loud timecode audio noise on obs video output on DJM 250

hi

i have a djm-250 mk2

i broadcast on obs version 23.2.1 964 bit)
using rekordbox 5.8.5

if i play a digital track then i hear the timecode tone throughout the video recording

yet i don't hear the timecode tone through the speakers at the time

if i just record the audio output of recordbox within recordbox app then i don't hear the timecode signal on the audiorecording and audio is fine

so the issue seems specific to the audio on video recording output and its important for the radio show i do monthly

wondered if any suggestions from forum members as pioneer tech support is completley unhelpful on this matter ?

many thanks if anyone can help me resolve this issue :-D