I have turtle beach px4 headphones and they are running optical from my laptop. Its a 5.1 audio setup and ive been noticing that some of the channels were playing louder than others. I went into "Playback Devices" and found my optical output and went to "Properties" for my audio optical out device and I went to the "Levels" tab and went to "Balance" I noticed that only channel 5 was changing to the audio volume.
So I want to know how to make all the channels go up at the same time, I already tried to match the volume of all the channels but still only channel 5 changes to what i change the master to.

So I want to know how to make all the channels go up at the same time, I already tried to match the volume of all the channels but still only channel 5 changes to what i change the master to.