Lynx Mixer Reference
3. The Clock Source was selected when the AES16
e
card was being accessed by some software
application. In this case, the Preferred Clock Source will become the Current Source when the
card is no longer being accessed. If “Allow Clock Change if Active” is selected from the Lynx
Mixer Settings > Advanced menu, then a new Preferred Clock Source can become the Current
Source while the card is being accessed from a software application.
e
Digital Input Status Section
This section displays status information pertaining to the AES16
e
’s eight AES inputs. The data displayed
indicates the quality of the AES/EBU connections as well as channels status data sent by a transmitting
device. The information displayed in this section is very useful for troubleshooting digital input connection
issues. For more information about AES/EBU channel status data, refer to the AES-3 specification
available from the Audio Engineering Society web site at
Lock
Locked (green)
Indicates the digital receiver is locked to a valid AES/EBU source
Unlocked (gray)
Indicates the digital receiver is not locked to a valid AES/EBU source
When the Unlocked indicator is shown, all of the fields to the right will be blank.
Validity
Valid (green)
Indicates the Valid channel status bit is set
Invalid (red)
Indicates the Valid channel status bit is not set
The Valid bit is set by a transmitting device to indicate the validity of the audio data being transmitted. A
DAT machine for example may mark the data as invalid when it is not in play mode.
Parity
OK (green)
Indicates accurate transmission of audio data
Error (red)
Indicates an audio data error occurred during transmission
The parity bit is included in the AES/EBU data stream to validate the transmission of audio data. A parity
error indicates an audio data error was cased either by the transmitting device or the connecting cables.
CS CRC
OK (green)
Indicates valid transmission of channel status data
Error (red)
Indicates a transmission error in the channel status data
This indicator represents the state of Channel Status Cyclic Redundant Check used to validate the
transmission of the channel status data embedded in the AES stream. An error indicates a channel status
data error was caused either by the transmitting device or the connecting cables. Some devices do not
transmit CS CRC. In this case an error will be displayed, but the audio data can still be transmitted without
errors.
Type
This indicator represents the type of data stream being transmitted by the external device. The external
device indicates type using specific bits in the channel status data. Typically PCM types are shown with
green background and non-PCM types, such as Dolby AC3, have a yellow background.
AES16e User Manual
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