The Singing Machine SMC2035 Instruction Manual page 16

Operation
Using a Bluetooth Device (Continued)
an
ao
13
To sing without the lead singer on
the recording, press the VOCALS
OFF button. To resume the lead
singer, press again.
NOTE: Lead vocal removal might work
better on some songs than others.
am
14
Toggle the VOICE EFFECTS
control to select the voice effects.
15
Press and hold the
turn off the unit.
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