D Mixolydian — Double Bass

The D Mixolydian scale runs 7 notes per octave in the modes family. Below it sits on the Double Bass's EADG strings with every root marked, because a bassist reads a scale map as a set of targets around the root, not a row of dots.

Major with a flatted 7th (b7) — bright and bluesy. The dominant chord turned into a tonal center with a rock/folk edge.

Heard in: "Sweet Home Chicago", "Norwegian Wood" (Beatles), Celtic and folk music — anywhere a major sound needs a darker, looser edge.

The Double Bass has no frets to trust: the map marks positions on the fingerboard, and the audio is there to keep your intonation honest — match each note by ear, pizzicato first, then with the bow.

Walk it slowly against the audio, land each root on a downbeat, then take it to the progressions in D and let the scale turn into lines.