Hi, hope someone can assist...I have BI4, 9 cameras all working and when trigggered record video...my PC speakers work when viewing a Youtube video and when I play a movie or mp3. I have each camera set to trigger an alert for the PC speakers, but when tested...no sound, config output wav file in my blue iris 4 folder. the path to the wav is accurate and the alarm.wav plays if I click on it in folder explorer. The PC speakers used to work on BI4, but they don't now...not sure what I might have done.