I'm currently in the process of trying to get my Raspberry Pi to speak to me.
So far I have the Pico TTS engine installed. I plan to further this to be able to speak results from wolfram alpha searches using the speak function. However, when I type a command (e.g. Speak[WolframAlpha["The dark knight"]]), it fails because "a front end is not available".
Please could someone explain what this means and how to go about resolving it? Also, when speaking, will Pico TTS be used for the speech synthesis?