AXIS P3915-R Mk II Network Camera
Video and Audio
How to change audio settings
To change the product’s audio settings, go to
Video & Audio > Audio Settings
.
To include the audio stream in a video stream, go to
Video & Audio > Video Stream
. Under the
Audio
tab, select
Enable audio
.
Each stream profile is a separate video stream. To include the audio stream in all stream profiles, go to the audio tab in each stream
profile settings page and enable audio. For more information, see
About stream profiles on page 19
If you have enabled view areas, remember that each view area is a separate video stream. To include the audio stream in all view
areas, go to the audio tab in each video stream page and enable audio. For more information see
.
Audio Input
An external microphone or a line source can be connected to the Audio-in connector. Configure the audio input settings under
Video
& Audio
>
Audio Settings
.
Note
If using unbalanced Line in a mono contact must be used. Signal on tip and ground on sleeve.
Select
Microphone
to use an external microphone or
Line
to use a Line in device, e.g. an audio mixer for multiple microphones
or a microphone with a built-in amplifier, as audio source.
Select the
+30 dB microphone boost
option to amplify the signal of the external microphone connected to the Axis product.
Microphone boost option is useful when a microphone's volume is too low and you want to increase it. This option is not available
when the Line source is selected
The
Microphone power
option provides DC power for an external microphone.
To use a professional microphone requiring 48V phantom power, you need an external power supply and a balanced-unbalanced
converter (audio transformer) in between.
Use the
Input gain
to control the volume of the audio input. If the sound is too low, choose a higher dB value, to amplify the
sound. If the sound is too high, choose a lower dB value. The
Level
bar gives a visual representation of the audio signal level in dB
relative to the full-scale input level.
•
Green — the signal is at a good level.
•
Yellow — the signal is becoming distorted.
•
Red — the signal is distorted.
Use the
Encoding
option to select digital audio encoding format.
•
AAC
requires a license for both encoding and decoding. AAC is the least complicated and most widely used codec. If
achieving the best possible audio quality is a priority, AAC is the recommended codec to use. An AAC license is included
in the Axis product.
•
G711
is an unlicensed standard codec that is useful when integrating audio into a VoIP system
•
G726
is an unlicensed speech codec that is most commonly used within the security industry.
Note
The
Sample rate
defines the number of times per second the sound is sampled. A higher sample rate will provide better audio
quality, but also requires a greater bandwidth.
Set the required
Bit rate
depending on the selected encoding. A higher bit rate will give better audio quality. A lower bit rate
may have latency or delay, but will require less bandwidth.
For more information about these settings, please see the online help
.
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