Broke 5.1 in the players?

Question

Audio

I never set up anything related to audio, 5.1 always worked like clockwork, but today, after updating AIMP to the latest version, I got sound in 2 rear speakers only. Moreover, this behavior is typical for all installed players: AIMP, WMP, KMPlayer, etc.
When I start a video on youtube, I hear sound from all 5 speakers + subwoofer. And the players do not want to work.
I found a small cure: in the audio settings, I turned on the effect: Enable speaker fill. But this is not a solution, this is virtualization.
Does anyone know how to deal with this?

Motherboard Asus Crosshair IV formula, there is VIA audio

Answer 1

I also updated AIMP to the latest version and the sound when playing through the player has changed a lot. The bass has decreased, the volume has decreased, there is no surround sound (I use the Razer Megalodon), although all the settings are exactly the same as before the update.