Game sounds and voices are too small compare to music.
And decreasing the music volume also reduces the sound and voice.
I want to hear lower music and environmental sound at the same time.
What should I do?

Adding that I'm having issues with this as well - lowering the volume on the music (which is loud even at its lowest setting) does little for it and the sound effects are entirely inaudible. I bought this version because the Steam version is having even worse issues with sound (removing music and the audio briefings) so this issue is particularly frustrating.