CD+G
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CD+G is an extension of the compact disc standard that can present low-resolution graphics alongside the audio data on the disc when played on a compatible device. CD+G discs are often used for karaoke machines, which use this functionality to... Wikipedia
Capacity: Typically up to 800 MB (up to 80 minutes audio)
Extended from: CD-DA
Extended to: CD+EG
Read mechanism: 780 nm wavelength semiconductor laser
Standard: Red Book for audio
Usage: Audio with primitive visuals