TTS in voice from Nabu Casa cloud

I was looking to use the new voices in Nabu Casa in TTS via a media player. The only way I can see to use the voices is thru assist. I just want to have my media player speak an announcement in a voice from the Nabu Casa cloud. While looking in the TTS thru a media player I have option of google or Nabu Casa but the Nabu Casa voices are different then ones from assist.