1.3.1.4 CROSSED MIRRORED FOURTHS, BASS IN THE MIDDLE

Tuning word is «1< 6_mel_4ths_RH // 6_bass_4ths_LH > 12 »  seen from the player
In this system, the lowest string acts as an axis of symmetry. This tuning is easy to adapt for people who play the Chapman tuning and wish to try the bass in fourths, just by re-tuning a few strings.
During the summer of 1985, I was still playing the Chapman tuning. I decided that, as a music reader, I could not go anymore with the fifth-fourth tuning, which I found too complicated, especially as I  wanted to read music and play « bass lines » in the sense of  Bach. And so, on a suggestion from Jim Lampi, I tuned my bass in fourths, This tuning became known as the « mirrored fourths » tuning.

Table 1-9 The 12-strings mirrored 4th /4th crossed hands

string:
12

11

10

9

8

7

6

5

4

3

2

1

Bass/Melody
B1

B2

B3

B4

B5

B6

M6

M5

M4

M3

M2

M1

row 9:
Bb2

F2

C2

G1

D1

A0

A1

D2

G2

C3

F3

Bb3

open (row 0)
Db2

Ab1

Eb1

Bb0

F0

C0

C1

F1

Bb1

Eb2

Ab2

Db3

gauge ” (light)
.013

.022

.028

.044

.065

.092

.034

.025

.016

.012

.009

.008

diameter: mm
.33

.55

.76

1.12

1.66

2.34

.87

.64

.41

.31

.23

.20

gauge ” (heavy)
.016

.028

.032

.048

.080

.110

.038

.026

.018

.014

.011

.009

diameter: mm
.41

.71

.81

1.22

2.03

2.80

.97

.66

.46

.36

.28

.23

 

tu-10-mir44row9
Figure 1-3 Tuning 10 strings in mirrored fourths, crossed hands. Notes at row 9.

Board 10 44

Figure 1-4 Tuning 10 strings in mirrored fourths, crossed hands. The setting is analogue to the Chapman tuning but with the bass in fourths instead of fifths.

We give in  the variant of the same tuning for a ten strings instrument.
Tuning word; « 1<5_bass_4ths_LH // 5_mel_4ths_RH>10 » seen from the player.

Table 1-10. The 10-strings mirrored fourths crossed hands

string:
10

9

8

7

6

5

4

3

2

1

Bass/Melody
B1

B2

B3

B4

B5

M5

M4

M3

M2

M1

pitch row 9
F2

C2

G1

D1

A0

D2

G2

C3

F3

Bb3

pitch open(row 0)
Ab1

Eb1

Bb0

F0

C0

F1

Bb1

Eb2

Ab2

Db3

gauge ” (light)
.022

.028

.044

.065

.092

.025

.016

.012

.009

.008

diameter mm
.56

.71

1.12

1.66

2.34

.64

.41

.31

..23

.20

gauge ” (heavy)
.028

.032

.048

.080

.110

.026

.018

.014

.011

.009

diameter mm
.71

.81

1.22

2.03

2.80

.66

.46

.36

.28

.23

 

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