Way back in 2017, Roland carved out a little niche for itself with the introduction of the Go:Mixer line. The small, portable audio interfaces are a convenient way to connect a mic and multiple musical instruments (or audio sources) to your phone for more professional public performances or on-the-go recording. At this year’s NAMM show, the company unveiled the latest in the family — the Go:Mixer Studio — and it’s the most premium version to date.  The Studio adds a display, multitrack output and onboard effects along with a far more luxurious design. At $300, there’s also a far more luxurious price tag. The Go:Mixer Pro-X was already a capable option, and competing products from Mackie and Zoom are also vying for your hard-earned musical dollars. The big question, then, is can the Studio make a case for itself at this elevated price point? Right off the bat, in terms of usefulness, the Studio is a solid step up from the Pro-X thanks to the addition of a second XLR port.…