DDJ-800 distorted audio in OBS using ASIO

Acer Nitro 5 -  Intel® Core™ i5, GTX 1050, 256 GB SSD

DDJ-800
Rekordbox 5
latest OBS Studio

I followed this guide
https://forums.pioneerdj.com/hc/en-us/articles/115004807346

the sound is distorted when recording or streaming.

What I did notice was:

In Rekordbox, change from DDJ-800 ASIO to Line In (DDJ-800)
In OBS select Line In (DDJ-800) as the audio capture

sound is then perfect (although settings in Rekordbox means that I cannot use the DDJ correctly)

This leads me to beliee that the issue is with the ASIO driver , etc

Any help would be appreciated - thanks.