Chapters
The quality of a flattened interval is called 'diminished'.
For example, when a Perfect 5th, is flattened (-1 semitone) it will become a diminished 5th.
Listen how a Perfect 5th becomes a diminished 5th:
We use cookies to improve your experience. Essential cookies keep the site running. We also use optional cookies to enhance performance, analyze traffic, and personalize ads. By clicking “Accept”, you agree to the use of all cookies.