Using sample rates of 44.1 kHz, 48 kHz, or 96 kHz when connected to the optical digital audio input may correct this condition.
Certain optical digital audio source sample rates may not work for some Intel-based Macs
When connected to the optical digital audio input, 32 kHz (kilohertz) and 88.2 kHz audio input sample rates may not work on Intel-based Macintosh computers. The audio may be damaged or non-existent.
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