So, I've followed this question in order to get some sound playing with Music21, and here's the code:
from music21 import *
import random
def main():
# Set up a detuned piano
# (where each key has a random
# but consistent detuning from 30 cents flat to sharp)
# and play a Bach Chorale on it in real time.
keyDetune = []
for i in range(0, 127):
keyDetune.append(random.randint(-30, 30))
b = corpus.parse('bach/bwv66.6')
for n in b.flat.notes:
n.microtone = keyDetune[n.midi]
sp = midi.realtime.StreamPlayer(b)
sp.play()
return 0
if __name__ == '__main__':
main()
And here's the traceback:
Traceback (most recent call last):
File "main.py", line 49, in <module>
main()
File "main.py", line 44, in main
sp.play()
File "G:\Development\Python Development\Anaconda3\lib\site-packages\music21\mi
di\realtime.py", line 104, in play
streamStringIOFile = self.getStringIOFile()
File "G:\Development\Python Development\Anaconda3\lib\site-packages\music21\mi
di\realtime.py", line 110, in getStringIOFile
return stringIOModule.StringIO(streamMidiWritten)
AttributeError: type object '_io.StringIO' has no attribute 'StringIO'
Press any key to continue . . .
I'm running Python 3.4 x86 (Anaconda Distribution) on Windows 7 x64. I have no idea on how to fix this (But probably is some obscure Python 2.x to Python 3.x incompatibility issue, as always)
EDIT:
I've edited the import as suggested in the answer, and now I got a TypeError:
What would you recommend me to do as an alternative to "play some audio" with Music21? (Fluidsynth or whatever, anything).
You may be right... I think the error may actually be in Music21, with the way it handles importing StringIO
Python 2 has StringIO.StringIO
, whereas
Python 3 has io.StringIO
..but if you look at the import statement in music21\midi\realtime.py
try:
import cStringIO as stringIOModule
except ImportError:
try:
import StringIO as stringIOModule
except ImportError:
from io import StringIO as stringIOModule
The last line is importing io.StringIO
, and so later on the call to stringIOModule.StringIO()
fails because it's actually calling io.StringIO.StringIO
.
I would try to edit the import statement to:
except ImportError:
import io as stringIOModule
And see if that fixes it.