The E♭ Lydian scale has 7 notes: E♭ – F – G – A – B♭ – C – D. Lydian is the major scale with a raised 4th. That ♯4 floats instead of resolving, giving a dreamy, magical sound loved by film composers. In Indian music it is Kalyan thaat, the scale of raga Yaman.
E♭ and D♯ are the same pitch, so this page covers both names; the notes are spelled from E♭, the way the key is usually written. Compared with the E♭ major scale it has ♯4 (A instead of A♭).
The explorer above is set to E♭ Lydian: the whole neck is mapped, and you can zoom into any of its 7 positions, change the labels to degrees or fingers, and hear it up, down and in patterns.