Minim 7. Play A File

An AudioPlayer object is used to play the same mp3 file as in the last example. We have to put the groove.mp3 file in this sketch's data folder.

By pressing any key we can pause audio (if playing) or start (if paused or finished).

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# Ex7.pyde
# Based on Java File in Examples: PlayAFile.pde

'''
This sketch demonstrates how to play a file with Minim
using an AudioPlayer. It's also a good example of how
to draw the waveform of the audio. Full documentation
for AudioPlayer can be found at http://
code.compartmental.net/minim/
audioplayer_class_audioplayer.html
For more information about Minim and additional features,
visit http://code.compartmental.net/minim/
'''

add_library('minim')

player = None

def setup():
    size(1024, 200)
    global player
    minim = Minim(this)
    player = minim.loadFile("groove.mp3")
    
def draw():
    background(0)
    stroke(255)
    # draw the waveforms
    # the values returned by left.get() and right.get()
    # will be between -1 and 1, so we need to scale them
    # up to see the waveform. Note that if the file is
    # MONO, left.get() and right.get() will return the
    # same value
    for i in range(player.bufferSize()-1):
        x1 = map(i, 0, player.bufferSize(), 0, width)
        x2 = map(i+1, 0, player.bufferSize(), 0, width)
        line( x1, 50 + player.left.get(i)*50, 
             x2, 50 + player.left.get(i+1)*50 )
        line( x1, 150 + player.right.get(i)*50,
             x2, 150 + player.right.get(i+1)*50)
    posx = map(player.position(), 0, player.length(),
               0, width)
    stroke(0,200,0)
    line(posx, 0, posx, height)
    if player.isPlaying():
        text("Press any key to pause playback.", 10, 20)
    else:
        text("Press any key to start playback.", 10, 20)
        
def keyPressed():
    if player.isPlaying():
        player.pause()
    # if the player is at the end of the file,
    # we have to rewind it before telling it to
    # play again
    elif player.position() == player.length():
        player.rewind()
        player.play()
    else:
        player.play() 

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This is the output:

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