User`s guide

46 007-4403-003
3: System Configuration
Identifying Audio Ports
The vtrhwinfo command provides detailed information regarding the configured
video and audio ports. The command lists the installed PCI-VIDAUD-MSB-B
peripherals and their audio channel interfaces.
The following is sample output from the vtrhwinfo command:
Merlin Port 1 - PCI-VIDAUD-MSB Video (module=001c01 xtalk=14 slot=1)
Merlin Port 2 - PCI-VIDAUD-MSB Video (module=001c01 xtalk=14 slot=2)
Merlin Port 3 - PCI-VIDAUD-MSB Video (module=001p02 xtalk=12 slot=1)
Merlin Port 4 - PCI-VIDAUD-MSB Video (module=001p02 xtalk=12 slot=2)
Merlin Port 5 - PCI-VIDAUD-MSB Video (module=001p02 xtalk=15 slot=1)
Merlin Port 6 - PCI-VIDAUD-MSB Video (module=001p02 xtalk=15 slot=2)
Line 3 of the output indicates that the board (Merlin Port 3) resides in the PE brick
module (denoted by the p in the module value as opposed to c for a compute brick), on
bus 12, and in slot 1.
For example, to record two audio channels (one analog, the other embedded AES) using
the MFCODEC_14 port from the MSB-REARPANEL-B connected to IN 1/L and AES
INPUT 1, edit the file /usr/vtr/config/device-defaults/MFCODEC_14 and add
these control settings:
vtr.media.audio.input.channels 2
vtr.media.audio.input.channel_map.source “AE”
vtr.media.audio.input.channel_map.channel_pair “12”
Disabling Audio
If no audio inputs are connected, it is good practice to disable the controls for audio input
sources and mapping. To do this, use the MVCP SET command within the unit context,
as shown in the following session, which assumes that U2 is created from MFCODEC_3:
UADD MFCODEC_3 * EXCL *
U2
200 OK
SET U2 MED vtr.media.audio.input.channel_map.channel_pair ““
200 OK
SET U2 MED vtr.media.audio.input.channel_map.source ““
200 OK
SET U2 MED vtr.media.audio.input.channels 0
200 OK