The Singing Machine SML385UBK Instruction Manual page 20

Operation
Using the LINE IN Jack (Continued)
W
V
5
Adjust the MIC VOLUME control
as desired. Increasing this control
will increase the volume of both
microphones.
y
6
Rotate the ECHO control to add an echo
effect to your voice. Rotate towards
MAX to increase the echo effect.
U
7
Adjust the balance between the
speakers using the BALANCE control.
8
Press the ON/OFF button to turn the
unit off.
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