Scales
A: 1-20 logarithmic scale
B: 1-20 logarithmic scale
T: logarithmic scale from 0-90
ST: logarithmic scale 0.56-5.73
S: logarithmic scale from 0-90
K: 1-30 logarithmic scale
D: 1-10 logarithmic scale with notation at pi
DF: folded scale ranging from pi-10 and then 1-pi
CF: folded scale ranging from pi-10 and then 1-pi
CIF: descending logarithmic scale pi-1 followed by 10-pi
CI: descending logarithmic scale 10-1
C: 1-10 logarithmic scale with notation for pi
L: 1-10 linear scale