Table Of Contents

• Audio Output
  • Event dispatching and state changes
  • Sound
    • Sound.get_pos()
    • Sound.length
    • Sound.load()
    • Sound.loop
    • Sound.pitch
    • Sound.play()
    • Sound.seek()
    • Sound.source
    • Sound.state
    • Sound.stop()
    • Sound.unload()
    • Sound.volume
  • SoundLoader
    • SoundLoader.load()
    • SoundLoader.register()

Audio Output

Load an audio sound and play it with:

from kivy.core.audio_output import SoundLoader

sound = SoundLoader.load('mytest.wav')
if sound:
    print("Sound found at %s" % sound.source)
    print("Sound is %.3f seconds" % sound.length)
    sound.play()

You should not use the Sound class directly. The class returned by SoundLoader.load() will be the best sound provider for that particular file type, so it might return different Sound classes depending the file type.

Event dispatching and state changes

Audio is often processed in parallel to your code. This means you often need to enter the Kivy eventloop in order to allow events and state changes to be dispatched correctly.

You seldom need to worry about this as Kivy apps typically always require this event loop for the GUI to remain responsive, but it is good to keep this in mind when debugging or running in a REPL (Read-eval-print loop).

Changed in version 1.10.0: The pygst and gi providers have been removed.

Changed in version 1.8.0: There are now 2 distinct Gstreamer implementations: one using Gi/Gst working for both Python 2+3 with Gstreamer 1.0, and one using PyGST working only for Python 2 + Gstreamer 0.10.

Note

The core audio library does not support recording audio. If you require this functionality, please refer to the audiostream extension.

class kivy.core.audio_output.Sound

Bases: kivy.event.EventDispatcher

Represents a sound to play. This class is abstract, and cannot be used directly.

Use SoundLoader to load a sound.

Events:

on_play: None

Fired when the sound is played.

on_stop: None

Fired when the sound is stopped.

get_pos()

Returns the current position of the audio file. Returns 0 if not playing.

New in version 1.4.1.

property length

Get length of the sound (in seconds).

load()

Load the file into memory.

loop

Set to True if the sound should automatically loop when it finishes.

New in version 1.8.0.

loop is a BooleanProperty and defaults to False.

pitch

Pitch of a sound. 2 is an octave higher, .5 one below. This is only implemented for SDL2 audio provider yet.

New in version 1.10.0.

pitch is a NumericProperty and defaults to 1.

play()

Play the file.

seek(position)

Go to the <position> (in seconds).

Note

Most sound providers cannot seek when the audio is stopped. Play then seek.

source

Filename / source of your audio file.

New in version 1.3.0.

source is a StringProperty that defaults to None and is read-only. Use the SoundLoader.load() for loading audio.

state

State of the sound, one of ‘stop’ or ‘play’.

New in version 1.3.0.

state is a read-only OptionProperty.

stop()

Stop playback.

unload()

Unload the file from memory.

volume

Volume, in the range 0-1. 1 means full volume, 0 means mute.

New in version 1.3.0.

volume is a NumericProperty and defaults to 1.

class kivy.core.audio_output.SoundLoader

Bases: builtins.object

Load a sound, using the best loader for the given file type.

static load(filename)

Load a sound, and return a Sound() instance.

static register(classobj)

Register a new class to load the sound.

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