A lydian mode
The A lydian mode consists of the A (Perfect unison), B (Major second), C# (Major third), D# (Diminished fifth), E (Perfect fifth), F# (Major sixth) and G# (Major seventh) notes.

Notes in order
- A — Perfect unison
- B — Major second
- C# — Major third
- D# — Diminished fifth
- E — Perfect fifth
- F# — Major sixth
- G# — Major seventh