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Phonon.AbstractMediaStream

Phonon.VolumeFaderEffect

Synopsis

Functions

Slots

Detailed Description

This effect differs from gradually changing the output volume in that a dedicated effect can change the volume in the smallest possible steps while every other volume control will make more or less noticeable steps.

See also

AudioOutput.volume()

class PySide.phonon.Phonon.VolumeFaderEffect([parent=None])
Parameters:parent – PySide.QtCore.QObject
PySide.phonon.Phonon.VolumeFaderEffect.FadeCurve

Determines the curve of the volume change.

Constant Description
Phonon.VolumeFaderEffect.Fade3Decibel Crossfade curve/fast fade out. This is the default fade curve.
Phonon.VolumeFaderEffect.Fade6Decibel Linear fade out.
Phonon.VolumeFaderEffect.Fade9Decibel Slow fade out.
Phonon.VolumeFaderEffect.Fade12Decibel A more extreme version of the -9dB fade.

Notes:

Fade3Decibel is often the best fade for a crossfade, as after half of the time the volume reached -3dB. This means that half the possible power (which is proportional to the square of the voltage) is reached. Summed, the maximum power of two audio signals fading with a -3dB curve will always be equal.

For fading in or out the -3dB curve is too abrupt in the end.

With a -6dB fade curve, a volume of -6dB is reached after half of the fading time. -6dB is equal to half of the voltage meaning that the voltage multiplier changes linearly from the start of the fade to the end.

With the Fade9Decibel fade, a volume of -9dB is reached after half of the fade time, so the fade is fast in the beginning and slow at the end. This is a good fade for ending music.

PySide.phonon.Phonon.VolumeFaderEffect.fadeCurve()
Return type:PySide.phonon.Phonon::VolumeFaderEffect.FadeCurve

This property holds the fade curve to be used for the PySide.phonon.Phonon::VolumeFaderEffect.fadeIn() , PySide.phonon.Phonon::VolumeFaderEffect.fadeOut() and PySide.phonon.Phonon::VolumeFaderEffect.fadeTo() slots.

Defaults to Fade3Decibel .

See also

Phonon.VolumeFaderEffect.FadeCurve

PySide.phonon.Phonon.VolumeFaderEffect.fadeIn(fadeTime)
Parameters:fadeTime – PySide.QtCore.int

Tells the Fader to change the volume from the current volume to 100% in fadeTime milliseconds.

Short for fadeTo(1.0, fadeTime) .

fadeTime the fade duration in milliseconds

See also

PySide.phonon.Phonon::VolumeFaderEffect.fadeTo() PySide.phonon.Phonon::VolumeFaderEffect.volume()

PySide.phonon.Phonon.VolumeFaderEffect.fadeOut(fadeTime)
Parameters:fadeTime – PySide.QtCore.int

Tells the Fader to change the volume from the current volume to 0% in fadeTime milliseconds. Short for fadeTo(0.0, fadeTime) .

fadeTime the fade duration in milliseconds

PySide.phonon.Phonon.VolumeFaderEffect.fadeTo(volume, fadeTime)
Parameters:
  • volume – PySide.QtCore.float
  • fadeTime – PySide.QtCore.int

Tells the Fader to change the volume from the current value to volume in fadeTime milliseconds.

See also

PySide.phonon.Phonon::VolumeFaderEffect.fadeIn() PySide.phonon.Phonon::VolumeFaderEffect.fadeOut()

PySide.phonon.Phonon.VolumeFaderEffect.setFadeCurve(curve)
Parameters:curve – PySide.phonon.Phonon::VolumeFaderEffect.FadeCurve

This property holds the fade curve to be used for the PySide.phonon.Phonon::VolumeFaderEffect.fadeIn() , PySide.phonon.Phonon::VolumeFaderEffect.fadeOut() and PySide.phonon.Phonon::VolumeFaderEffect.fadeTo() slots.

Defaults to Fade3Decibel .

See also

Phonon.VolumeFaderEffect.FadeCurve

PySide.phonon.Phonon.VolumeFaderEffect.setVolume(volume)
Parameters:volume – PySide.QtCore.float

This is the current volume of the output as voltage factor. Setting this property changes the volume immediately.

1.0 means 100%, 0.5 means 50% voltage/25% power, 0.0 means 0%

See also

PySide.phonon.Phonon::VolumeFaderEffect.volumeDecibel()

PySide.phonon.Phonon.VolumeFaderEffect.setVolumeDecibel(volumeDecibel)
Parameters:volumeDecibel – PySide.QtCore.double

This is the current volume of the output in decibel. Setting this property changes the volume immediately.

0 dB means no change in volume, -6dB means an attenuation of the voltage to 50% and an attenuation of the power to 25%, -inf dB means silence.

See also

PySide.phonon.Phonon::VolumeFaderEffect.volume()

PySide.phonon.Phonon.VolumeFaderEffect.volume()
Return type:PySide.QtCore.float

This is the current volume of the output as voltage factor. Setting this property changes the volume immediately.

1.0 means 100%, 0.5 means 50% voltage/25% power, 0.0 means 0%

See also

PySide.phonon.Phonon::VolumeFaderEffect.volumeDecibel()

PySide.phonon.Phonon.VolumeFaderEffect.volumeDecibel()
Return type:PySide.QtCore.double

This is the current volume of the output in decibel. Setting this property changes the volume immediately.

0 dB means no change in volume, -6dB means an attenuation of the voltage to 50% and an attenuation of the power to 25%, -inf dB means silence.

See also

PySide.phonon.Phonon::VolumeFaderEffect.volume()

Indt Openbossa Qt Python