You need the Python tkSnack module to play notes of a given frequency and duration on your external sound system (attached to the PC's sound card). The code snippet gives just a tiny hint about the capabilities of tkSnack. It works with Tkinter, normally part of the Python installation. The module comes to you courtesy of the researchers at KTH and the University of Stockholm in Sweden. More information is at their website http://www.speech.kth.se/snack/
Play a Musical Note (Python)
# play a note of a given frequency and duration via the PC sound card
# needs Python module tkSnack developed at KTH in Stockholm, Sweden
# free download: snack229-py.zip
# from: http://www.speech.kth.se/snack/
# on my system I copied tkSnack.py to D:\Python24\Lib and the folder snacklib to D:\Python24\tcl
# tested with Python24 vegaseat 28oct2005
"""
Frequency Note Table:
Frequency Note MIDI#
27.5000 A0 21
29.1352 A#0 22
30.8677 B0 23
32.7032 C1 24
34.6478 C#1 25 # C#1 = C1 * 1.059463094
36.7081 D1 26 # 1.059463094 = 12th root of 2
38.8909 D#1 27
41.2034 E1 28
43.6535 F1 29
46.2493 F#1 30
48.9994 G1 31
51.9131 G#1 32
55.0000 A1 33
58.2705 A#1 34
61.7354 B1 35
65.4064 C2 36
69.2957 C#2 37
73.4162 D2 38
77.7817 D#2 39
82.4069 E2 40
87.3071 F2 41
92.4986 F#2 42
97.9989 G2 43
103.8262 G#2 44
110.0000 A2 45
116.5409 A#2 46
123.4708 B2 47
130.8128 C3 48
138.5913 C#3 49
146.8324 D3 50
155.5635 D#3 51
164.8138 E3 52
174.6141 F3 53
184.9972 F#3 54
195.9977 G3 55
207.6523 G#3 56
220.0000 A3 57
233.0819 A#3 58
246.9417 B3 59
261.6256 C4 60
277.1826 C#4 61
293.6648 D4 62
311.1270 D#4 63
329.6276 E4 64
349.2282 F4 65
369.9944 F#4 66
391.9954 G4 67
415.3047 G#4 68
440.0000 A4 69
466.1638 A#4 70
493.8833 B4 71
523.2511 C5 72
554.3653 C#5 73
587.3295 D5 74
622.2540 D#5 75
659.2551 E5 76
698.4565 F5 77
739.9888 F#5 78
783.9909 G5 79
830.6094 G#5 80
880.0000 A5 81
932.3275 A#5 82
987.7666 B5 83
1046.5023 C6 84
1108.7305 C#6 85
1174.6591 D6 86
1244.5079 D#6 87
1318.5102 E6 88
1396.9129 F6 89
1479.9777 F#6 90
1567.9817 G6 91
1661.2188 G#6 92
1760.0000 A6 93
1864.6550 A#6 94
1975.5332 B6 95
2093.0045 C7 96
2217.4610 C#7 97
2349.3181 D7 98
2489.0159 D#7 99
2637.0205 E7 100
2793.8259 F7 101
2959.9554 F#7 102
3135.9635 G7 103
3322.4376 G#7 104
3520.0000 A7 105
3729.3101 A#7 106
3951.0664 B7 107
4186.0090 C8 108
"""
import Tkinter
import tkSnack
def setVolume(volume=50):
"""set the volume of the sound system"""
if volume > 100:
volume = 100
elif volume < 0:
volume = 0
tkSnack.audio.play_gain(volume)
def playNote(freq, duration):
"""play a note of freq (hertz) for duration (seconds)"""
snd = tkSnack.Sound()
filt = tkSnack.Filter('generator', freq, 30000, 0.0, 'sine', int(11500*duration))
snd.stop()
snd.play(filter=filt, blocking=1)
def soundStop():
"""stop the sound the hard way"""
try:
root = root.destroy()
filt = None
except:
pass
root = Tkinter.Tk()
# have to initialize the sound system, required!!
tkSnack.initializeSnack(root)
# set the volume of the sound system (0 to 100%)
setVolume(30)
# play a note of requency 440 hertz (A4) for a duration of 5 seconds
playNote(440, 5)
# play a note of requency 261.6 hertz (C4) for a duration of 5 seconds
playNote(261.6, 5)
# optional
soundStop()
root.withdraw()
Alex Sarria 0 Newbie Poster
Firs at all, I'm sorry: my English is not good. I'm using Ubuntu Linux 10.04 and downloaded tkSnack without problem but, after running your code, appears an error: "UNRESOLVED IMPORT: tkSnack". Please, What should I do?
vegaseat 1,735 DaniWeb's Hypocrite Team Colleague
On Linux you have to install tkSnack into directories that Python is looking into.
# show the system path for Python = PYTHONPATH
import sys
print sys.path Layra 0 Newbie Poster
I went and looked up the tksnack from the website posted and the latest version is for Python 2.2. Considering Python latest is 3.1, will this library still work? I'm very interested in this for my final project and would prefer to use this or something similar / more up to date.
Thanks.
Gribouillis 1,391 Programming Explorer Team Colleague
I went and looked up the tksnack from the website posted and the latest version is for Python 2.2. Considering Python latest is 3.1, will this library still work? I'm very interested in this for my final project and would prefer to use this or something similar / more up to date.
Thanks.
Apparently, a very small part of snack is written in python (20k) and this part contains basic interaction with tkinter, so if it does not work with python 3, it should be relatively easy to adapt it. On the snack site http://www.speech.kth.se/snack/ there is a link to another program called WaveSurfer http://www.speech.kth.se/wavesurfer/ which uses snack and which last release was 1 month ago. Wavesurfer is described in this wikipedia page http://en.wikipedia.org/wiki/WaveSurfer, and apparently wavesurfer accepts plugins (in python ? it's worth exploring this direction).
Anyway, the existence of wavesurfer proves that snack still works in 2011.
vegaseat 1,735 DaniWeb's Hypocrite Team Colleague
See:
"Getting tkSnack sound module to work with Python3"
http://www.daniweb.com/software-development/python/code/357467
Layra 0 Newbie Poster
See:
"Getting tkSnack sound module to work with Python3"
http://www.daniweb.com/software-development/python/code/357467
Yep, I just found this link -- thank's for the confirmation! Now only to get the environment setup correctly and I'll be all set. Thanks a bunch to both of you!
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