(1) Sound waves that have been sampled, digitized and stored in the computer. Common formats are music CDs, MP3, WAV and AIFF, and software-based players play the largest variety of audio formats (see media player). Musical Instrument Digital Interface (MIDI) Although digital, the MIDI format differs from all other digital audio formats. MIDI files contain a coded version of the musical score, not the actual sound (see MIDI). Contrast with analog audio. See CD-DA, MP3, codec examples and S/PDIF.
(3) See digital CD audio.