I teach my students all the concert scales. We’re up to C# concert, and I realize I’ve run into a theory question. How would the transposing (non C instruments) read the C# concert scale? For example, Bb instruments would think up one step, which gives them the D# scale. But as I understand it, the D# scale doesn’t really exist. Same thing with Eb instruments–they would think A# scale, which doesn’t exist; likewise, the F instruments would think G# scale, which doesn’t exist.
Now, you could say that instead of the D#, A# and G# scales, they could just think Eb, Bb, or Ab, respectively, but I would argue that then they’re not playing the C# concert scale–they’re really playing the Db concert scale.
So ultimately, I’m wondering if it’s possible for them to actually play the C# concert scale. Help!