A Mixolydian scale
The A Mixolydian scale has the formula 1, 2, 3, 4, 5, 6, b7 with notes A, B, C#, D, E, F#, G
The Mixolydian scale is the fifth of the seven modes. It is similar to the major scale, but with a flat 7th note. It is commonly used in popular music, especially rock-based genres.