To use a particular speech engine in your code, use the Agent API to set the engine. For speech input engines, use SRModeID, specifying the mode ID for the engine. However, note that the engine must be installed. To determine if the engine is present, you can query SRModeID. The engine must match the character's LanguageID setting. For example, you cannot set SRModeID to a German speech recognition engine mode ID for a character whose LanguageID is French.
Speech Input Engine Mode IDs
| Voice | Mode IDs |
|---|---|
| Microsoft Speech Recognition Engine v4.0 | {D8905400-B5C8-11D0-B968020AFDB1B9C} |
Check and set the character's LanguageID and SRModeID in your code before you attempt to define grammar for the voice parameters of Command objects your application. Also consider checking the browser or system language so you can be certain to match your users' configuration. The engine may fail if you attempt to define a grammar for a language that the engine does not match.
A character set for text-to-speech (TTS) output can be compiled with a default speech output engine's mode ID preference. When the character is loaded, if the engine is installed and matches the character's LanguageID, Agent will attempt to load that mode ID for speech output. If the engine is not present or has a different LanguageID, Agent will attempt to load the first mode ID it finds that matches the character's LanguageID, but still sets the character's compiled speed and pitch setting.
To query for or set an engine's mode ID, use TTSModeID. With TTSModeID you can set a mode ID that is different from the character's LanguageID. For instance, you can set a German character to speak using a French mode ID. Speech output engine mode IDs not only define which engine you use, but also correspond to specific voices supported for an engine. You can also use the Microsoft Agent Character Editor or the tools included in the Microsoft Speech SDK to query for the mode IDs of TTS engines installed on your system.
Speech Output Mode IDs
| Voice | Mode IDs |
|---|---|
| Adult Female #1, US English, L&H TruVoice | {CA141FD0-AC7F-11D1-97A3-006008273008} |
| Adult Female #2, US English, L&H TruVoice | {CA141FD0-AC7F-11D1-97A3-006008273009} |
| Adult Male #1, US English, L&H TruVoice | {CA141FD0-AC7F-11D1-97A3-006008273000} |
| Adult Male #2, US English, L&H TruVoice | {CA141FD0-AC7F-11D1-97A3-006008273001} |
| Adult Male #3, US English, L&H TruVoice | {CA141FD0-AC7F-11D1-97A3-006008273002} |
| Adult Male #4, US English, L&H TruVoice | {CA141FD0-AC7F-11D1-97A3-006008273003} |
| Adult Male #5, US English, L&H TruVoice | {CA141FD0-AC7F-11D1-97A3-006008273004} |
| Adult Male #6, US English, L&H TruVoice | {CA141FD0-AC7F-11D1-97A3-006008273005} |
| Adult Male #7, US English, L&H TruVoice | {CA141FD0-AC7F-11D1-97A3-006008273006} |
| Adult Male #8, US English, L&H TruVoice | {CA141FD0-AC7F-11D1-97A3-006008273007} |
Note There is a difference between a speech engine's installation CLSID and its mode ID. Similarly, a speech engine also has an engine ID, but this ID is not applicable in the Agent API.
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