Music in left channel only, voice center?? Then the viewer removing one earphone or changing a balance control?? Also (and more plausible), in a "lower informa

Music in left channel only, voice center?? Then the viewer removing one earphone or changing a balance control?? Also (and more plausible), in a "lower information" mood I will stream music in a different tab. Generally each tab's player will have a separate volume control.