DDJ 1000SRT Popping sound

I have a DDJ 1000SRT and I am running an ASUS I7 with 16g RAM.  I have 2 actually.  They both deliver a popping sound on playback both in virtual DJ and ind serato.  I have tried latency, power changes, etc and I cannot seem to find any answer.  Updated drivers and firmware.  This does not happen when I plug in my DDJ SX 2 nor does it happen on my Mac.  Looking for some additional suggestions on how to fix.  Thanks.