Introducing a pair of 14-year-old Harvard Square buskers with a sound beyond their years

At first glance, the Harvard Square busking duo Vibe Check might induce disbelief. How could two people so young play such complex, funky, rock-fueled music? Is there trickery employed here, like prerecorded tracks?

https://www.bostonglobe.com/2021/11/01/arts/introducing-pair-14-year-old-harvard-square-buskers-with-sound-beyond-their-years/