USB3 Troubleshooting for Mac and PC : The lights that measure my recording level don
Be sure your recording levels are set high enough as stated in the previous question. If the levels are set properly, Be sure the Record Select M/G Line mix switch is set in the proper position. If should be to the left if you want to record the Mic/Line input, it should be in the center if you want to record the L/R line inputs on the back, or it should be to the right if you want to record the Mic/Guitar and line inputs simultaneously.
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