Akoustik Piano is a virtual instrument developed by Native Instruments for both the Mac OS X and Windows XP platforms. It uses a large collection of audio samples taken from three grand pianos (Steinway concert grand piano model D, Bösendorfer 290 "Imperial", Bechstein D 280) and one upright piano (Steingraeber 130.)
The software used for playback is Native Instruments' own Kompakt player/synthesizer (a watered-down version of Kontakt), which is used as a stand-alone program for live performance or recording to MIDI. Additionally it may be used as a plug-in for a digital audio workstation (such as MOTU's Digital Performer.)
The Kompakt synthesizer includes several optional transformations to the sample's sound. Pitch level, pitch bend, velocity curve, tuning system (including quarter-tone), dynamics, microphone distance, equalizer, lid position (closed, half-, or full-stick) as well as choice of performance space may all be modified.
Virtual Studio Technology (VST), Audio Units, RTAS, DXi, Audio Stream Input Output (ASIO), Apple Computer's Core Audio and Microsoft's DirectSound are all supported. Akoustic Piano is now a Macintosh Universal Binary.