With Android accessibility, one can never understand what Google is up to. Take Google TTS for Android as an example. Google doesn't allow TalkBack to use high-quality Google voices despite playing high-quality samples via the Test voice button. And the low-quality ones sound pathetic - like low-quality Vocalizer voices - even worse. However, if you install an app like Auto TTS, a paid product, you can force TalkBack, or other screen readers, to use high-quality Google voices. And Google keeps tweeking TTS-related options in strange ways. Yesterday's update, for instance, made voices a bit more expressive by raising the pitch of the first syllable of each utterence.