Same notes, a different home

A collection needs a center

The white-key collection can be organized around C as major or around A as natural minor. It can also be organized around D as Dorian. Listing the same seven pitch classes does not tell the whole story: the tonic changes the degree relationships.

A scale exercise often begins on its tonic, but merely starting a melody on D does not prove that the music is D Dorian. Listen for the note the phrase emphasizes and returns to. Treat the starting note as a clue, not an automatic analysis.

Compare modes on the same tonic

For a clear first comparison, keep C as tonic and change the pattern. C major, also called C Ionian, is C, D, E, F, G, A, B. C Lydian raises F to F-sharp. C Mixolydian lowers B to B-flat.

This comparison removes the change of tonic, making each characteristic degree easier to locate. You can hear the same C underneath the different collections and read exactly which note has changed.

Compare the modes with a minor third

C natural minor, or C Aeolian, contains C, D, E-flat, F, G, A-flat, B-flat. C Dorian raises its sixth to A natural. C Phrygian lowers its second to D-flat. C Locrian lowers both the second and fifth, giving D-flat and G-flat.

Locrian therefore has a diminished fifth above its tonic, unlike the perfect fifth in the other examples. Keep that detail visible instead of describing every mode with a minor third as simply another minor scale.

Connect this to the shared-note view

You can also derive the seven diatonic modes from one major collection. C major’s notes, treated around D, produce D Dorian; around E, E Phrygian; around F, F Lydian; around G, G Mixolydian; around A, A Aeolian; and around B, B Locrian.

Both approaches are useful. The shared-note view explains relationships among collections. The same-tonic view highlights the changed degrees. Neither requires duplicate reference pages for Ionian and major or for Aeolian and natural minor.

Give the characteristic note room

Try a short phrase that repeatedly returns to C. For Lydian, include F-sharp so the raised fourth is audible. For Mixolydian, compare B-flat with the B natural of major. Keep the rhythm and register similar before changing anything else.

A mode does not prescribe one mood, one genre or a complete chord progression. Those associations vary with musical context. The tool supplies an exact collection and a way to hear it; you provide the phrase and the comparison.

For a minor-centered example, compare D Dorian, D–E–F–G–A–B–C, with D natural minor, D–E–F–G–A–B-flat–C. Keep D as the point of return and compare B with B-flat. Both collections have F as a minor third, so that shared third cannot identify which one you chose. The sixth is the decisive difference in this comparison.

Use a three-mode comparison

Choose C major, C Lydian and C Mixolydian in turn. Read the full note list and then hide it from your attention while listening. Return to the list to check your observation.

1. Keep C as tonic for every example.
2. Identify the changed fourth or seventh before playing.
3. Play slowly and return to C after the characteristic note.
4. Compare with the shared-note version only after the same-tonic difference is clear.