Apple Mac Pro (Early 2008) - Manual (Page 91)

Chapter 5 What’s Under the Hood 91
Optical Digital Audio Specifications
 Data format: Sony/Phillips Digital Interface (S/PDIF) protocol (IEC60958-3)
 Connector type: TOSLINK optical (IEC60874-17)
 Bits per sample: 16-bit or 24-bit
Optical digital audio out
Based on a typical situation with playback of 1 kHz, 0dBFS 24-bit sine wave, 44.1 kHz
output sample rate, unless otherwise specified below.
 Output sample rate: 44.1 kHz, 48 kHz, or 96 kHz
 Signal-to-noise ratio: Greater than130 dB
 Total harmonic distortion + noise: Less than -130 dB (0.00003 percent)
Optical digital audio in
Based on a typical situation with playback of 1 kHz, 0dBFS 24-bit sine wave, unless
otherwise specified below.
 Input sample rate: 44.1 kHz, 48 kHz, or 96 kHz
 Signal-to-noise ratio: Greater than130 dB
 Total harmonic distortion + noise: Less than -130 dB (0.00003 percent)