Étienne Fournier on Instagram: "How to make Pinch Harmonics using science! Explained in 60 seconds That math equation is just a guideline that helps me find the sweet spot. But you should really see it as the quarter distance in between the fretted note and the pinch point (node). I hope it's gonna help some of you unlock that technique! #guitar #pinchharmonics #science #physics #harmonics #guitartechnique #lesson #tutorial"