What are you using to split guitar signal??

[stratjacket]

Fortin Spliff
Has 3 outputs, one is isolated
I use 1 output to the pedalboard, 1 output to the tuner and the isolated output to record DI.

Fairly inexpensive and works great.

 

[Music&Chaos]

Interesting. The whole impedance stuff is rig-dependent, as it's something that varies between different pieces of gear, maybe in this case everything aligned just right so it's either not there or not noticeable. Also the interface wouldn't be able to buffer the guitar signal, it has to be something actually in-between the guitar and amp

What does which part? I got lost in anaphors.

I figured it depended on the Hi/Low signal device and the buffer would be needed depending on that.....

I'm sure OP will get it figured out - it isn't that crazy.