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chords.py
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chords.py
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# #!/Library/Frameworks/Python.framework/Versions/3.9/bin/python3 # TBD, use python3
'''
Chords
Greg Girardin
girardin1972@hotmail.com
'''
from __future__ import print_function
import os, sys
from functools import partial
if sys.version_info.major == 2:
from Tkinter import *
import tkFont
else:
from tkinter import *
import tkinter.font as tkFont
instrumentMap = {
'Mandolin' : { "t" : ( "E", "A", "D", "G" ), "f" : ( 0, 0, 0, 0 ) },
'Guitar' : { "t" : ( "E", "B", "G", "D", "A", "E" ), "f" : ( 0, 0, 0, 0, 0, 0 ) },
'Dropped D' : { "t" : ( "E", "B", "G", "D", "A", "D" ), "f" : ( 0, 0, 0, 0, 0, 0 ) },
'Bass' : { "t" : ( "G", "D", "A", "E" ), "f" : ( 0, 0, 0, 0 ) },
'5StringBass' : { "t" : ( "G", "D", "A", "E", "B" ), "f" : ( 0, 0, 0, 0, 0 ) },
'Uke' : { "t" : ( "A", "E", "C", "G" ), "f" : ( 0, 0, 0, 0 ) },
'Stick' : { "t" : ( "D", "A", "E", "B", "F#", "C", "G", "D", "A", "E" ), "f" : ( 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ) }, # Classic tuning
'Stick-4ths': { "t" : ("C", "G", "D", "A", "E", "B", "E", "A", "D", "G", "C", "F" ), "f" : ( 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ) },
'Banjo' : { "t" : ( "D", "B", "G", "D", "G" ), "f" : ( 0, 0, 0, 0, 5 ) }
}
# Pick the instruments you care about
instruments = ( 'Guitar', 'Bass', 'Dropped D', 'Uke', 'Mandolin', 'Banjo', '5StringBass', 'Stick', 'Stick-4ths' )
intervals = { "Normal" : ( 'R', 'b2', '2', 'b3', '3', '4', 'b5', '5', 'b6', '6', 'b7', '7' ),
"Extended" : ( 'R', 'b9', '9', 'b3', '3', '11', 'b5', '5', 'b13', '13', 'b7', '7' ),
"Lydian" : ( 'R', 'b2', '2', 'b3', '3', '4', '#4', '5', 'b6', '6', 'b7', '7' ) }
# display with a #/b if that's how we'd display the major key.
dispKeyList = ( 'C', 'Db', 'D', 'Eb', 'E', 'F', 'F#', 'G', 'Ab', 'A', 'Bb', 'B' )
keyListSharps = ( 'C', 'C#', 'D', 'D#', 'E', 'F', 'F#', 'G', 'G#', 'A', 'A#', 'B' )
keyListFlats = ( 'C', 'Db', 'D', 'Eb', 'E', 'F', 'Gb', 'G', 'Ab', 'A', 'Bb', 'B' )
bKeys = ( 'F', 'Bb', 'Eb','Ab', 'Db' ) # keys to be displayed as having flats
# spellingMap is a dictionary of names for the spelling and a tuple of intervals members.
# if you add an entry, also add it to spellings tuple below.
spellingMap = { "major" : ( 'R', '3', '5' ),
"minor" : ( 'R', 'b3', '5' ),
"sus2" : ( 'R', '2', '5' ),
"sus4" : ( 'R', '4', '5' ),
"6" : ( 'R', '3', '5', '6' ),
"m6" : ( 'R', 'b3', '5', '6' ),
"7" : ( 'R', '3', '5', 'b7' ),
"m7" : ( 'R', 'b3', '5', 'b7' ),
"M7" : ( 'R', '3', '5', '7' ),
"9" : ( 'R', '3', '5', 'b7', '9' ),
"m9" : ( 'R', 'b3', '5', 'b7', '9' ),
"M9" : ( 'R', '3', '5', '7', '9' ),
"11" : ( 'R', '3', '5', 'b7', '9', '11' ),
"m11" : ( 'R', 'b3', '5', 'b7', '9', '11' ),
"M11" : ( 'R', '3', '5', '7', '9', '11' ),
"13" : ( 'R', '3', '5', 'b7', '9', '11', '13' ),
"m13" : ( 'R', 'b3', '5', 'b7', '9', '11', '13' ),
"M13" : ( 'R', '3', '5', '7', '9', '11', '13' ),
"dim" : ( 'R', 'b3', 'b5', '6' ),
"m7-5" : ( 'R', 'b3', 'b5', 'b7' ),
"Ionian" : ( 'R', '2', '3', '4', '5', '6', '7' ),
"Dorian" : ( 'R', '2', 'b3', '4', '5', '6', 'b7' ),
"Phrygian" : ( 'R', 'b2', 'b3', '4', '5', 'b6', 'b7' ),
"Lydian" : ( 'R', '2', '3', '#4', '5', '6', '7' ),
"Mixolydian" :( 'R', '2', '3', '4', '5', '6', 'b7' ),
"Aeolian" : ( 'R', '2', 'b3', '4', '5', 'b6', 'b7' ),
"Locrian" : ( 'R', 'b2', 'b3', '4', 'b5', 'b6', 'b7' ),
"Melodic" : ( 'R', '2', 'b3', '4', '5', '6', '7' ),
"Harmonic" : ( 'R', '2', 'b3', '4', '5', 'b6', '7' ),
"Altered" : ( 'R', 'b2', 'b3', '3', 'b5', 'b6', 'b7' ),
"Pent-Min" : ( 'R', 'b3', '4', '5', 'b7' ),
"Pent-Maj" : ( 'R', '2', '3', '5', '6' ),
"mBlues" : ( 'R', 'b3', '4', 'b5', '5', 'b7' ),
"MBlues" : ( 'R', '2', 'b3', '3', '5', '6' ),
}
majHarmMap = { "I" : ( 'R', '3', '5', '7' ),
"ii" : ( '2', '4', '6', 'R' ),
"iii" : ( '3', '5', '7', '2' ),
"IV" : ( '4', '6', 'R', '3' ),
"V" : ( '5', '7', '2', '4' ),
"vi" : ( '6', 'R', '3', '5' ),
"viiDim" : ( '7', '2', '4', '6' ) }
# Pick the spellings (keys in spellingMap above) you care about.
spellings = ( 'major', 'minor', 'sus2', 'sus4', '7', 'm7', 'M7', '9', 'dim', 'm7-5', # chords
'Ionian', 'Dorian', 'Phrygian', 'Lydian', 'Mixolydian', 'Aeolian', 'Locrian', # modes of major scale
'Melodic', 'Harmonic', 'Altered', 'Pent-Min', 'Pent-Maj', 'mBlues', 'MBlues' # other scales
)
extChords = ( '9', 'm9', 'M9', '11', 'm11', 'M11', '13', 'm13', 'M13' )
extIntervals = ( '9', '11', '13' )
minorSpellings = ( 'm', 'm7', 'm9', 'm11', 'm13', 'm-Key', 'Aeolian' )
num_frets = 24
disFont = { 0 : ( "TkFixedFont", 18, "bold italic" ), 1 : ( "TkFixedFont", 14, "" ) }
class runGui():
def showWithSharps( self, key, spelling ):
# return True if we should show this key/spelling as having sharps (vs flats)
def relMajor( key, off=3 ):
# input is a minor key, returns the relative major key
index = ( dispKeyList.index( key ) + off ) % 12
key = dispKeyList[ index ]
return key
if spelling in( 'mBlues', 'MBlues' ): # Blues is always flats
return False
if spelling == "Dorian":
key = relMajor( key, 10 )
elif spelling == "Phrygian":
key = relMajor( key, 8 )
elif spelling == "Lydian":
key = relMajor( key, 7 )
elif spelling == "Mixolydian":
key = relMajor( key, 5 )
elif spelling == "Locrian":
key = relMajor( key, 1 )
elif spelling in minorSpellings:
key = relMajor( key )
return key not in bKeys
def calcNote( self, root, fret ):
rootNum = ( dispKeyList.index( root ) + fret ) % 12
return dispKeyList[ rootNum ]
def calcInterval( self, note, key ):
noteNum = dispKeyList.index( note ) + 12 # C = 12, C# = 13, etc
keyNum = dispKeyList.index( key ) # C = 0, C# = 1
intNum = ( noteNum - keyNum ) % 12 # (if C) C = 0, C# = 1
return intNum
def fretInfoGen( self, root, fret, fretOffset ):
'''
Generate a dictionary entry about the given fret.
root is the string's fretOffset fret note. Usually fret 0 (open).
fret is the fret number relative to a zero offset string note is the text of the note
'''
assert fret >= fretOffset, "Fret below fret offset."
fretInfo = { 'root' : root,
'fret' : fret,
'note' : self.calcNote( root, fret - fretOffset ) }
interval = self.calcInterval( fretInfo[ 'note' ], self.key )
OLinterval = self.calcInterval( fretInfo[ 'note' ], self.OLkey )
x = "Normal"
if self.spelling in extChords:
x = "Extended"
elif self.spelling == 'Lydian':
x = "Lydian"
fretInfo[ 'interval' ] = intervals[ x ][ interval ]
fretInfo[ 'inSpelling' ] = intervals[ x ][ interval ] in spellingMap[ self.spelling ]
fretInfo[ 'inOLSpelling' ] = intervals[ x ][ OLinterval ] in spellingMap[ self.OLspelling ]
# convert note for display
curKeyList = keyListSharps if self.showWithSharps( self.key, self.spelling ) else keyListFlats
fretInfo[ 'note' ] = curKeyList[ dispKeyList.index( fretInfo[ 'note' ] ) ]
return fretInfo
def generateFretboard( self ):
'''
Returns a dictionary with everything we care about
strings are keyed by string number (1 - N) and contain a list of dictionaries for each fret
There are also some other 'global' kinda things.. numStrings, instrument, etc.
This could be removed. There is no reason to generate the fretboard in advance,
just generate frets on the fly while displaying.
'''
strings = instrumentMap[ self.instrument ][ 't' ]
fretBoard = { 'numStrings' : len( strings ),
'instrument' : self.instrument,
'spelling' : self.spelling,
'fretOffset' : instrumentMap[ self.instrument ][ 'f' ] }
for string in range( 1, len( strings ) + 1 ):
stringList = []
rootNote = strings[ string - 1 ]
offset = instrumentMap[ self.instrument ][ 'f' ][ string - 1 ]
for fret in range( offset, num_frets + 1 ):
fretInfo = self.fretInfoGen( rootNote, fret, offset )
stringList.append( fretInfo )
fretBoard[ string ] = stringList
return fretBoard
def displayFretboards( self ):
fretboard = self.generateFretboard()
numStrings = fretboard[ 'numStrings' ]
LEFT_BORDER = 30
STR_SPC = 20
FRET_SPACING = 30
FRET_NUM_VERT_OFFSET = 20
FRET1_TOP = FRET_NUM_VERT_OFFSET + 20
FRET1_BOTTOM = FRET1_TOP + ( numStrings - 1 ) * STR_SPC
FRET2_TOP = FRET1_BOTTOM + 40
FRET2_BOTTOM = FRET2_TOP + ( numStrings - 1 ) * STR_SPC
STRING_LEFT = LEFT_BORDER + 10
STRING_RIGHT = STRING_LEFT + ( num_frets + 1 ) * FRET_SPACING
HIDE_RAD = 9 # Hide radius
self.canvas.delete( ALL )
# Draw fret numbers and frets
for fret in range( 0, num_frets + 1 ):
xPos = LEFT_BORDER + FRET_SPACING + fret * FRET_SPACING
txt = str( fret )
self.canvas.create_text( xPos - STR_SPC / 2, FRET_NUM_VERT_OFFSET, text=txt, fill="black" ) # Fretboard numbering
w = 1 if fret else 4
if fret == 12:
w = 2
self.canvas.create_rectangle( xPos, FRET1_TOP, xPos + w + 1, FRET1_BOTTOM, fill="black" )
self.canvas.create_rectangle( xPos, FRET2_TOP, xPos + w + 1, FRET2_BOTTOM, fill="black" )
for fretInd in( 3, 5, 7, 9, 12, 15, 17 ):
xPos = LEFT_BORDER + FRET_SPACING / 2 + fretInd * FRET_SPACING
if fretInd == 12:
yPos = ( FRET1_TOP + FRET1_BOTTOM ) / 3 # put 1/3 from top / bottom
self.canvas.create_oval( xPos - 4, yPos - 4, xPos + 4, yPos + 4,fill="black" )
yPos = ( FRET1_TOP + FRET1_BOTTOM ) * 2/3
self.canvas.create_oval( xPos - 4, yPos - 4, xPos + 4, yPos + 4,fill="black" )
else:
yPos = ( FRET1_TOP + FRET1_BOTTOM ) / 2 # put in the middle
self.canvas.create_oval( xPos - 4, yPos - 4, xPos + 4, yPos + 4,fill="black" )
# Draw strings
for s in range( 0, numStrings ):
self.canvas.create_text( STRING_LEFT - 20, FRET1_TOP + s * STR_SPC, text=fretboard[ s + 1 ][ 0 ][ 'root'], fill="black" )
self.canvas.create_text( STRING_LEFT - 20, FRET2_TOP + s * STR_SPC, text=fretboard[ s + 1 ][ 0 ][ 'root'], fill="black" )
self.canvas.create_line( STRING_LEFT, FRET1_TOP + s * STR_SPC, STRING_RIGHT, FRET1_TOP + s * STR_SPC, fill="black" )
self.canvas.create_line( STRING_LEFT, FRET2_TOP + s * STR_SPC, STRING_RIGHT, FRET2_TOP + s * STR_SPC, fill="black" )
# Populate individual frets
for stringNum in range( 0, numStrings ):
string = fretboard[ stringNum + 1 ]
for fret in string:
if fret[ 'interval' ] in extIntervals and stringNum > ( numStrings / 2 ):
continue # Don't display ext intervals on bass strings
xPos = LEFT_BORDER + FRET_SPACING / 2 + fret[ 'fret' ] * FRET_SPACING
yPos = FRET1_TOP + stringNum * STR_SPC
fill = None
if self.overlay:
if fret[ 'inSpelling' ] and fret[ 'inOLSpelling' ]:
fill="#8ff" # blue-green if in both
else:
if fret[ 'inSpelling' ]:
fill="#f88" # red-ish
elif fret[ 'inOLSpelling' ]:
fill="#88f" # blue-ish
elif fret[ 'inSpelling' ]:
fill="#f88"
if fill:
self.canvas.create_oval( xPos - HIDE_RAD, yPos - HIDE_RAD, xPos + HIDE_RAD, yPos + HIDE_RAD, fill=fill )
self.canvas.create_text( xPos, yPos, text=fret[ 'note' ], fill="black" )
# Bottom fretboard is just Chord 1's intervals.
if fret[ 'inSpelling' ]:
yPos = FRET2_TOP + stringNum * STR_SPC
if fret[ 'interval' ] == 'R':
self.canvas.create_oval( xPos - 5, yPos - 5, xPos + 5, yPos + 5, fill="black" )
else:
self.canvas.create_oval( xPos - HIDE_RAD, yPos - HIDE_RAD, xPos + HIDE_RAD, yPos + HIDE_RAD,
fill="white", outline="black" ) # erase
self.canvas.create_text( xPos, yPos, text=fret[ 'interval' ], fill="black" )
def instrumentChange( self, *args ):
self.instrument = self.inst.get()
self.displayFretboards( )
def keyChange( self, *args ):
self.key = self.keysVar.get()
self.displayFretboards( )
def OLkeyChange( self, *args ):
self.OLkey = self.OLkeysVar.get()
self.displayFretboards( )
def spellingChange( self, *args ):
self.spelling = self.spellingVar.get()
self.displayFretboards( )
def OLspellingChange( self, *args ):
self.OLspelling = self.OLspellingVar.get()
self.displayFretboards( )
def overlayToggle( self ):
self.overlay = not self.overlay
self.overlayTxt.set( "-" if self.overlay else "+" )
if self.overlay:
self.OLkeysMenu[ "state" ] = "normal"
self.OLspellingMenu[ "state" ] = "normal"
else:
self.OLkeysMenu[ "state" ] = "disable"
self.OLspellingMenu[ "state" ] = "disable"
self.displayFretboards()
def initMainframe( self ):
self.inst = StringVar()
self.inst.set( instruments[ 0 ] )
self.inst.trace( 'w', self.instrumentChange )
self.keysVar = StringVar()
self.keysVar.set( dispKeyList[ 0 ] )
self.keysVar.trace( 'w', self.keyChange )
self.spellingVar = StringVar()
self.spellingVar.set( spellings[ 0 ] )
self.spellingVar.trace( 'w', self.spellingChange )
self.overlayTxt = StringVar()
self.overlayTxt.set( "+" )
self.notesFrets = StringVar()
self.notesFrets.set( "Notes" )
self.OLkeysVar = StringVar()
self.OLkeysVar.set( dispKeyList[ 0 ] )
self.OLkeysVar.trace( 'w', self.OLkeyChange )
self.OLspellingVar = StringVar()
self.OLspellingVar.set( spellings[ 0 ] )
self.OLspellingVar.trace( 'w', self.OLspellingChange )
def displayMainframe( self ):
for widget in self.mainFrame.winfo_children():
widget.destroy()
self.instMenu = OptionMenu( self.mainFrame, self.inst, *instruments )
self.instMenu.config( fg="BLACK" )
self.instMenu.pack( side=LEFT )
self.keysMenu = OptionMenu( self.mainFrame, self.keysVar, *dispKeyList )
self.keysMenu.config( fg="BLACK" )
self.keysMenu.pack( side=LEFT )
self.spellingMenu = OptionMenu( self.mainFrame, self.spellingVar, *spellings )
self.spellingMenu.config( fg="BLACK" )
self.spellingMenu.pack( side=LEFT )
self.overLayButton = Button( self.mainFrame,
textvariable=self.overlayTxt,
font=disFont[ 1 ],
command=self.overlayToggle,
fg = "BLACK")
self.overLayButton.pack( side=LEFT )
self.OLkeysMenu = OptionMenu( self.mainFrame, self.OLkeysVar, *dispKeyList )
self.OLkeysMenu.config( fg="BLACK" )
self.OLkeysMenu.pack( side=LEFT )
self.OLspellingMenu = OptionMenu( self.mainFrame, self.OLspellingVar, *spellings )
self.OLspellingMenu.config( fg="BLACK" )
self.OLspellingMenu.pack( side=LEFT )
self.OLkeysMenu[ "state" ] = "disable"
self.OLspellingMenu[ "state" ] = "disable"
def __init__( self ):
self.instrument = instruments[ 0 ]
self.key = dispKeyList[ 0 ]
self.spelling = spellings[ 0 ]
self.OLkey = dispKeyList[ 0 ] # Overlay
self.OLspelling = spellings[ 0 ]
self.overlay = False
root = Tk()
root.title( "Chords" )
self.mainFrame = Frame( root )
self.mainFrame.pack( side=TOP )
self.initMainframe()
self.displayMainframe()
self.fretboardFrame = Frame( root )
self.fretboardFrame.pack( side=TOP )
self.canvas = Canvas( self.fretboardFrame, width=800, height=600 )
self.canvas.pack()
self.displayFretboards()
root.mainloop()
runGui()