Audio

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Audio devices (="sound cards") are recognized and used automatically by NoTouch. Most machines only have one sound card, but this card has several audio input and output jacks that are on the front or back of the computer system.

If you connect a USB headset (or generally speaking any other USB audio device), this is technically a second audio device (i.e. another sound card). Don't worry - NoTouch will handly this for you, just as a regular desktop operating system handles this - external devices get precedence over internal once.

There are Hotkeys to modify audio volume - Please see this article on how to change keyboard shortcuts: Hotkeys

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.

General audio troubleshooting guides

  • If you log in to the local configuration and click on "Play test sound", do you hear sound? If so, the local audio infrastructure is working, then look in the protocol specific settings or server policies. Audio forwarding could be just deactivated. If you do not hear the test sound, check volume and potentially change audio parameters.
  • A good "catch-all" test is to change the "Unmute mixers" and "Use aumix" parameters (see below).
  • Output works, but input (microphone) doesn't. Now this is very likely a problem in the settings of the protocol. While e.g. Citrix and RDP are capable of transporting microphone/audio input, please make sure that:
    • you have audio input forwarding set to on (protocol-specific connection options).
    • in case of RDP, you use FreeRDP. Only FreeRDP can do audio-in, the older rdesktop doesn't.

Audio parameters

  • Audio device. This parameter governs to which audio device the audio output is sent.
  • Unmute mixers. Do not mute mixer channels. This may sound weird, but it can change the behavior of problematic devices.
  • Use aumix. Uses an alternate method for driving the audio mixer. Use if you find you are unable to change the volume.
  • Mixer channel parameters. These govern the mixer volumes for different channels. 0 means lowest, 100 largest. The default is 50:
    • Master. Master output volume.
    • PCM. PCM output volume.
    • Front. Front jack volume.
    • Microphone. Microphone input volume.
    • Capture. Capture input volume.