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How to read and write audio files in Kotlin

How to read and write audio files in Kotlin.

How to Read and Write Audio Files in Kotlin

In this tutorial, we will learn how to read and write audio files in Kotlin. We will explore different methods and libraries available in Kotlin to manipulate audio files.

Reading Audio Files​

To read audio files in Kotlin, we can make use of the javax.sound.sampled package, which provides classes and interfaces for recording, playing, and manipulating audio samples.

Here is a step-by-step guide to reading audio files in Kotlin:

  1. Import the necessary packages:

    import javax.sound.sampled.AudioInputStream
    import javax.sound.sampled.AudioSystem
    import java.io.File

  2. Load the audio file using the AudioInputStream class:

    val audioFile = File("path/to/audio/file.wav")
    val audioInputStream = AudioSystem.getAudioInputStream(audioFile)

    Make sure to replace "path/to/audio/file.wav" with the actual path to your audio file.

  3. Get the audio format from the AudioInputStream:

    val audioFormat = audioInputStream.format

  4. Read the audio data from the AudioInputStream:

    val buffer = ByteArray(audioInputStream.available())
    audioInputStream.read(buffer)

    The audio data is now stored in the buffer variable as bytes.

Writing Audio Files​

To write audio files in Kotlin, we can use the javax.sound.sampled package as well. Here is a step-by-step guide to writing audio files in Kotlin:

  1. Import the necessary packages:

    import javax.sound.sampled.AudioFileFormat
    import javax.sound.sampled.AudioFormat
    import javax.sound.sampled.AudioSystem
    import java.io.File

  2. Create an AudioFormat object with the desired audio specifications:

    val audioFormat = AudioFormat(sampleRate, sampleSizeInBits, channels, signed, bigEndian)

    Replace the variables sampleRate, sampleSizeInBits, channels, signed, and bigEndian with your desired values.

  3. Create an AudioInputStream from the audio data:

    val audioInputStream = AudioInputStream(inputStream, audioFormat, audioDataSize)

    Replace inputStream with the input audio data stream, and audioDataSize with the size of the audio data in bytes.

  4. Save the audio data to a file using the AudioSystem class:

    val outputFile = File("path/to/output/file.wav")
    AudioSystem.write(audioInputStream, AudioFileFormat.Type.WAVE, outputFile)

    Replace "path/to/output/file.wav" with the desired path for the output audio file.

Conclusion​

In this tutorial, we learned how to read and write audio files in Kotlin. We explored the javax.sound.sampled package and its classes and interfaces for manipulating audio samples. By following the step-by-step guides, you can easily read and write audio files in your Kotlin projects.