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Please note that in a VDI world audio is usually generated on a server-side virtual desktop (i.e. inside a Windows system in most cases) and then forwarded over a protocol like ICA/HDX, RDP, PCoIP to the client. If you use Firefox, you need to enable the "Force execution as root" parameter in the Connection settings, otherwise Firefox will not be allowed to access the sound device.
'''IMPORTANT NOTE:
For RX-HDX and RX420(HDX) thin clients, the default audio setting optimizes the USB audio quality and performance. This may have a negative effect on analog audio. If analog audio (headset/speaker) or HDMI audio (built-in monitor speaker) is to be used, please follow the [https://support.ncomputing.com/portal/kb/articles/rx-hdx-audio-settings '''knowledge base article here'''] to configure the proper audio setting to provide best audio quality and performance.
== General audio troubleshooting guides ==