In theory, Android 4.0 should support typed arrays. However, when trying to initialize a Float64Array over an existing buffer an INDEX_SIZE_ERR is thrown. Therefore generateSpeech doesn't really work
Just to add I'm also trying to use this on an Android 4.0.1 handset and testing with Dolphin with the same result. I've got my own code and the demo page that I have tried with the same result.
In theory, Android 4.0 should support typed arrays. However, when trying to initialize a Float64Array over an existing buffer an INDEX_SIZE_ERR is thrown. Therefore generateSpeech doesn't really work