import random

score = open('C:\csound\csds\oscil contest.sco','w')

random.seed(1)

noteStart   = 0.1
noteDur     = 0.2
noteVol     = 0
noteFstr    = 0
noteFend    = 0
noteAtt     = 0
notePstr    = 0
notePend    = 0
lowFrqLimit = 40
highFrqLimit = 16000
i           = 0

def addNote(nStr,nDur,nVol,nFstr,nFend,nAtt,nPstr,nPend):
    nFend = int(nFend)
    note = 'i1\t %f \t %f \t %d \t %d \t %d \t %.3f \t %.3f \t %.3f \n' % (nStr,nDur,nVol,nFstr,nFend,nAtt,nPstr,nPend)
    score.write(note)


# First Section (many grains to descrete notes #    
score.write('\n;Section 1;\n\n')

while i < 150:
    noteStart   *= 1.03
    noteDur     *= 1.005
    noteVol     = random.randint(2000,10000)
    noteFstr    = random.randint(lowFrqLimit,highFrqLimit)
    noteFend    = noteFstr * random.random()
    noteAtt     = noteDur * 0.5
    notePstr    = 0.001 * random.randint(0,1000)
    notePend    = 0.001 * random.randint(0,1000)
    addNote(noteStart,noteDur,noteVol,noteFstr,noteFend,noteAtt,notePstr,notePend)
    i += 1

# Second Section Frequency range narrows to 441 
score.write('\n;Section 2;\n\n')

while lowFrqLimit < highFrqLimit:
    noteStart   += random.random()
    noteDur     *= 1.01
    noteVol     = random.randint(3000,15000)
    noteFstr    =  random.randint(int(lowFrqLimit),int(highFrqLimit))
    noteFend    =  noteFstr
    noteAtt     =  noteDur * 0.5
    notePstr    =  0.001 * random.randint(0,1000)
    notePend    =  notePstr
    addNote(noteStart,noteDur,noteVol,noteFstr,noteFend,noteAtt,notePstr,notePend)
    lowFrqLimit *= 1.05
    highFrqLimit *= 0.93

while lowFrqLimit > highFrqLimit:
    noteStart   += random.random()
    noteDur     *= 1.03
    noteVol     = random.randint(3000,15000)
    noteFstr    =  random.randint(int(highFrqLimit),int(lowFrqLimit))
    noteFend    =  noteFstr
    noteAtt     =  noteDur * 0.5
    notePstr    =  0.001 * random.randint(0,1000)
    notePend    =  notePstr
    addNote(noteStart,noteDur,noteVol,noteFstr,noteFend,noteAtt,notePstr,notePend)
    lowFrqLimit *= 0.997
    highFrqLimit *= 1.003

#Third Section Cloud of harmonics on 441 
score.write('\n;Section 3;\n')
score.write(';Fundamental\n')

i = 0
while i<100:
    noteStart   += random.random() + random.random()
    if i<50:
        noteDur *= 1.01
    else:
        noteDur *= 0.99  
    noteVol     = random.randint(3000,8000)
    noteFstr    =  441
    noteFend    =  441
    noteAtt     =  noteDur * 0.5
    notePstr    =  0.001 * random.randint(0,1000)
    notePend    =  notePstr
    addNote(noteStart,noteDur,noteVol,noteFstr,noteFend,noteAtt,notePstr,notePend)
    i += 1
    
score.write('\n\n;Harmonics\n')
noteStart = 42
i = 0 
frqList = [55.125,110.25,220.5,882,1323,1764,2205,2646,3087,3528,3969,4410,
           4851,5292,5733,6174,6615,7056,7497,7938,8379,8820,9261,9702,10143]

while i<90:
    noteStart   += random.randint(0,2) + random.random()
    if i<12:
        noteDur     = random.randint(0,4) + random.random()
    elif i<25:
        noteDur     = random.randint(1,5) + random.random()
    elif i<37:
        noteDur     = random.randint(2,6) + random.random()
    elif i<50:
        noteDur     = random.randint(3,7) + random.random()
    else:
        noteDur     = random.randint(4,8) + random.random()
    noteVol     = random.randint(3000,8000)
    noteFstr    = random.choice(frqList)
    noteFend    = noteFstr
    noteAtt     = noteDur * 0.3
    notePstr    =  0.001 * random.randint(0,1000)
    notePend    =  notePstr
    addNote(noteStart,noteDur,noteVol,noteFstr,noteFend,noteAtt,notePstr,notePend)
    i += 1

#Fourth Section Growing Grain cloud on harmonics of 441
score.write('\n;Section 4.0\n')
i = 0
frqList.append(441)
noteStartDecrement = 1
noteStart = 142
noteDur = 1
while i < 250:
    noteStart   = noteStart + noteStartDecrement
    noteDur     *= 0.999
    noteVol     = random.randint(2000,5000)
    noteFstr    = random.choice(frqList)
    noteFend    = noteFstr
    noteAtt     = noteDur * 0.5
    notePstr    = 0.001 * random.randint(0,1000)
    notePend    = 0.001 * random.randint(0,1000)
    addNote(noteStart,noteDur,noteVol,noteFstr,noteFend,noteAtt,notePstr,notePend)
    i += 1
    noteStartDecrement *= 0.98

score.write('\n;Section 4.1\n')
noteStartGap = noteStartDecrement
while noteDur > 0.21:
    noteStart = noteStart + noteStartGap
    noteDur     *= 0.999
    noteVol     = random.randint(2000,5000)
    noteFstr    = random.choice(frqList)
    noteFend    = noteFstr
    noteAtt     = noteDur * 0.5
    notePstr    = 0.001 * random.randint(0,1000)
    notePend    = 0.001 * random.randint(0,1000)
    addNote(noteStart,noteDur,noteVol,noteFstr,noteFend,noteAtt,notePstr,notePend)

score.write('\n;Section 4.2\n')
i = 0
while i < 2000:
    noteStart = noteStart + noteStartGap
    if i < 250:
        noteVol     = random.randint(2000,8000)
    elif i < 500:
        noteVol     = random.randint(2000,7000)
    elif i < 750:
        noteVol     = random.randint(2000,6000)
    elif i < 1000:
        noteVol     = random.randint(2000,5000)
    elif i < 1250:
        noteVol     = random.randint(1500,4000)
    elif i < 1500:
        noteVol     = random.randint(1000,3000)
    elif i < 1750:
        noteVol     = random.randint(500,2000)
    else:
        noteVol     = random.randint(10,1000)
    noteFstr    = random.choice(frqList)
    noteFend    = noteFstr
    noteAtt     = noteDur * 0.5
    notePstr    = 0.001 * random.randint(0,1000)
    notePend    = 0.001 * random.randint(0,1000)
    addNote(noteStart,noteDur,noteVol,noteFstr,noteFend,noteAtt,notePstr,notePend)
    i += 1

score.write('\n\ne\n')

score.close()