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The Dragon RDS Client Audio Extension and Dragon PowerMic RDS Client Extension provide custom audio and microphone button channels for the following products:
Microsoft Remote Desktop Services (RDS)
Microsoft Windows and Windows Embedded operating systems
The following speech recognition apps:
Dragon Medical One Desktop Application
Dragon Medical Direct
Dragon Case and Care
Apps based on Dragon Medical SpeechKit (.NET and COM editions)
Apps based on SpeechMagic SDK
For more information on hardware, software and network requirements, see: Requirements.
App deployment
Apps or desktops that are hosted in a virtualized environment are displayed as a bit map image via a receiver or remote desktop app.
This has the following implications:
Your speech recognition app isn't installed on the client end point, but on the remote server/virtual desktop.
Your speech recognition app isn't installed where the microphone is plugged in.
If your speech recognition app sends recognized text to a target app (for example, a clinical documentation program or word processor), the speech recognition app must be installed on the same server or virtual desktop image as the target app to be able to access the target app's text controls.
Note
In Windows Server 2019 and higher, apps must be given explicit access to hardware devices via Group Policy. To allow the speech recognition app to access the microphone device that's passed into the VDI session, create a Group Policy Object (GPO) for all users to set the registry key HKEY_CURRENT\USER\Software\Microsoft\Windows\CurrentVersion\CapabilityAccessManager\ConsentStore\microphone to Allow; this can then be applied to all servers.
Audio channels
High quality audio is required for accurate speech recognition. Regardless of the virtualization technology and architecture, you must be able to deliver audio from the client end point to the app hosted on the server.
Native audio channels can require between 150 kbps and 1 Mbps bandwidth between the client end point and the hosted app. The Dragon RDS Client Audio Extension reduces the bandwidth requirement to 19.2-27.8 kbps (depending on the sound format).
The corresponding improvements in app responsiveness and performance are critical to the user experience.
Microphone control channels
Microphone buttons, sliders and other controls must be routed separately to the speech recognition app.
To enable this for the Nuance PowerMic in a Microsoft RDS system, the Dragon PowerMic RDS Client Extension provides a custom channel for Nuance PowerMic button controls.
For Philips and Grundig devices, third party redistributable packages are available.
Package contents
Dragon RDS Client Audio Extension
A virtual audio channel for Microsoft RDS systems.
Client component:
Dragon RDS Audio and Button Extensions\Client\Dragon RDS Client Audio Extension.exeDragon PowerMic RDS Client Extension
A virtual channel for Nuance PowerMic button controls in a Microsoft RDS system.
Client component:
Dragon RDS Audio and Button Extensions\Client\Dragon PowerMic RDS Client Extension.exe
Medical device disclaimer
Microsoft products and services (1) are not designed, intended or made available as medical devices, and (2) are not designed or intended to be a substitute for professional medical advice, diagnosis, treatment, or judgment and should not be used to replace or as a substitute for professional medical advice, diagnosis, treatment, or judgment.
Some information relates to pre-released products which may be substantially modified before they are commercially released. Microsoft makes no warranties, express or implied, with respect to the information provided here.