No sound

People ask this as

Viewers hear nothing but the streamer hears everything

This is the single most common cause: OBS has no Application Audio Capture source pointed at strAImer. See the guide "Sound", section "Where the sound plays".

Check in order

  1. Is Overall at zero? Sliders apply as you drag them — there is nothing to save. See the guide "Sound", section "The volume sliders".
  2. Is the app actually running? It depends on what the × of the window does, set under Window close button on Settings → Interface (the guide "Interface"). With Quit strAImer, the default, closing the window quits the application, and the sound stops with it. With Hide to the tray, the app and its sound keep running after the window goes; the strAImer icon next to the clock brings the window back.
  3. Did the sounds folder go away? If it was moved to an external drive that is now disconnected, Settings → Sound shows the path in red with "Folder is unavailable or the drive is disconnected". The default folder is used until it comes back.

Alerts specifically

Voice-over specifically