Digital Watchdog MEGApix DWC-MPTZ30X, User Manual, Page: 36 / 96

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3.6.4 Audio
The network camera can transmit audio to other clients using an external microphone and can play audio
received from other clients by attaching a speaker. The Setup page has an additional menu item called
Audio, which allows different audio configurations, such as full duplex and simplex.
• Audio Setting:
– Enable audio: Check the box to enable audio in the video stream.
– Compression type: Select the desired audio Compression format between G.711 µ-law and G.711
A-law.
– Sample rate: 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.
– Sound bit rate: Depending on the selected encoding, set the desired audio quality (bit rate). The
settings affect the available bandwidth and the required audio quality.
• Audio Input: Audio from an external line source can be connected to the STEREO Jack I/O of the
network camera.
– Input: User can select amplifier between Internal Amp and External Amp.
– Input volume: If there are problems with the sound input being too low or high, it is possible to
adjust the input gain for the microphone attached to the network camera.
• Audio Output:
– Enable full duplex: Check the box to enable Full Duplex mode. This means that you can transmit
and receive audio (talk and listen) at the same time, without having to use any of the controls. This
is just like having a telephone conversation. This mode requires that the client PC has a sound card
with support for full-duplex audio.
Uncheck the box enable Simplex mode. The simplex mode only transmits audio from the network
camera to any web client. It does not receive audio from other web clients.
– Output volume: If the sound from the speaker is too low or high it is possible to adjust the output
gain for the active speaker attached to the network camera.
When the settings are complete, click Save button to save the settings, or click Reset button to clear all of
the information you entered without saving it.