simplestretch package

Module contents

simplestretch.speedup_audio(audio: str | numpy.ndarray, factor: float, output: str | None = None, samplerate: int | None = None) Tuple[numpy.ndarray, int]

This function is used to change an audio’s speed by a certain factor.

Because this function doesn’t apply any resampling or similar algorithms, for very low factors (around 0.2 or lower) the audio quality might decrease noticeably.

Parameters:
  • audio (str | numpy.ndarray) –

    The audio to be sped up or down.

    You can provide either a path to a file containing your audio, or the raw sound data as a numpy ndarray.

  • factor (float) –

    This is the factor by which the speed of the audio will be changed.

    For example, a factor of 2 will make the audio twice as fast, and a factor of 0.5 will make the audio half as fast.

  • output (str, optional) –

    This is the path to which the sped up audio will be saved.

    If no argument is passed, it wont save the audio to a file.

  • samplerate (int, optional) –

    The sample rate of the original audio.

    You only need to pass this argument if you’ve provided a numpy ndarray as the audio. Otherwise, it will be determined automatically.

Returns:

A tuple containing the sped up audio data and sample rate.

This is returned whether or not the audio gets saved to a file.

Return type:

Tuple[ndarray, int]

simplestretch.stretch_audio(audio: str | numpy.ndarray, factor: float, output: str | None = None, samplerate: int | None = None) Tuple[numpy.ndarray, int]

This function is used to stretch an audio’s length by a certain factor.

Because this function doesn’t apply any resampling or similar algorithms, for very high factors (around 5 or higher) the audio quality might decrease noticeably.

Parameters:
  • audio (str | numpy.ndarray) –

    The audio to be stretched.

    You can provide either a path to a file containing your audio, or the raw sound data as a numpy ndarray.

  • factor (float) –

    This is the factor by which the length of the audio will be changed.

    For example, a factor of 2 will make the audio twice as long, and a factor of 0.5 will make the audio half as long.

  • output (str, optional) –

    This is the path to which the stretched audio will be saved.

    If no argument is passed, it wont save the audio to a file.

  • samplerate (int, optional) –

    The sample rate of the original audio.

    You only need to pass this argument if you’ve provided a numpy ndarray as the audio. Otherwise, it will be determined automatically.

Returns:

A tuple containing the stretched audio data and sample rate.

This is returned whether or not the audio gets saved to a file.

Return type:

Tuple[ndarray, int]