手动音频增益，可选择的输入源，禁用agc和数字滤波器。
Manual audio gain, selectable input source, disable AGC and digital filters.
在那个菜单里，你可以手动进一个样品，零点基线，和改变增益及等离子电源。
From that menu you may manually inject a sample, zero the baseline, and change gain and plasma power.
这对VOIP (voice over IP)是非常有用的，因为它不需要再手动去调整麦克风增益。
This is useful for voice over IP because it removes the need for manual adjustment of the microphone gain.
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