a whole heap of crap
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3 changed files with 202 additions and 56 deletions
119
run.py
119
run.py
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@ -3,56 +3,79 @@
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from strings import print_ideal_stock
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in_mm = 25.4
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scale_length = 648/in_mm
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default_scale_length = 648/in_mm
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string_sets = {
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'regular light': (
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# (desired note, tension, and type)
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('E4' , 16, 'P'),
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('B3' , 16, 'P'),
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('G3' , 16, 'P'),
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('D3' , 16, 'W'),
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('A2' , 16, 'W'),
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('E2' , 16, 'W'),
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),
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'jazz light': (
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('E4' , 24, 'P'),
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('B3' , 24, 'P'),
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('G3' , 24, 'W'),
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('D3' , 24, 'W'),
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('A2' , 24, 'W'),
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('E2' , 24, 'W'),
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),
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'regular light (DADGAD)': (
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('D4' , 16, 'P'),
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('A3' , 16, 'P'),
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('G3' , 16, 'P'),
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('D3' , 16, 'W'),
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('A2' , 16, 'W'),
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('D2' , 16, 'W'),
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),
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'regular light (open G, 6)': (
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('D4' , 16, 'P'),
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('B3' , 16, 'P'),
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('G3' , 16, 'P'),
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('D3' , 16, 'W'),
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('B2' , 16, 'W'),
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('D2' , 16, 'W'),
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),
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'regular light (open G, 7)': (
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('D4' , 16, 'P'),
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('B3' , 16, 'P'),
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('G3' , 16, 'P'),
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('D3' , 16, 'W'),
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('B2' , 16, 'W'),
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('G2' , 16, 'W'),
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('D2' , 16, 'W'),
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),
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}
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sets = """
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regular light
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E4 16 PD
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B3 16 PD
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G3 16 PD
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D3 16 WD
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A2 16 WD
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E2 16 WD
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print('for a scale length of {:>5.2f} inches'.format(scale_length))
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for name, strings in string_sets.items():
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jazz medium
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E4 24 PD
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B3 24 PD
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G3 24 WD
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D3 24 WD
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A2 24 WD
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E2 24 WD
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regular light (DADGAD)
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D4 16 PD
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A3 16 PD
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G3 16 PD
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D3 16 WD
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A2 16 WD
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D2 16 WD
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fanned-fret bass
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G2 35 WC 34.00
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D2 35 WC 34.75
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A1 35 WC 35.50
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E1 35 WC 36.25
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B0 35 WC 37.00
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regular light (Open G 7-string)
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D4 16 PD
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B3 16 PD
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G3 16 PD
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D3 16 WD
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B2 16 WD
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G2 16 WD
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D2 16 WD
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"""
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string_sets = {}
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sets = sets+'\n\n'
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title = None
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for line in sets.splitlines():
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if not line:
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title = None
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continue
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if not title:
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title = line
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string_sets[title] = []
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else:
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fields = line.split()
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note, tension = fields[0:2]
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tension = int(tension)
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req = ''
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if len(fields) > 2:
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req = fields[2]
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length = None
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if len(fields) > 3:
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length = float(fields[3])
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string = (note, tension, req, length)
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string_sets[title].append(string)
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print('for a scale length of {:>5.2f} inches'.format(default_scale_length))
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for name, strings in sorted(string_sets.items()):
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print()
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print('"{}"'.format(name))
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print_ideal_stock(strings, scale_length)
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print_ideal_stock(strings, default_scale_length)
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84
run2.py
Executable file
84
run2.py
Executable file
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@ -0,0 +1,84 @@
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#!/usr/bin/python
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from strings import print_tensions
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in_mm = 25.4
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default_scale_length = 648/in_mm
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sets = """
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E standard (super light balanced)
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E4 DAPL009
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B3 DAPL012
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G3 DAPL015
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D3 DANW022
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A2 DANW030
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E2 DANW040
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E standard (medium balanced)
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E4 DAPL011
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B3 DAPL015
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G3 DAPL019
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D3 DANW028
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A2 DANW037
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E2 DANW050
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C standard (medium balanced)
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C4 DAPL011
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G3 DAPL015
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D#3 DAPL019
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A#2 DANW028
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F2 DANW037
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C2 DANW050
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C standard (jazz medium)
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C4 DAPL013
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G3 DAPL017
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D#3 DANW026
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A#2 DANW036
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F2 DANW046
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C2 DANW056
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C standard (CKS-G6-14-59mb)
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C4 CKPL014
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G3 CKPL019
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D#3 CKHW025
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A#2 CKHW033
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F2 CKHW045
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C2 CKHW059
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B standard (CKS-G6-14-59mb)
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B3 CKPL014
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F#3 CKPL019
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D3 CKHW025
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A2 CKHW033
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E2 CKHW045
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B1 CKHW059
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D standard drop C (medium balanced)
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D4 DAPL011
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A3 DAPL015
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F3 DAPL019
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C3 DANW028
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G2 DANW037
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C2 DANW050
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"""
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string_sets = {}
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sets = sets+'\n\n'
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title = None
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for line in sets.splitlines():
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if not line:
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title = None
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continue
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if not title:
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title = line
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string_sets[title] = []
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else:
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note, string = line.split()
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string_sets[title].append((note, string))
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print('for a scale length of {:>5.2f} inches'.format(default_scale_length))
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for name, strings in sorted(string_sets.items()):
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print()
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print('"{}"'.format(name))
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print_tensions(strings, default_scale_length)
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55
strings.py
55
strings.py
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@ -6,8 +6,8 @@ from notes import note2freq
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stock = []
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stock += daddario_plain_steel
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stock += daddario_nickle_wound
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#stock += circle_k_plain
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#stock += circle_k_hybrid_wound
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stock += circle_k_plain
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stock += circle_k_hybrid_wound
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uw_const = 386.4
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def uw2tension(uw, freq, SL):
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@ -16,21 +16,39 @@ def uw2tension(uw, freq, SL):
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def tension2uw(t, freq, SL):
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return (t*uw_const)/(2*SL*freq)**2
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outfmt = '{:<8} at {:> 5.2f} lb ({:>+4.2f})'
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finalfmt = 'total: {:>7.2f} lb ({:>+5.2f})'
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outfmt = '\
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{:<8} at {:>6.2f} lb ({:>+4.2f})'
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finalfmt = '\
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average: {:>7.2f} lb ({:>+5.2f})\n\
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total: {:>7.2f} lb ({:>+5.2f})'
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tension_outfmt = '\
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{:<3} {:<8} at {:>6.2f} lb'
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tension_finalfmt = '\
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average: {:>7.2f} lb\n\
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total: {:>7.2f} lb'
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def print_ideal_stock(strings, scale_length=25.512):
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SL = scale_length
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total_tension = 0
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total_desired_tension = 0
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for note, tension, kind in strings:
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for note, tension, req, length in strings:
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freq = note2freq(note)
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if length:
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SL = length
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else:
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SL = scale_length
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uw = tension2uw(tension, freq, SL)
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kind = len(req) > 0 and req[0]
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brand = len(req) > 1 and req[1]
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closest = ('n/a', 0)
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for name, stock_uw in stock:
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if kind == 'P' and name[2] != 'P':
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if kind and kind == 'P' and name[2] != 'P':
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continue
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if kind == 'W' and name[3] != 'W':
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if kind and kind == 'W' and name[3] != 'W':
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continue
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if brand and brand[0] != name[0]:
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continue
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if abs(stock_uw - uw) < abs(closest[1] - uw):
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closest = (name, stock_uw)
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@ -43,7 +61,28 @@ def print_ideal_stock(strings, scale_length=25.512):
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total_desired_tension += tension
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error = total_tension - total_desired_tension
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print(finalfmt.format(total_tension, error))
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average_tension = total_tension/len(strings)
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average_error = error/len(strings)
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print(finalfmt.format(average_tension, average_error, total_tension, error))
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def print_tensions(strings, scale_length=25.512):
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SL = scale_length
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total_tension = 0
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for note, name in strings:
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freq = note2freq(note)
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uw = 0
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for stock_name, stock_uw in stock:
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if name == stock_name or name + '*' == stock_name:
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uw = stock_uw
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break
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if uw:
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tension = uw2tension(uw, freq, SL)
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else:
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tension = 0
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print(tension_outfmt.format(note, name, tension))
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total_tension += tension
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print(tension_finalfmt.format(total_tension/len(strings), total_tension))
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if __name__ == '__main__':
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# DAd's data is all screwy so we use change scale lengths for a best-fit
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