Help
Audio Settings
Audio input
Select the audio input.
Audio Input "In 1 + In 2, Line" is only possible for MPEG1 encoding formats
Default setting: "In 2, Line".
Microphone type
Select Dynamic or Condenser microphone. When Condenser microphone is selected phantom power is automatically switched on.
Default setting: "Dynamic".
Microphone supervision
When supervision is switched on the microphone, dynamic or Condenser, connected to the input, will be supervised.
The result of the supervision is shown on the status page.
On the Supervision Mapping page the Local and Remote Fault response can be selected.
Default setting: "Off".
Microphone gain
Select gain for the microphone input.
Default setting: "0" dB.
Line gain
Select gain for the line input.
Default setting: "0" dB.
Pilot Tone supervision
When supervision is switched on the 20 kHz Pilot Tone on Audio input 2 will be supervised.
The result of the supervision is shown on the status page.
If this setting is enabled the status of the pilot tone is provided in the header of any audio streams transmitted.
A receiving device can use this information to control its own Pilot Tone output.
On the Supervision Mapping page the Local and Remote Fault response can be selected.
Pilot Tone supervision Default setting: "No".
Loop Input to Output
Select "Yes" to route the audio input signal direct to the local audio output.
(For testing only, feedback may occur when using a speaker).
Loop Input to Output always applies to a "Half Duplex" connection.
Default setting: "No".
Audio Output
Output level
Select the Output level.
Default setting: "0" dB.
Output delay
Defines the delay before playing the received stream.
The maximum delay depends on the audio coding format used.
In the "Half Duplex" mode the max. values are:
- PCM 24kHz (16bit) about 1.3 second
- 8kHz G.711 about 8 seconds
In the "Full Duplex" mode the max. values are:
- PCM 24kHz (16bit) about 0.65 second
- 8kHz G.711 about 4 seconds
To prevent dropouts in the audio signal the default setting is "64" mSecs.
Audio format
Encoding
Select encoding type (audio compression) and sampling frequencies.
From "MPEG1-L3 / 48 kHz" down to "MPEG1-L2 / 16 kHz" and "uLaw", "aLaw" or "PCM" at 24 or 8 kHz.
Default setting: "PCM / 24 kHz (16bit)".
MPEG Encoding Quality
Choose between "0 lowest" and "7 highest" in steps of 1.
The Encoder Quality table below shows the average bit rate in kbit/s for the quality settings and sampling frequencies in kHz.
Default setting: "7 highest".
Qual. |
44.1 |
22.05 |
0 |
65 |
35 |
1 |
68 |
38 |
2 |
73 |
40 |
3 |
80 |
45 |
4 |
90 |
50 |
5 |
105 |
60 |
6 |
125 |
75 |
7 |
140 |
90 |
Audio coding
For PCM, uLaw and aLaw "Full Duplex" or "Half Duplex" can be selected.
Select Half Duplex to take full advantage of the receiver play buffer in order to set up longer audio delay times.
(MPEG formats are always Half Duplex)
Default setting: "Full Duplex".
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