User manual

AXIS Q7424–R

Video and Audio

Half-duplex - Audio can b e transmitted in both directions between th e Axis product and the client computer, but only in one

direction at a time. You must actively receive sound using the Talk/Listen button v is ible in the Live View page (see

AXIS Media

Control viewer toolbar

). In Push-To-Talk mode, click and ho ld the button to speak and release it when done. In Toggle mod e, click

once to switch between speaking and listening. The Talk/Listen mode is conﬁgured from the Audio tab in the AMC control panel

(see A XIS Media C ontro l on

page 12

Simplex - Network Camera speaker only - Audio is transmitted from the client to the Axis product and played by the speaker

connected to the product. To send audio, the Talk and Microphone buttons in the AMC toolbar m ust both be enabled. Click either

button to stop audio tran smissio n .

Simplex - Network Camera microphone only - A udio captured by the microphone connected to the Axis product is tra nsmitted from

theproducttooneormoreclients.

For more information ab ou t these settings, please see the online help

Audio Input

Source - Select Microphone for an external microphone or Line for a Line in device, e.g. a n audio mixer for multiple microphones or

a microphone with a built-in am pliﬁer.

Microphone power - The E nable microphone po wer o ption provides DC power f or an external microphone. Microphone power

should only be used with microphones that have no battery. This setting should not be enabled when using a dynamic or battery

powered microphone. Microphone pow er 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 transform e r) in between.

Input gain - Control the volume (dB Full Scale) of the aud io input. If the sound is too low, choose a higher dB, to amplify the

sound. If the sound is too high, choose a lower dB. The Level bar gives a visua l representa tion 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 d istorted.

• Red — the signal is distorted.

Encoding - 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 r ecommended codec to use. A n AAC license

is included in the Axis pr oduct.

• G711

• G726

Sample rate - The number of tim es per second the sound is sampled. A higher sample rate will provide b ette r a udio quality, but

also requires a greate r b andwidth.

Bit rate - Set the required bit rate depending on the selected encoding. A higher bit rate will give better audio quality. A lower bit

rate m ay hav

e latency or delay, but will require less bandwidth.

For more

information about these settings, please see the online help

Audio Output

Conﬁgure the audio output settings under Video & Audio > Audio Settings.