Diatonic Number Assignment
Map Roman numerals to chord qualities in major keys: 1(Maj), 2(min), 3(min), 4(Maj), 5(Maj), 6(min), 7(dim).
Step-by-Step Bass Tutorial
Nashville Number System Guide for Bassists
Learn how to transpose any song instantly on bass guitar using chord numbers (1, 4, 5, 6m) across all 12 keys on the bandstand.
Step-by-Step Practice Guide
Pop Progression (1-5-6-4)
Memorize the geometric triangle shape on the fretboard for the world鈥檚 most popular chord cycle.
Instant Key Transposition
Move the physical shape along the fretboard to change key instantly without re-learning note names.
Web MIDI Real-Time Practice
Connect your MIDI device to Basnote Simple Learning to test your speed on chord number calls.