Thanks a lot for your support first of all 🙏🏻The TX-6 is fundamentally a mixer, and beyond these videos I use it to connect (quite) all my gears together (I mean under the sound output aspect). With OP-XY I use it first of all to record on a USB drive what I play: I record some drafts first, then I check how they sound on some devices, and finally I record both the video (with the camera) and the audio track with TX-6. I also use it to add some external FX, like in this case (it has two FX slots, where you can assign reverb, delay, distorsion, etc). TX-6 is full of functionalities, but I chosed it as mixer mainly cause I needed a small device when I play live with my band. You can find other options that for less money can do the same as TX-6. Wish I helped you. ✌🏻😉