Thanks for that Irishrailwayman.
I must be confused (its not hard for that to happen).
I thought that both the sound and none sound where Zimo.
I'm not into a lot of CV changing and most of the CV's you mention i do not recognise, in fact all but CV 8 I don't recognise.
I use a Lenz controller and the info that came with the old loksound v3.5 booklet (soundguy class 141/181)I think dose not go that far up the scale.
I will have to try and get into CV's when I am feeling adventures.
Thanks for the info any way.
The replacement chips are on the way back to me so I will see what happens when I fit them.
Regards,
Wiggy.