I understand that Plan-1 only supports standard and premium voices. Do standard and premium voices support emotions, or is it only the Ultra voices that support emotions?

2. Does previewing the text-to-speech deduct characters from the 500K character limit in Plan-1, or are the characters counted only when the audio file is downloaded?

3. Are features such as multi-voice in one file, adding background music to the file, and embedding the audio widget on an external website available in Plan-1?

4. Does Plan-1 support adding pauses and changing voice pitches?