To catch these errors too, you need to use an event listener, described below. The purpose of the callback is to alert you to syntax errors in your use of the TTS API, not to catch all possible errors that might occur in the process of synthesizing and outputting speech. The callback returns right away, before the engine has started generating speech. Inside the callback, check runtime.lastError to see if there were any errors. To catch errors and make sure you're calling speak() correctly, pass a callback function that takes no arguments.
Not all speech engines will support all options. speak ( 'Hello, world.', ) Ī complete description of all options can be found in the tts.speak below. You can provide options that control various properties of the speech, such as its rate, pitch, and more. To stop speaking immediately, just call stop(): chrome. # Generating speechĬall speak() from your extension or Chrome App to speak. On all platforms, the user can install extensions that register themselves as alternative speech engines. Chrome provides native support for speech on Windows (using SAPI 5), Mac OS X, and Chrome OS, using speech synthesis capabilities provided by the operating system.
