User manual
VIVOTEK
74 - User's Manual
Media > Audio
Audio Settings
Mute: Select this option to disable audio transmission from the Network Camera to all clients. Note 
that if muted, no audio data will be transmitted even if audio transmission is enabled on the Client 
Settings page. In that case, the following message is displayed:
External microphone input: Select  the  gain  of  the external audio  input  according  to  ambient 
conditions. Adjust the gain from 0% to 100%.
Audio type: Select audio codec and the sampling bit rate .
■ G.711  also provides good sound quality  and requires  about 64Kbps. Select pcmu (μ-Law)  or 
pcma (A-Law) mode.
■ G.726 is a speech codec standard covering voice transmission at rates of 16, 24, 32, and 40kbit/
s. 
When completed with the settings on this page, click Save to enable the settings.










