ABU is designed from the ground up to be the most versatile bass virtual instrument available today with a new level of expressiveness. ABU not only performs as an extraordinary acoustic instrument by playback partially from mic samples, but also as an electric instrument by playback partially from DI samples, creating a more dynamic and subtle playing experience. Furthermore, users can mix and process Mics and DI separately to get a variety of sound. ABU Also includes the built-in tab player, which can load all popular tabular formats, as well as the "riffer"  adjusting your basslines to the desired genre through a large selection of presets. Different from any other product of Ample Sound, ABU's slide mechanism is designed specifically for fretless instrument which can reproduce the smoothness of fretless legato with any duration, speed, pitch and polyphony.