Sonoma Wire Works develops products that help musicians enjoy playing, recording and sharing music. iOS products include GuitarJack Model 2, GuitarJack 2 USB, FourTrack, GuitarTone and InstantDrummer (iPhone/iPod touch) and StudioTrack (iPad). MacOS and Windows products include RiffWorks recording and online music collaboration software, DrumCore and KitCore plug-ins and drum loops, DrummerPack drum loop library of celebrity drummers, and the Discrete Drums multitrack drum loop library.