The Kawai XD-5 is a percussion synthesizer based on the Kawai K4 sample playback (but uses 16-bit 44.1 kHz sample rate as opposed to 32 kHz ) with filter and AM amplifier modulation synthesis architecture. It is essentially a Kawai K4r with percussion waveforms, plus faster envelopes, gate mode and amplifier to better suit percussion sounds. The XD-5 also features include 32 digital oscillators each capable of using one of 256 available 16-bit waveforms, a digital filter with self resonance and 8 individual outputs.