@steviek I just changed a little bit my config:
Focusrite Line Out 2 -> VOX Line In 2
I have now following mixing possibilities:
Focusrite Line In 1: XPressO
Focusrite Line In 2: Integra7
Focusrite Line In 3: XPressO and Integra7 (without Helix)
VOX Line In 1: XPressO and Integra7 with Helix Effects
VOX Line In 2: XPressO and Integra7 without Helix Effects
1.) Focusrite Line In 1 On and Focusrite Line In 2 off and VOX Line In 1 on and VOX Line In 2 off -> only XPressO with Helix Effects
2.) Focusrite Line In 1 On and Focusrite Line In 2 on and VOX Line In 1 off and VOX Line In 2 on -> XPressO and Integra7 mixed without Helix
"On" and "Off" doesn't mean switches, but normal mixing.
The Focusrite Line In 3 is something "special": It's the original (XPressO and Integra7) Output (Unbuffered Output of the Helix).