Question Logitech Z607 no 5.1 when playing mp3 or Youtube

Aug 31, 2020
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Hello. When I test my speakers under the Windows Settings, all 5 speakers sound when they should. But when I play music or Youtube video, the rear (and the front) sound in the front speakers only. Obviously I selected 5.1 and not 2.1 in the control panel. Any idea ?
 
The audio actually needs to be sending a 5.1 signal to the speakers, are you playing 5.1 audio? Test it with a movie on Netflix or something that you know should be in surround sound.