No sound coming out of right channel in headphones with traktor S4 MK2

No sound coming out of right channel in headphones with traktor S4 MK2

Trying to figure why this started happening all of a sudden. I am running Traktor Pro 2 on a macbook pro and have tried different pairs of headphones with different adaptors. I have also checked the audio settings to make sure the audio channels are balanced. Is it possible that this is a defect? Or is there just some preference setting I am overlooking? Please help

Check the pan knob in the software.
If it was working fine before and nothing has changed, you may have a faulty headphone jack.