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The music source is selected automatically in default setting. To set the conditions for selection, refer to “Auto input condition” on page 14. To select the music source manually, refer to “Input mode” on page 14. 4 Adjust the microphone volume by rotating MIC. When different microphone volumes are not balanced, adjust MIC VOL using a flathead screwdriver. 5 Adjust the ECHO amount by rotating ECHO. 6 Adjust the key by rotating KEY CONTROL. ¦ Notes for the proper use of microphones • Sing into t