Digital audio media (Red Book standard): According to the original Compact Disc (CD) specifications, how many minutes of audio can a standard CD hold? Include the standard continuous-play capacity defined by the CD-DA (audio CD) format. Choose the correct duration.

Given data

• Asked: Standard audio capacity of an original-spec audio CD.

Concept/Approach
The Red Book (CD-DA) specification defines a standard playtime of approximately 74 minutes (about 74 min 33 s) for a 120 mm disc at 44.1 kHz/16-bit stereo.

Reasoning
• 80-minute discs exist but were introduced later as a higher-capacity variation.• The canonical original capacity is ~74 minutes.

Final Answer
74 minutes