SpeechSynthesizer doesn't get all installed voices

Question

I have installed a new scansoft voice (Jennifer) in my Windows 7 OS in order to be able to use from in one application i'm developing.

but the problem is that I when I call the method :

   List<string> allInstalledVoices = new SpeechSynthesizer().GetInstalledVoices();

I only get one voice returned, the default Microsoft Anna Voice. but I can see all the installed voices in other text to speech application.

Answer 1

I'm having troubles verifying this, but I believe that Scansoft's Jennifer voice is a SAPI 4.0 compliant voice; the Managed Speech API only works with SAPI 5.1 compliant voices.

Answer 2

I found what the problem was. It turns out that when compiling the project to "Any CPU" (using Visual Studio 2008), the problem occurs. but when changed to x86, the problem doesn't appear anymore.