You'll find 3 minimal experiments you can check out with all your mouthpiece to pinpoint tone issues or greatly enhance tone resonance and tune. 3rd Be aware: Dorian contains a slight 3rd, which makes it a insignificant scale, while Lydian has An important third, which makes it a major scale. https://spencerinrsu.mybjjblog.com/how-much-you-need-to-expect-you-ll-pay-for-a-good-d-flat-dorian-scale-for-saxophone-40054906