# 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()