Readme for Nuance Virtual Extensions

Important information

• The virtual audio channels delivered with this package were previously released as the SpeechMagic Citrix Extension, the SpeechMagic WTS/RDS Extension and the SpeechMagic VMware View Extension.

• The installation procedure has changed from previous versions:

  Each extension now has a separate installer for the server/virtual desktop component and the client component.

  The 64-bit and 32-bit versions of each server/virtual desktop component are now installed together.

• The 64-bit and 32-bit versions of the Nuance RDS Client Audio Extension are now installed together.
• Nuance Citrix Client Audio Extension: The extension does not need to be installed on the server/virtual desktop; the required server binaries are already included in the application folder.

• Nuance PowerMic RDS Client Extension - be aware of the following:

  The extension does not need to be installed on the server; the required server binaries are already included in the application folder.

  The 32-bit and 64-bit versions of the Nuance PowerMic RDS Client Extension are installed together.

• Nuance PowerMic VMware Client Extension:

  The extension does not need to be installed on the server; the required server binaries are already included in the application folder.

  If you upgrade to the 64-bit version of VMware Horizon Client 4.3.0, you must also upgrade the extension.

• Nuance RDS Audio Extension and Nuance PowerMic RDS Client Extension: UDP transport must be disabled on Remote Desktop Protocol (RDP) 8.1 clients and on RDP 10 clients. RDP 8.1 is preinstalled on Windows 8.1 and installed by Microsoft Update on Windows 7 and 8. RDP 10 is preinstalled on Windows 10.

  To disable UDP transport, add the following registry value to the Remote Desktop Client, then restart the PC:

  Key: HKEY_LOCAL_MACHINE\Software\Microsoft\Terminal Server Client

  DWORD Value: DisableUDPTransport = 1

• Nuance virtual extensions: To enable the Audio Wizard to adjust the recording level during calibration and to access improvements in the automatic audio adjustment algorithm in virtual environments (Citrix, RDS and VMware), upgrade the Nuance virtual extension client component to the latest version.

• Nuance VMware Client Audio Extension:

  If you upgrade to the 64-bit version of VMware Horizon Client 4.3.0, you must also upgrade the extension.

  The 64-bit and 32-bit versions of the Nuance VMware Client Audio Extension are now installed together.

• The Nuance virtual extension setups (Citrix, RDS and VMware) for client and server now deploy the 64-bit and 32-bit versions of Microsoft Visual C++ 2015 Redistributable via package installation.
• The 64-bit version of the Nuance Citrix Client Audio Extension for Linux is now available.
• For more information, see the Docs & Guidelines folder.

Known issues

• To use the Nuance RDS Audio Extension on Windows Server 2012, Microsoft hotfix KB2802311 must be installed. For more information, see the Microsoft Knowledge Base, article 2802311. [PSP00069978]
• VMware Virtual Audio on VMware virtual desktops running Microsoft Windows 8.1: Recording can sometimes stop with an internal audio error. This is due to an issue with VMware virtual machines and the xHCI USB host controller for Windows 8.1. Solution: Remove the xHCI controller from the virtual machine and add the EHCI+UHCI controller. For more information, see the VMware Knowledge Base, article 2057809. [PSP00073153]

System requirements*

Nuance Citrix Audio Extension and Nuance PowerMic Citrix Extension

Nuance RDS Audio Extension and Nuance PowerMic RDS Client Extension

Nuance VMware Audio Extension and Nuance PowerMic VMware Client Extension

Backward compatibility

The Nuance virtual extensions client and server components are designed to be backward compatible from the virtual server to the client end point. This means that you can run newer versions of the Nuance virtual extensions on the virtual server and they will work with older versions of the corresponding client-side components with the following caveats and recommendations:

• New server-side components are backward compatible with the corresponding client components for up to one year.
• This policy was introduced with Nuance virtual extensions version 25.0.22.1; it does not apply to earlier releases.
• New releases contain bug fixes and optimizations and it is recommended to install the latest version.

*End-of-life: third party environments

Support for third party environments is only valid as long as they are supported by the corresponding vendor and might be subject to other restrictions. Please contact Nuance Technical Support for details. For more information, see the documentation delivered with the third party product and supporting Nuance documentation.

When support by the vendor has stopped, Nuance will continue support if an issue is specific to the Nuance solution, within the limitations of the vendor’s and Nuance's end-of-life policy. This means that issues that are a combination of the vendor’s component and the Nuance solution cannot be supported.