How do i adjust the OPUS Codec for an LQ Channel?

Sometimes, one wants to adjust the Codec’s speed, bit rate, Jitter, etc and when LQ devices are not connected to a HelixNet Master Station, that is achievable.


The send and receive settings of an LQ are under the LAM (Local Audio Mix) for each channel on the assignments page

But this LAM is removed when the LQ is connected to HelixNet as the LQ has to use the wavepac CODEC used by HelixNet

Network settings within a Channel are set on a per-device basis. To set differing network quality for ports from the same device, put the ports in separate Channels. Click on the blue-green icon in the lower right-hand side of the channel to access the LAM transport settings. 
Note: The network setting is the bandwidth from the LQ device into the IP network.

Local Audio Mix/Transport Settings
Click a blue label to access settings.
Silence suppression. Default = Disabled
Enabling this option stops transmission and implement comfort noise whenever silence is detected. This is done to conserve network resources.

  Recommended network settings

  • Internet - very low or low

  • LAN / WAN - balanced or high

  • LAN only - very high. This option enables 20 kHz bandwidth.

  • Custom setting - The Custom option allows adjustment of the jitter buffer setting independent of bit rate and packet size.
    Use the slider bar to select the desired network quality for your system. 

The jitter buffer setting is designed to buffer audio received to prevent loss if there is network jitter. The jitter buffer selection directly affects the latency. This is because the lower number in the jitter range represents the amount the LQ unit will buffer the audio before delivering it to the port. A bigger jitter buffer setting increases latency in milliseconds.


Within the Custom setting, selecting an Audio Bitrate of 128 Kbps automatically sets Bandwidth to 20 kHz.


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