As the more demanding IEMs have been surfacing, the more accurate volume control is needed to precisely exhibit accurate & balanced audio between the two channels, left & right.

• 随着大量来自IEM的高要求的出现，急切需要一个更加精确的音量控制，以达到更加精准地呈现准确和平衡的左右声道音频这一目的。