Lightware MX-FR Series

 MX-FR Series Modular Matrix Frames – User's Manual 106
<audio> block
INFO: This block is present only if a valid video signal is present on the selected port.
The audio info block determines the type of the audio, the decoded sampling frequency and some further

Format: A<a><b><c><d><ee><ff>
 Parameter Description Parameter Values
<a> Audio type
0 = no audio data is present
1 = PCM audio
2 = Compressed audio
4 = High bitrate audio
<b> Sampling frequency
A = 44.1 kHz
C = 48 kHz
D = 32 kHz
E = 22.05 kHz
G = 24 kHz
I = 88.2 kHz
J = 768 kHz
K = 96 kHz
M = 176.4 kHz
O = 192 kHz
B = no information
<c>
Audio codec type

cases)
0 = undetermined
1 = IEC 60958PCM
2 = AC3
3 = MPEG-1 (Layers 1&2)
4 = MP3 (MPEG-1 Layer 3)
5 = MPEG-2 (multichannel)
6 = AAC
7 = DTS
8 = ATRAC
9 = One Bit Audio
A = Dolby Digital
B = DTS-HD
C = MLP
<d> Audio channel number
0
1..7 = channel number is equal to (<d>+1)
<ee>
Sampling frequency and
sample size (encoded
in HEX format and
represented by binary
format)
7-5 bits:
reserved and shall
be 0 (zero)
4-2 bits:
000
001 = 32 kHz
010 = 44.1 kHz
011 = 48 kHz
100 = 88.2 kHz
101 = 96 kHz
110 = 176.4 kHz
111 = 192 kHz
1-0 bits:
00 
01 = 16 bit
10 = 20 bit
11 = 24 bit
example:
0F = 000 011 11
48 kHz sampling frequency and 24 bit sample length
<ff>
Speaker locations
(See the following table
for the possible values)
This byte describes how various speaker locations are
allocated to the audio channels:
FR/FL 
LFE = Low-frequency effect
FC/RC 
RR/RL 
FRC/FLC 
RRC/RLC 
 A1C010000

INFO: Please note that the values of <c>, <d>, <ee> and <ff> parameters are based on the audio info frame
sent by the source device while values of <a> and <b> are based on measurements. Audio info frames are

to interpret the InfoFrames correctly.
Speaker locations
<ff> value
Channel Number
8 7 6 5 4 3 2 1
00 FR FL
01 LFE FR FL
02 FC FR FL
03 FC LFE FR FL
04 RC FR FL
05 RC LFE FR FL
06 RC FC FR FL
07 RC FC LFE FR FL
08 RR RL FR FL
09 RR RL LFE FR FL
0A RR RL FC FR FL
0B RR RL FC LFE FR FL
0C RC RR RL FR FL
0D RC RR RL LFE FR FL
0E RC RR RL FC FR FL
0F RC RR RL FC LFE FR FL
10 RRC RLC RR RL FR FL
11 RRC RLC RR RL LFE FR FL
12 RRC RLC RR RL FC FR FL
13 RRC RLC RR RL FC LFE FR FL
14 FRC FLC FR FL
15 FRC FLC LFE FR FL
16 FRC FLC FC FR FL
17 FRC FLC FC LFE FR FL
18 FRC FLC RC FR FL
19 FRC FLC RC LFE FR FL
1A FRC FLC RC FC FR FL
1B FRC FLC RC FC LFE FR FL
1C FRC FLC RR RL FR FL
1D FRC FLC RR RL LFE FR FL
1E FRC FLC RR RL FC FR FL
1F FRC FLC RR RL FC LFE FR FL
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