How do I correct low sound level?

Thank you for your reply!

Yes. Here is more of the explanation.

A couple of days ago, I purchased and downloaded Noire, Session Upright, and Electric Keys. Everything functioned flawlessly in for one day on my MacBook Pro after it was downloaded. This morning, when I sat down to again use Kontakt Player, there was no usable sound output. The sound was very, very faint. None of Kontakt Player's settings that increased sound output the day before would increase sound output today. At the same time, all other aspects related to sound output from other applications on the MacBook are still perfectly functional with normal sound output. Also, the two keyboards with midi connectivity that initially functioned well with Kontakt Player after I finished the downloads of the instruments still function well today. Here is why I believe this to be so. The keyboard at the bottom of the screen in Kontakt Player still shows that the keys in blue tint on both keyboards are being pressed down when I press the keys down.

Hello donmaddonald,

Thank you for your reply!

Yes, I used another audio plugin and the audio is fine.

I do not have a DAW. I am using the stand alone version of Kontakt.

Yes, I would gladly share screenshots of my Kontakt. What screens would you like to receive?

Hello donmaddonald,

Thank you for your reply!

Here is a screenshot of the main screen.