User`s manual

External USB 7.1 Channel Sound Box User’s Manual
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6. Start Key Shifting Function: Select this button to enable key shifting function
and control.
7. Key Shifting Low/High Control Bar: This function can adjust tune of background
music to fit your singing.
8. Star Vocal Cancellation Function: Select this button to enable vocal cancellation
function and control.
9. Vocal Canceling Control Bar: This function can control singer’s vocal of
background music and cancel it as possible.