Bluetooth wasn't on....
Location services > changing to battery saving - Done!
Turning off hot word detection for "OK Google" - Will do that next (have to find it)
Ringtone / MP3
I saw they were all *.ogg, so I actually never tried mp3 (I think). I have Audacity and conversion is easy anyway.
Long press home screen (empty space), Settings -> Voice -> Hotword Detection
Or in the google now screen scroll to the bottom and choose the 3 vertical dots, then choose settings.