I had an octatrack for several years and i sold it. Today, i bought the mk1 in a very good condition. Everything seems working but for some reason the crossfader is reverse.
Scene A will play Scene B and Scene B will play Scene A.
If the 2 scenes are empty and i decide to apply the filter or delay on Scene B, the only way to ear this is to move the crossfader to Scene A. If you stay on Scene B, you won’t ear any change. Crazy!!! I’m an advanced user of the OT and i already plaid Live in music festival
I tried different projects and i have always the same result.
The Os was 1.25H so i updated to 1.30C (the latest os when i sold my ot). Guess what? Same problem! i never seen something like that. After 2 years without OT maybe i missed something.
Any idea? it was my happy day until this. I hope i didn’t spend money for a second hand broken gear 
Start in test mode, calibrate crossfader.
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how to start in test mode?
Keep [FUNC] pressed while booting.
start in 
mode, type calibrate crossfader ! 
there are plenty of posts on this already @kpdp
https://www.elektronauts.com/guidelines
keep it tidy
thanks
e.g.
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Guys, you saved my life and put a smile on my face!!!
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