This IGEL Linux version contains Nuance Citrix Client Audio Extension for Linux 7.48.0
Nuance Citrix Client Audio Extension configures audio redirection on a Linux thin client in a Citrix environment, to provide optimal support for speech recognition.
Installing on an IGEL thin client (firmware version 5.08.100 or higher)
Nuance supports the following IGEL thin clients with firmware version LX 10.3.x
The Nuance Extension will be available on all devices mentioned in the IGEL Knowledge Base under 10.3.x, see IGEL OS.
Important: Due to changes in the firmware versions by the manufacturer we do not guarantee that our drivers will work with other firmware versions than the ones tested by us.
| Device | Sound card ID | Sound card name | Comments |
|---|---|---|---|
| Philips SpeechMike III | III | SpeechMike III | |
| Philips SpeechMike Premium | III | SpeechMike III | |
| Grundig Digta SonicMic 3 | D3 | Digta SonicMic 3 | |
| Nuance PowerMic | (via PulseAudio) | Default audio device; no button support |
For the selection of audio devices, the following priority conditions apply:
The following audio formats are supported:
In version 5.08.100 and higher, the Nuance Citrix Client Audio Extension is delivered with the IGEL firmware. To activate the extension, do the following:
In the Sessions tab, browse for:
Citrix XenDesktop / XenApp, HDX / ICA Global, Mapping, Device Support
To enable logging, do the following:
Make sure that log4crc is available in the $HOME directory of the user who starts the client and rename it to .log4crc. For example:
cp /usr/lib/ICAClient/log4crc /userhome/.log4crc
Open .log4crc; if the file is read-only change it to read/write (you must have rights to change the file).
Set the priority to "trace" (for detailed logging) or "error" (for error logging only) and change the line which begins with category name = to:
Audio extension: nuance.smac.citrix.sbext
Mixer: nuance.smac.citrix.mixer
Note: If you do not want logging, comment out these lines or remove the .log4crc file completely.
logdir="/tmp/"The log file prefix is the first part of the file name. The default settings are:
Audio extension: prefix="nca_ica_log"
Mixer: prefix="nca_ica_mixer_log"
Audio extension names are nca_ica_log.n and mixer nca_ica_mixer_log.n (where n is a consecutive number).
Every log file has a number appended to its prefix name. Numbers begin at 0 and existing log files are renamed to next consecutive number; the newest log file always has the number 0.
maxnum sets the maximum number of log files created. To have 5 log files, set the maxnum as follows: maxnum="5"
Older files are deleted when there are more than 5 files.
maxsize sets the maximum size of a log file in bytes. If the maximum size is reached, the log file will be renamed to next number following the policy from maxnum and a new log file is created with the number 0. The default settings are:
Audio extension: maxsize="20000000"
Mixer: maxsize="5000000"
For Philips SpeechMike and Foot Control devices contact Philips Speech Processing Solutions. The Nuance Citrix Audio Extension does not provide support for SpeechMike button redirection.
To use the Philips SpeechMike if it is not the default audio device, set the environment variable NUANCE_USED_SOUNDCARDNUMBER to the sound card number of the SpeechMike. If the environment variable does not exist or is invalid, the default sound card will be used.
Recording with the internal sound card is not supported.
Using the internal sound card in parallel with a USB audio device is currently not possible because it is not possible to set the internal sound card as the default sound card when a USB default audio device is plugged in.