Axis P1343 User Manual page 20

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.
Notes:
• To prevent unauthorized listening, the internal microphone can be disabled by inserting a plug in the Audio in
connector.
• The internal microphone on AXIS P1343-E and AXIS P1344-E cannot be used.
The Enable microphone 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 impedance dynamic microphone, do not enable microphone power. Microphone power will not harm the
microphone; if you are uncertain, try switching it off and on. To use a professional microphone 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 Encoding format, G711 μ-law, G726 or AAC.
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.
Changing the Bit rate changes the audio compression level and hence audio quality. A higher bit rate can improve audio
quality but requires more bandwidth.
The network camera can be configured to trigger an event if the incoming sound level rises above, falls below, or passes the
set Alarm level.
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 Reset to revert to previously saved settings.
Note:
To receive synchronized video in H.264 and audio, it is recommended that the time settings in the camera and client
computer are synchronized with an NTP Server. This is enabled in the camera under System Options > Date & Time.
Please refer to the help pages for more information.
AXIS P1343/-E/AXIS P1344/-E - Video & Audio
20