1. Input settings on User Bank 13 (A, B, C, D) are set incorrectly.
Tone 1 is set to GTR 1 + Variax and Tone 2 is set to Mic 1. Because the XLR and 1/4" inputs on the X3 Pro on the same channel cannot be used at the same time, this will not work.
The work around here is to re-save each patch in Bank 13 with the input setting on Tone 2 set to Mic 2.
2. Audio from the Tuner does not mute when connected digitally to audio interface.
When using the tuner on the POD X3 Pro, the audio from the tuner does not mute on the S/PDIF and AES/EBU digital outputs even with Mute selected in the Tuner menu screen.
3. Tuner does not work with Guitar 2 Input.
The tuner will only tune instruments that are plugged into the Guitar 1 and Variax inputs on the POD X3 Pro.