A unique feature of NNS Trainer is the ability to fully personalize your study through the "Used numbers" function. This allows you to adapt the music training to your needs:
- Basic Training: Focus on degrees 1-7 for the foundations of harmony.
- Jazz Reharmonization: Extend the training to "tensions" (upper extensions) like 9, 11, and 13.
- Advanced Harmony: Practice altered degrees with sharps (♯) and flats (♭), essential for blues scales or altered dominant chords.