How to use the pyo.Clean_objects function in pyo

def ex3():
    from pyo import Disto, SfPlayer, Clean_objects, DEMOS_PATH
    print """
Multiband distortion:

o_ex1 = SfPlayer(DEMOS_PATH + "/transparent.aif", loop=True, mul=.5)
o_ex2 = BandSplit(o_ex1, num=4, min=250, max=5000, q=2)
o_ex3 = Disto(o_ex2, drive=[0.98, 0, 0, 0.99], mul=.06125).out()
"""
    o_ex1 = SfPlayer(DEMOS_PATH + "/transparent.aif", loop=True, mul=.5)
    o_ex2 = BandSplit(o_ex1, num=4, min=250, max=5000, q=2)
    o_ex3 = Disto(o_ex2, drive=[0.98, 0, 0, 0.99], mul=.06125).out()

    c = Clean_objects(4, o_ex1, o_ex2, o_ex3)
    c.start()

def ex1():
    from pyo import LinTable, Metro, TrigEnv, Clean_objects
    print """
Simple plucked string:

t_ex1 = LinTable([(0,0), (2,1), (5,0), (8191,0)])
o_ex1 = Metro().play()
o_ex2 = TrigEnv(o_ex1, t_ex1, 1)
o_ex3 = Waveguide(o_ex2, freq=[200,200.5], dur=20, minfreq=20, mul=.5).out()
"""
    t_ex1 = LinTable([(0,0), (2,1), (5,0), (8191,0)])
    o_ex1 = Metro().play()
    o_ex2 = TrigEnv(o_ex1, t_ex1, 1)
    o_ex3 = Waveguide(o_ex2, freq=[200,200.5], dur=20, minfreq=20, mul=.5).out()

    c = Clean_objects(4, o_ex1, o_ex2, o_ex3, t_ex1)
    c.start()

print """
Simple plucked string, with vibrato:

t_ex1 = LinTable([(0,0), (2,1), (5,0), (8191,0)])
o_ex1 = Metro().play()
o_ex2 = TrigEnv(o_ex1, t_ex1, 1)
o_ex3 = Sine(3, 0, 3, [200, 200.5])
o_ex4 = Waveguide(o_ex2, freq=o_ex3, dur=20, minfreq=20, mul=.5).out()
"""
    t_ex1 = LinTable([(0,0), (2,1), (5,0), (8191,0)])
    o_ex1 = Metro().play()
    o_ex2 = TrigEnv(o_ex1, t_ex1, 1)
    o_ex3 = Sine(3, 0, 3, [200, 200.5])
    o_ex4 = Waveguide(o_ex2, freq=o_ex3, dur=20, minfreq=20, mul=.5).out()

    c = Clean_objects(4, o_ex1, o_ex2, o_ex3, o_ex4, t_ex1)
    c.start()

def ex1():
    from pyo import Noise, Clean_objects
    print """
Amplitude fadein and fadeout:

o_ex1 = Fader(fadein=.75, fadeout=.75, dur=4, mul=.5).play()
o_ex2 = Noise(mul=o_ex1).out()
"""
    o_ex1 = Fader(fadein=.75, fadeout=.75, dur=4, mul=.5).play()
    o_ex2 = Noise(mul=o_ex1).out()

    c = Clean_objects(4, o_ex1, o_ex2)
    c.start()

def ex5():
    from pyo import Noise, Sine, Clean_objects
    print """
Bandpass filter with moving Q:

o_ex1 = Noise()
o_ex2 = Sine(freq=1, mul=10, add=11)
o_ex3 = Biquad(o_ex1, freq=1000, q=o_ex2, type=2).out()
"""
    o_ex1 = Noise()
    o_ex2 = Sine(freq=1, mul=10, add=11)
    o_ex3 = Biquad(o_ex1, freq=1000, q=o_ex2, type=2).out()

    c = Clean_objects(4, o_ex1, o_ex2, o_ex3)
    c.start()

def ex3():
    from pyo import Sine, Clean_objects
    print """
Ring modulation on input signal:

o_ex1 = Sine([150, 300])
o_ex2 = Input(chnl=0, mul=o_ex1).out()
"""
    o_ex1 = Sine([150, 300])
    o_ex2 = Input(chnl=0, mul=o_ex1).out()

    c = Clean_objects(4, o_ex1, o_ex2)
    c.start()

def ex3():
    from pyo import Sine, SfPlayer, Clean_objects, DEMOS_PATH
    print """
Reverb with changing room size:

o_ex1 = SfPlayer(DEMOS_PATH + '/transparent.aif', loop=True, mul=.5)
o_ex2 = Sine(freq=0.75, mul=0.5, add=0.5)
o_ex3 = Freeverb(o_ex1, size=o_ex2, damp=1, bal=.5).out()
"""
    o_ex1 = SfPlayer(DEMOS_PATH + '/transparent.aif', loop=True, mul=.5)
    o_ex2 = Sine(freq=0.75, mul=0.5, add=0.5)
    o_ex3 = Freeverb(o_ex1, size=o_ex2, damp=1, bal=.5).out()

    c = Clean_objects(4, o_ex1, o_ex2, o_ex3)
    c.start()

def ex2():
    from pyo import SfPlayer, Clean_objects, DEMOS_PATH
    print """
Delay with feedback:

o_ex1 = SfPlayer(DEMOS_PATH + '/transparent.aif', loop=True, mul=.5).out()
o_ex2 = Delay(o_ex1, .250, 0.75, 1).out()
"""
    o_ex1 = SfPlayer(DEMOS_PATH + '/transparent.aif', loop=True, mul=.5).out()
    o_ex2 = Delay(o_ex1, .250, 0.75, 1).out()

    c = Clean_objects(4, o_ex1, o_ex2)
    c.start()

def ex1():
    from pyo import SfPlayer, Clean_objects, DEMOS_PATH
    print """
Small romm:

o_ex1 = SfPlayer(DEMOS_PATH + '/transparent.aif', loop=True, mul=.5)
o_ex2 = Freeverb(o_ex1, size=.25, damp=.7, bal=.4).out()
"""
    o_ex1 = SfPlayer(DEMOS_PATH + '/transparent.aif', loop=True, mul=.5)
    o_ex2 = Freeverb(o_ex1, size=.25, damp=.7, bal=.4).out()

    c = Clean_objects(4, o_ex1, o_ex2)
    c.start()

def ex3():
    from pyo import Sine, Clean_objects
    print """
Frequency attack and decay:

o_ex1 = Fader(fadein=.15, fadeout=.15, dur=4, mul=100, add=900).play()
o_ex2 = Fader(fadein=.05, fadeout=.05, dur=4, mul=.5).play()
o_ex3 = Sine(freq=o_ex1, mul=o_ex2).out()
"""
    o_ex1 = Fader(fadein=.15, fadeout=.15, dur=4, mul=100, add=900).play()
    o_ex2 = Fader(fadein=.05, fadeout=.05, dur=4, mul=.5).play()
    o_ex3 = Sine(freq=o_ex1, mul=o_ex2).out()

    c = Clean_objects(4, o_ex1, o_ex2, o_ex3)
    c.start()