If BassJump Core is selected, only BassJump can be heard. When BassJump Sound System is selected, BassJump and your Pro’s internal speakers play at the same time.
BassJump Sound System should be selected in the Output section of your Sound control panel. In the BassJump Preference Pane there are settings to play with, but we find the 'R&B' setting does a good job with many kinds of music.
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