User`s manual

18
AXIS P1311 - Video & Audio settings
Audio Settings
This section describes how to configure the basic audio settings for the network camera.
The audio functionality is enabled under Video & Audio > Video Stream > Audio.
Audio Channels
Audio mode - The Half duplex mode transmits and receives audio in both directions, but only in one direction at a time. To
speak, press and hold the button (check that the microphone is not muted). To receive audio, release the button.
Note:
The push-to-talk butt
on is configured from AMC (see AXIS Media Control (AMC), on page 13). It is possible to config-
ure the push-to-talk button so that it toggles between the speaking and listening modes.
With the S
implex - Network Camera speaker only option, the speaker connected to the camera plays audio, but no audio is
transmitted from the camera to other web clients. This could be used to provide spoken instructions to a person seen in the
camera. This mode requires you to use the push-to-talk button.
The Sim
plex - Network Camera microphone only mode transmits audio only from the network camera to web clients. It does
not receive audio from other web clients. This can be used in remote monitoring, and web attractions, to provide live audio
and video, of a monitored situation.
Audio Input
An external microphone or a line source can be connected to the Audio in the connector of the network camera. If an external
microphone or line source has been connected, the internal microphone will be automatically disconnected. The audio source
must be set to Microphone or Line depending on the connected device.
Note:
To
prevent unauthorized listening, the internal microphone can be disabled by inserting a plug in the Audio in connec-
tor.
The Enable mi
crophone power option provides DC power for an external microphone. If using a small electret condenser
microphone such as a clip-on microphone or a PC microphone, enable this option.
Note:
To use a high imped
ance dynamic microphone, do not enable DC power. DC power will not harm the microphone; if
you are uncertain, try switching it off and on. The default value is DC power enabled. To use a professional micro-
phone requiring 48V phantom power, you need an external power supply and a balanced-unbalanced converter (audio
transformer) in between.
If the sound input is too low or too high, adjust the input gain for the microphone attached to the network camera.
Select the desired audio En
coding format, AAC, G711, G726.
Select the required Sample rate (number of times per second the sound is sampled). The higher the sample rate, the better the
audio quality and the greater the bandwidth required.
Depending on the selected encoding,
set the desired audio quality (Bit rate). These settings affect the available bandwidth and
the required audio quality.
The network camera can be set to trigger an event if the incoming sound level rises above,
falls below, or passes the set value.
The Alarm level is set between 0-100%.
Audio Output
If the sound from the speaker is too low or too high, adjust the output gain for the active speaker attached to the network
camera.
When satisfied with the settings, click Save, or click Re
set to revert to previously saved settings.