• audio-length-equalizer
  • Description
    • How the length equalizer works?
  • Usage
    • Install required packages
    • Arguments
    • Run the script

In order to facilitate the audio manipulation process, with the aim to control the size of the audio and standardize datasets, a script was created to deal with this: audio-length-equalizer.py.

It's a very simple script that has very specific objectives, including:

• Recreating audio with a specific length;
• Keeping the current characteristics of the audio, without changing its bitrate, for example;
• Recreating audio with a customizable and incremental filename;
• Possibility of recreating files with another extension, for example, original audio: mp3 converted to wav;

The process of normalizing the size of the final audios is simplistic, based on the following premises:

• If audio_duration < wanted_audio_length then:
  • Added Confort Noise silence, until audio_duration=wanted_audio_length
• Otherwise:
  • Excess part of the audio is deleted, so that audio_duration=wanted_audio_length

Below are the main points to consider regarding the use of the script.

To use the script you need to install the necessary dependencies, in this case just the lib: pydub. All you need to do is run the following:

pip install -r requirements.txt

<source_folder>: Directory containing the original audio files.
<destination_folder>: Directory where the processed files will be saved.
<number_of_files>: Number of audio files to process.
<target_length_seconds>: Desired duration of each audio file in seconds.
--filename <base_filename>: (Optional) Base name for output files, defaults to "audio".
--input_extension <input_ext>: (Optional) File extension of input files, defaults to "mp3".
--output_extension <output_ext>: (Optional) File extension for output files, defaults to "mp3".

python audio-length-equalizer.py <ORIGINAL_AUDIOS_FOLDER> <TARGET_AUDIOS_FOLDER> 5 300 --filename my_audio --input_extension mp3 --output_extension wav

This will create 5 audios with 5 minutes each and incremental filenames, starting with my_audio_1.wav until my_audio_5.wav.