setMusicVolume and setEffectsVolume both adjust music volume

setMusicVolume and setEffectsVolume both adjust music volume
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#1

I have some background music playing with
cc.audioEngine.playMusic(this.theme, true);

When I adjust the sound effects volume with
cc.audioEngine.setEffectsVolume(0.5);

The volume of the music also changes.
Is this expected behaviour?

Best regards