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In the Sound interface, select “Recording” tab.
Then, choose a recording device. (It is recommended that you select Microphone of USB
Audio Controller which is highlighted in the picture, then click “Properes”.)
Select “Levels” and adjust the Volume Reading. The reading is from 0 to 100. Normally it
should be 2-6. However, you may refer to the Input Level Indicator from the Audacity
panel that doesn’t exceed 0. Then click “OK” on the Microphone properes interface and
sound interface. Close the Control Panel. (Please note that there is no “Levels” tab in
“Sound” panel in some operang systems, such as Windows 98, Windows 2000. For
Windows 7 users and Vista users, the “Levels” tab in “Sound” panel is available.)