Quasar and Legacy VX Audio Issues
Scope
Axia iQx and Quasar console systems running firmware 3.x may experience audio issues when connecting to a legacy VX system running firmware 1.1.4.
Description
When connecting a legacy VX and Quasar together, customers may eventually experience audio issues after the VX has been powered on for a few hours or a day. Examples of this would be distorted audio, fuzzy audio, and anything that sounds notably irregular.
Customers may be able to alleviate this by rebooting the VX unit, but the behavior will usually resume within a day of the reboot.
Technical Specifics
In VX 1.1.4, after so many hours of run time, VX will stop incrementing its RTP timestamps for its Livewire streams.
In legacy Axia, RTP timestamps for Livewire were disregarded. Quasar Engine 2.x also followed this pattern and did not care about the timestamps. However, Quasar 3.x does pay attention to timestamps to align with the PTP sync options.
Even though the Quasar engine is syncing to Livewire clock, the engine will still trust the timestamps it see's in the VX Livewire streams. After the VX stops incrementing the timestamps, Quasar runs into an issue and can't receive the VX streams properly, until you reboot the VX to force the timestamps to start counting again.
Solutions
There are 2 solutions to this problem:
- Roll back Quasar to 2.x (not desirable since you will be unable to take advantage of fixes in future updates)
- Update VX to the last beta update 1.2.8, which fixes the timestamp issue and will resolve the problem.
Below is the 1.2.8 VX engine update file (please backup your VX configuration prior to this update)
https://telos-support.s3.amazonaws.com/Telos/VX+Classic/vxengine-1.2.8-0.1.4866c8c
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