HP Remote Graphics Software (RGS) Manuel d'utilisateur télécharger pdf (Page 52)

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standard naming convention for this control, hence the need to evaluate individual audio devices to

determine their suitability for use on Linux.

The audio devices on Linux are not consistent in the naming conventions of the audio controls. The RGS

Sender installer will attempt to adjust volume levels for known audio devices to allow audio to be captured.

This section describes how to adjust volume levels for the supported audio devices. This information may be

helpful for conguring audio devices that are not currently supported by the RGS Sender installer.

Volume levels can typically be adjusted through the Volume Control application. This is usually found in the

gnome panel or the system preferences menu. The Volume Control application may not show all available

volume controls. The preferences for the Volume Control application may need to be adjusted to allow access

to hidden volume controls.

The alsamixer is a command-line tool for adjusting volume. This application will not hide audio controls like

its GUI counterpart; however, it is not as intuitive. Press the h key after running alsamixer to get additional

information on how to control capture volumes.

Unsupported PCI audio devices are known to allow capture of application generated audio. The names of the

controls that need to be adjusted are not consistent. Names of controls that might need to be adjusted

include PCM, Capture, and Mix.

The device the audio is recorded from must be specied using the following property:

Rgsender.Audio.Linux.DeviceName

Run the command:

cat /proc/asound/devices

From this, you will see a list of the audio devices and it will look something like this:

0: [ 0] : control

1: : sequencer

8: [ 0- 0]: raw midi

16: [ 0- 0]: digital audio playback

17: [ 0- 1]: digital audio playback

24: [ 0- 0]: digital audio capture

32: [ 1] : control

33: : timer

48: [ 1- 0]: digital audio playback

56: [ 1- 0]: digital audio capture

Use an audio device only if it contains the word capture (device number 24 or 56 in the example above).

Between each pair of square brackets, the

rst number is the sound card and the second number is the mixer

device.

Use the following syntax to set the audio capture device, where <c> is the sound card number and <d> is the

mixer device number:

Rgsender.Audio.Linux.DeviceName=plughw:<c>,<d>

Using the example above, you could specify audio device number 24 like below:

Rgsender.Audio.Linux.DeviceName=plughw:0,0

You could alternatively specify audio device number 56 like below:

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HP Remote Graphics Software (RGS) Manuel d'utilisateur Page 52

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