Introduction to the Baldassin-Sanderson Temperament
The 4:5 Ratio
Step 1: Tune A4 to 440Hz
Step 2: Tune A3 to A4 as an Expanded 4:2 Octave
Step 3: Tune A2 to A3 as an Expanded 6:3 Octave
Step 4: Test the A2-A4 Double Octave
Step 5: Tune F3 to A3
Step 6: Tune F4 to F3 as an Expanded 4:2 Octave
Step 7: Tune C#4 midway between A3 and F4
Step 8: Re-tune F4 between C#4 and A4
Step 9: Re-tune F3
Step 10: Tune C#3 as an Expanded 6:3 Octave
Step 11: Test Octaves, Thirds and Tenths
Step 12: Tune a Fourth from F3 to A#3
Step 13: Tune a Fourth from A#3 to D#4
Step 14: Tune a Fourth from C4 to F4
Step 15: Tune a Fourth from F3 to A#3
Step 16: Test the Fourths
Step 17: Tune B3 Between G3 and D#4
Step 18: Re-tune G3
Step 19: Re-tune D#4
Step 20: Test the Thirds in a Whole Tone Scale
Step 21: Re-tune A#3 between F3 and D#4
Step 22: Re-tune C4 between G3 and F4
Step 23: Re-test the Fourths
Step 24: Tune F#3 to A#3
Step 25: Tune E4 to C4
Step 26: Tune G#3 to C4
Step 27: Tune D4 to A#3
Step 28: Tune D#3 to G3
Step 29: Tune B2 to D#3
Step 30: Tune E3 to G#3
Step 31: Tune D3 to F#3
Step 32: Tune C3 to E3
Step 33: Tune A#2 to D3
Step 34: Tune G4 to D#4
Step 35: Tune F#4 to D4
Step 36: Tune G#4 to E4
Step 37: Test the Temperament
A Review of the Steps
Conclusion