S/PDIF C Channel Information
Byte 0
Bit 0: 0: S/PDIF
1: AES/EBU (ignored by consumer equipment)
Bit 1: 0: Digital Audio
1: Non-audio (ignored by consumer audio equipment)
Bit 2: 0: SCMS enabled (default state)
1: SCMS disabled (this allows unlimited generation digital copying)
Alternating at 4-10Hz and Category 1000000 (CD):
CD is copy of an original work - disallow recording
5 4 3 Preemphasis
-----------------------------------
0 0 0 None - 2 channel audio
0 0 1 50/15us - 2 channel audio
0 1 0 Reserved - 2 channel audio
0 1 1 Reserved - 2 channel audio
1 - - Reserved - 4 channel audio
7 6 Mode
------------
0 0 Mode 0
-- - Reserved
Mode defines the meaning of bytes 1 to 3. It is likely the other modes would
be rejected by consumer audio equipment.
Byte 1 - Category codes, and 'L' generation bit
8 9 10 11 12 13 14 Hex Category
--------------------------------------------------------------------------------
0 0 0 0 - - - 00-0F Reserved
0 0 0 0 0 0 0 00 General
0 0 0 0 0 0 1 02 Experimental
0 0 0 1 - - - 10-1F Solid state memory [Do MPMans have S/PDIF out?]
0 0 1 - - - - 20-3F Broadcast digital audio
0 0 1 0 0 0 0 20 - Japan
0 0 1 0 0 0 1 22 - Electronic software delivery
0 0 1 0 0 1 1 26 - United States
0 0 1 1 0 0 0 30 - Europe
0 1 0 - - - - 40-5F Digital / digital converter
0 1 0 0 0 0 0 40 PCM encoder / decoder
0 1 0 0 0 1 0 44 Digital sound sampler
0 1 0 0 1 0 0 48 Digital signal mixer
0 1 0 1 1 0 0 58 Sample rate converter
0 1 1 0 0 - - 60-67 A/D converter without SCMS
0 1 1 0 1 - - 68-6F A/D converter with SCMS
0 1 1 1 - - - 70-7F Broadcast digital audio
1 0 0 - - - - 80-9F Laser optical
1 0 0 0 0 0 0 80 CD - compatible with IEC908
1 0 0 1 0 0 0 90 CD - IEC908 incomp. (Mag/Opt) [is this CD-RW?]
1 0 0 1 0 0 1 92 MiniDisc
1 0 1 - - - - A0-BF Musical instruments, microphones
1 0 1 0 0 0 0 A0 Synthesiser
1 0 1 1 0 0 0 B0 Microphone
1 1 0 - - - - C0-DF Magnetic tape or disc
1 1 0 0 0 0 0 C0 DAT
1 1 0 0 0 0 1 C2 DCC
1 1 0 1 0 0 0 D0 Digital audio sound VCR
1 1 1 - - - - E0-FF Reserved
For categories 001---- (broadcast), 0111---- (broadcast) and 100---- (laser optical):
bit 15=0: Original / Commercially pre-recorded data
bit 15=1: No indication / 1st generation or higher
For the other categories
bit 15=0: No indication / 1st generation or higher
bit 15=1: Original / Commercially pre-recorded data
Byte 2: Source and channel
19 18 17 16 Source
-------------------------------
0 0 0 0 Unspecified source
0 0 0 1 Source 1
0 0 1 0 Source 2
: : : : :
1 1 1 1 Source 15
23 22 21 20 Channel
--------------------------------------------------
0 0 0 0 Unspecified channel
0 0 0 1 Channel A (Left in 2 channel format)
0 0 1 0 Channel B (Right in 2 channel format)
0 0 1 1 Channel C
: : : : :
1 1 1 1 Channel O
Byte 3: Sample rate
27 26 25 24 Sample frequency Fs
-------------------------------------------
0 0 0 0 44.1kHz
0 0 1 0 48kHz
0 0 1 1 32kHz or sample rate converter
- - - - Reserved
29 28 Clock accuracy
---------------------------------
0 0 +/- 0.1% (default)
0 1 +/- 0.005% (high accuracy)
1 0 Variable pitch
1 1 Reserved
Bits 30 and 31 are reserved
Bytes 4-23 are reserved
Most of this information was gathered from Application note
AN22 (pdf format) from Crystal Semiconductor: www.crystal.com