My gain staging is fine I've checked and rechecked that.
It's not happening in the actual models or line out - I have tried sending a stereo line out from helix to my focusrite audio interface, where I've listened both on studio monitors and by plugging my same headphones into the interface. No clipping noise noted.
Only when I plug my headphones into the helix headphone out do I hear digital clipping and its mostly in the right ear.
Has this happened to anyone else and what is the solution?
Unfortunately my helix is developing quite a few problems now it's a few years old. The microphone preamp stopped working completely long ago. All the settings have been checked over and over and its 100% the preamp that is broken. Additionally one of the footswitches is failing to latch. When pressed it just momentarily lights up. I've had total system freeze a few times too which requires power off and back on.
Updating firmware has not helped these issues. I dread to think what it would cost to repair all this!