I would like to use, at the same time, the stereo loop with pedals and an external stereo audio source using the same AUX IN+Alternate Input jacks
Could you recommend any small device or pedal that can mix this two stereo loops?
Maybe something like this:
2 pair x Left/Right 1/4" inputs (one LR pair to the stereo pedal, one LR to the stereo audio source) mixed into a single pair LR 1/4" outputs that will be connected to the KP AuxIn and Alternate Input.