5.1 Surround Sound in iTunes in Mojave

[cappicard]

Good morning, y'all.

I am noticing an odd behavior with my 5.1 Z506 speaker set in iTunes. For some reason, iTunes is only playing audio through my rear speakers, and not through all 5 speakers. It's playing fine through my subwoofer though.

I do have the aggregate device set up correctly with the proper channels (via MIDI Audio Setup).

YouTube is playing properly through all 5 speakers. It's just iTunes that is acting strange. Is there any setup I'm missing?

 

[cappicard]

5KPlayer is also only playing through the rear speakers. Yet, VLC only plays through the front speakers.