The C major scale is often the one that we learn the first. Conceptually, it’s the easiest, no sharps, no flats. But it’s actually not the easiest to make sound good.
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All of the major scales are on Saxophone Tribe.
It’s written out for just one octave here, but you should move into the full range of the saxophone when you’re able to do that.
Moving from C to D is probably the hardest transition within this scale. You’re moving from using a small section of the tube to most of it with the octave key, so those are two fairly different situations. You might want to spend some extra time going between those two notes to make sure it sounds good.
Let me know if you have questions.