
5
STRETCH TUNING PARTIALS
When the SOT II creates a stretch tuning, the program creates the tuning and it is automatically set
the SOT II to the correct partial in the following manner. This is illustrated in more detail in the
following tables:
OCTAVE
PARTIAL
KEYBOARD
PITCH OF PARTIAL
Octave 3
Fourth Partial
C3
C5
Octave 4
Fourth Partial
F4
F6
Octave 4
Second Partial
F#4
F#5
Octave 5
Second Partial
F5
F6
Octave 5
Second Partial
F#5
F#5
Octave 6
First Partial
F6
F6
Just to reiterate, C3 to F4 fourth partial, F#4 to F5 second partial, F#5 to F6 fundamental partial as
shown in the table below.
Piano
Note
SOT
Automatically
listening to
Piano
Note
SOT
Automatically
listening to
Piano
Note
SOT
Automatically
listening to
C3
C5 F#4
F#5 F#5
F#5
C#3
C#5 G4
G5 G5
G5
D3
D5 G#4
G#5 G#5
G#5
D#3
D#5 A4
A5 A5
A5
E3
E5
A#4
A#5 A#5
A#5
F3
F5 B4
B5 B5
B5
F#3
F#5 C5
C6 C6
C6
G3
G5 C#5
C#6 C#6
C#6
G#3
G#5 D5
D6 D6
D6
A3
A5 E5
E6 E6
E6
A#3
A#5 F5
F6 F6
F6
B3
B5
C4 C6
2
nd
Partial
1
st
Partial
C#4 C#6
(Fundamental)
D4
D6
D#4 D#6
E4
E6
F4
F6
4
th
Partial
STRETCH Tuning from C3 to F6
After the stretch tuning has been selected, (stretch button backlit) tuning can start on any note
between C3 and F6. When ready to tune the next note, turn the NOTE and or OCTAVE knobs. For
every semitone the SOT will automatically update the partial and cents deviation for the next note,
continue this way for the notes C3 to F6. Just to verify: the SOT should be set to the note on the
piano you are tuning and the SOT II automatically selects the partial and cents deviation.
Unison Tuning
Unisons may be tuned aurally along with a stretch tuning of the center string, or each string may be
tuned individually to the SOT II and the unisons checked aurally later on. The SOT II will do an
excellent job of tuning unisons when the strings of a given note are well matched. (They are on