Problem Time Stretch

Hi everybody,
I have a problem with the time stretch in master tempo mode to keep the tone, the sound is very rough in the bass compared to rekordbox, where it comes from? Is what I missed a setting in the preferences?
I have a problem with the time stretch in master tempo mode to keep the tone, the sound is very rough in the bass compared to rekordbox, where it comes from? Is what I missed a setting in the preferences?