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The signal sample rate affects the quality of the audio signal and audio recording size. The higher the audio signal sample rate, the higher the signal quality and, hence, the efficiency of real-time and post-event analysis. When the audio signal sample rate increases, the size of the audio stream, transmitted by the network to Remote Workplaces and recorded to the disk, increases. These factors should be considered while choosing the sample rate of the audio signals.
If audio is to be received from IP devices, then the digitization rate is set on the settings panel of the Microphone object in the driver parameters (see Configuring audio acquisition from IP devices section in Installing and configuring security system components guide). The rate set on the settings panel of the Audio card object is ignored.
In other cases the digitization rate is set on the settings panel of the Audio card object (see Creating and configuring the Audio card object section in Installing and configuring security system components guide). By default, the audio signals sample rate is set to the minimum value. The sample rate is set for each audio capture device individually and covers any microphone, connected to it. Different sample rate settings for different microphones, connected to the same audio capture device, are unavailable.
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