@Lindon Thanks so much. I assumed the forking suggestion wasn't the right move. It's so good to have such a great community with people like you and Dave H. providing expert support. I haven't yet communicated with Christoph but the experience using HISE as a newbie, truly shows how a community like this is a formidable asset
Thanks again.

@David-Healey Thanks. Once I removed IsPluginParameter from all sliders the interaction is gone. Before I removed it from all it interacted with the next one. As I understand, this will eliminate writing DAW automation for the controls. I guess I can start this way and hope for a fix in the future. Should I report it under bugs?
In any case thanks for the help. I did enjoy your Bootcamp and hope to use HISE successfully and start scripting soon.

@Jeetender It will remove DC. Technically DC is 0hz thus HiPass filtering the lowest frequency i.e. 3,4 or 5Hz will effectively remove the DC.
However, it will introduce phase differences similarly to an all pass filter, thus subtracting it from the original will leave audible residue. That should be Okay and is just like any HiPass based on IIR. You can use an FIR, however to be phase linear it'll have to have a fairly long delay.