godot-docs/classes/class_audioeffectpitchshift.rst

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.. _class_AudioEffectPitchShift:

AudioEffectPitchShift
=====================

**Inherits:** :ref:`AudioEffect<class_AudioEffect>` **<** :ref:`Resource<class_Resource>` **<** :ref:`Reference<class_Reference>` **<** :ref:`Object<class_Object>`

Adds a pitch-shifting audio effect to an Audio bus.

Raises or lowers the pitch of original sound.

.. rst-class:: classref-introduction-group

Description
-----------

Allows modulation of pitch independently of tempo. All frequencies can be increased/decreased with minimal effect on transients.

.. rst-class:: classref-reftable-group

Properties
----------

.. table::
   :widths: auto

   +------------------------------------------------------+------------------------------------------------------------------------+---------+
   | :ref:`FFT_Size<enum_AudioEffectPitchShift_FFT_Size>` | :ref:`fft_size<class_AudioEffectPitchShift_property_fft_size>`         | ``3``   |
   +------------------------------------------------------+------------------------------------------------------------------------+---------+
   | :ref:`int<class_int>`                                | :ref:`oversampling<class_AudioEffectPitchShift_property_oversampling>` | ``4``   |
   +------------------------------------------------------+------------------------------------------------------------------------+---------+
   | :ref:`float<class_float>`                            | :ref:`pitch_scale<class_AudioEffectPitchShift_property_pitch_scale>`   | ``1.0`` |
   +------------------------------------------------------+------------------------------------------------------------------------+---------+

.. rst-class:: classref-section-separator

----

.. rst-class:: classref-descriptions-group

Enumerations
------------

.. _enum_AudioEffectPitchShift_FFT_Size:

.. rst-class:: classref-enumeration

enum **FFT_Size**:

.. _class_AudioEffectPitchShift_constant_FFT_SIZE_256:

.. rst-class:: classref-enumeration-constant

:ref:`FFT_Size<enum_AudioEffectPitchShift_FFT_Size>` **FFT_SIZE_256** = ``0``

Use a buffer of 256 samples for the Fast Fourier transform. Lowest latency, but least stable over time.

.. _class_AudioEffectPitchShift_constant_FFT_SIZE_512:

.. rst-class:: classref-enumeration-constant

:ref:`FFT_Size<enum_AudioEffectPitchShift_FFT_Size>` **FFT_SIZE_512** = ``1``

Use a buffer of 512 samples for the Fast Fourier transform. Low latency, but less stable over time.

.. _class_AudioEffectPitchShift_constant_FFT_SIZE_1024:

.. rst-class:: classref-enumeration-constant

:ref:`FFT_Size<enum_AudioEffectPitchShift_FFT_Size>` **FFT_SIZE_1024** = ``2``

Use a buffer of 1024 samples for the Fast Fourier transform. This is a compromise between latency and stability over time.

.. _class_AudioEffectPitchShift_constant_FFT_SIZE_2048:

.. rst-class:: classref-enumeration-constant

:ref:`FFT_Size<enum_AudioEffectPitchShift_FFT_Size>` **FFT_SIZE_2048** = ``3``

Use a buffer of 2048 samples for the Fast Fourier transform. High latency, but stable over time.

.. _class_AudioEffectPitchShift_constant_FFT_SIZE_4096:

.. rst-class:: classref-enumeration-constant

:ref:`FFT_Size<enum_AudioEffectPitchShift_FFT_Size>` **FFT_SIZE_4096** = ``4``

Use a buffer of 4096 samples for the Fast Fourier transform. Highest latency, but most stable over time.

.. _class_AudioEffectPitchShift_constant_FFT_SIZE_MAX:

.. rst-class:: classref-enumeration-constant

:ref:`FFT_Size<enum_AudioEffectPitchShift_FFT_Size>` **FFT_SIZE_MAX** = ``5``

Represents the size of the :ref:`FFT_Size<enum_AudioEffectPitchShift_FFT_Size>` enum.

.. rst-class:: classref-section-separator

----

.. rst-class:: classref-descriptions-group

Property Descriptions
---------------------

.. _class_AudioEffectPitchShift_property_fft_size:

.. rst-class:: classref-property

:ref:`FFT_Size<enum_AudioEffectPitchShift_FFT_Size>` **fft_size** = ``3``

.. rst-class:: classref-property-setget

- void **set_fft_size** **(** :ref:`FFT_Size<enum_AudioEffectPitchShift_FFT_Size>` value **)**
- :ref:`FFT_Size<enum_AudioEffectPitchShift_FFT_Size>` **get_fft_size** **(** **)**

The size of the `Fast Fourier transform <https://en.wikipedia.org/wiki/Fast_Fourier_transform>`__ buffer. Higher values smooth out the effect over time, but have greater latency. The effects of this higher latency are especially noticeable on sounds that have sudden amplitude changes.

.. rst-class:: classref-item-separator

----

.. _class_AudioEffectPitchShift_property_oversampling:

.. rst-class:: classref-property

:ref:`int<class_int>` **oversampling** = ``4``

.. rst-class:: classref-property-setget

- void **set_oversampling** **(** :ref:`int<class_int>` value **)**
- :ref:`int<class_int>` **get_oversampling** **(** **)**

The oversampling factor to use. Higher values result in better quality, but are more demanding on the CPU and may cause audio cracking if the CPU can't keep up.

.. rst-class:: classref-item-separator

----

.. _class_AudioEffectPitchShift_property_pitch_scale:

.. rst-class:: classref-property

:ref:`float<class_float>` **pitch_scale** = ``1.0``

.. rst-class:: classref-property-setget

- void **set_pitch_scale** **(** :ref:`float<class_float>` value **)**
- :ref:`float<class_float>` **get_pitch_scale** **(** **)**

The pitch scale to use. ``1.0`` is the default pitch and plays sounds unaltered. :ref:`pitch_scale<class_AudioEffectPitchShift_property_pitch_scale>` can range from ``0.0`` (infinitely low pitch, inaudible) to ``16`` (16 times higher than the initial pitch).

.. |virtual| replace:: :abbr:`virtual (This method should typically be overridden by the user to have any effect.)`
.. |const| replace:: :abbr:`const (This method has no side effects. It doesn't modify any of the instance's member variables.)`
.. |vararg| replace:: :abbr:`vararg (This method accepts any number of arguments after the ones described here.)`
.. |static| replace:: :abbr:`static (This method doesn't need an instance to be called, so it can be called directly using the class name.)`