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Connor Olding 2014-09-29 21:47:58 -07:00
parent bb5eabbd56
commit 1fb3df1403
1 changed files with 15 additions and 4 deletions
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19
strings.py
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@ -13,7 +13,7 @@ string_sets = {
('A2' , 16, 'NW'), ('A2' , 16, 'NW'),
('E2' , 16, 'NW'), ('E2' , 16, 'NW'),
), ),
'light jazz': ( 'jazz light': (
('E4' , 24, 'PL'), ('E4' , 24, 'PL'),
('B3' , 24, 'PL'), ('B3' , 24, 'PL'),
('G3' , 24, 'NW'), ('G3' , 24, 'NW'),
@ -29,7 +29,7 @@ string_sets = {
('A2' , 16, 'NW'), ('A2' , 16, 'NW'),
('D2' , 16, 'NW'), ('D2' , 16, 'NW'),
), ),
'open G (6-string)': ( 'regular light (open G, 6)': (
('D4' , 16, 'PL'), ('D4' , 16, 'PL'),
('B3' , 16, 'PL'), ('B3' , 16, 'PL'),
('G3' , 16, 'PL'), ('G3' , 16, 'PL'),
@ -37,7 +37,7 @@ string_sets = {
('B2' , 16, 'NW'), ('B2' , 16, 'NW'),
('D2' , 16, 'NW'), ('D2' , 16, 'NW'),
), ),
'open G (7-string)': ( 'regular light (open G, 7)': (
('D4' , 16, 'PL'), ('D4' , 16, 'PL'),
('B3' , 16, 'PL'), ('B3' , 16, 'PL'),
('G3' , 16, 'PL'), ('G3' , 16, 'PL'),
@ -83,7 +83,7 @@ stock = (
('NW021' , .00008293), ('NW021' , .00008293),
('NW022' , .00009184), ('NW022' , .00009184),
('NW024' , .00010857), ('NW024' , .00010857),
# they have a NW025 used in EXL110BT but it's not listed ('NW025*', .00011875), # from the EXL110BT, an approximation
('NW026' , .00012671), ('NW026' , .00012671),
('NW028' , .00014666), ('NW028' , .00014666),
('NW030' , .00017236), ('NW030' , .00017236),
@ -157,6 +157,8 @@ if False:
test('D3' , 146.83) test('D3' , 146.83)
test('A2' , 110.00) test('A2' , 110.00)
test('E2' , 82.41) test('E2' , 82.41)
import sys
sys.exit(0)
uw_const = 386.4 uw_const = 386.4
def uw2tension(uw, freq): def uw2tension(uw, freq):
@ -165,6 +167,15 @@ def uw2tension(uw, freq):
def tension2uw(t, freq): def tension2uw(t, freq):
return (t*uw_const)/(2*scale_length*freq)**2 return (t*uw_const)/(2*scale_length*freq)**2
if False:
scale_length = 25.4825
D3 = note2freq('D3')
print('NW024 {:10.8f} == 0.00010857'.format(tension2uw(15.73, D3)))
print('NW025* {:10.8f} == ? '.format(tension2uw(17.21, D3)))
print('NW026 {:10.8f} == 0.00012671'.format(tension2uw(18.38, D3)))
import sys
sys.exit(0)
outfmt = '{:<6} at {:> 5.2f} lbs ({:>+4.2f})' outfmt = '{:<6} at {:> 5.2f} lbs ({:>+4.2f})'
finalfmt = 'total: {:>7.2f} lbs ({:>+5.2f})' finalfmt = 'total: {:>7.2f} lbs ({:>+5.2f})'
def print_ideal_stock(strings): def print_ideal_stock(strings):