AC3 Audio Fine, AAC Plays VERY Low

Hi all. I have been running Plex for years and just recently got Plex Pass for the Live TV functions. Since I have done that, any shows/movies I have on my server play very low in any audio format other than AC3. Many are in AAC and are miserable to watch. I can usually listen to a show comfortably with a volume of 8, yet in AAC or mp4 I can barely here it with the TV at 100.

I checked the TV settings which have not changed since everything was working fine.
I also checked the volume settings on my (Windows 10) PC acting as my server and it is at 100.

I have tried every setting possible that I can think of on the Plex server and the Plex app with no luck.

Both audio and video are sent to my TV (Element) by an HDMI cable.

I cannot imagine any of those things are malfunctioning because AC3 audio is working fine.

EDIT: I just thought to check playback on my Amazon Firestick (on the same TV) and the audio is fine.

Thanks in advance!

I’m assuming you are using Plex Media Player as your Plex client.
During playback of a video with AAC audio, press and hold down for a while the + key on your keyboard.

That did it. Thank you so much!!!

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