; 5 as inserts on your sound and 2 as master effects. The Kross-61 features a built-in stereo audio recorder that can track not only your performance on the Kross but vocals as well, thanks to the 1/4" mic input. Your recordings can be tracked to optional SD cards. The Kross-61 has a lightweight, 9.48-pound body and can be powered by either 6 AA batteries or with the included AC adapter.