Frequency Comparison Tool

Calculate and visualize the differences between 12-TET and Just Intonation.

Comparison Table
Note 12-TET Just (JI) Cents Diff Play

Deviation Graph (Cents)

Note

12-TET divides the octave into 12 equal parts. Just Intonation uses simple whole-number ratios (e.g., 3/2 for perfect fifths). The chart shows the discrepancy between these two systems.