distortion on playback

Hi all i am new to audacity , i using windows 11 and audacity version 3.1.0, i jave multiple synths plugged into a devine mixer and the mixer is connecteted to my laptop via usb cable , the problem i am getting is when i play back what i have recorded there is distortion , i have looked through the effects list and tried to turn down levels on volume , base and treble even input volumes and also the mixer volumes like gain all with no joy , can anyone give advice on how to get rid of the distortion pls