In the Java Sound API, you can check if your system supports a particular audio format by using the AudioSystem.isConversionSupported and AudioSystem.getTargetEncodings methods. You can also determine if a particular AudioFormat is supported by querying the DataLine.Info object when working with audio input and output lines.

Here’s a breakdown of how you can check:

1. Using AudioSystem.isConversionSupported

The AudioSystem.isConversionSupported method checks whether the conversion between two audio formats or audio encodings is supported by the system.

Example:

package org.kodejava.sound;

import javax.sound.sampled.*;

public class AudioFormatCheck {
    public static void main(String[] args) {
        // Define the audio format you want to check
        AudioFormat format = new AudioFormat(
                AudioFormat.Encoding.PCM_SIGNED, // Encoding
                44100.0f,                       // Sample Rate
                16,                             // Sample Size in Bits
                2,                              // Channels
                4,                              // Frame Size
                44100.0f,                       // Frame Rate
                false                           // Big Endian
        );

        // Check if the system supports this format
        if (AudioSystem.isConversionSupported(AudioFormat.Encoding.PCM_SIGNED, format)) {
            System.out.println("The audio format is supported!");
        } else {
            System.out.println("The audio format is not supported!");
        }
    }
}

2. Using DataLine.Info

DataLine.Info allows you to check if specific audio data lines support the desired audio format.

Example:

package org.kodejava.sound;

import javax.sound.sampled.*;

public class AudioLineSupportCheck {
    public static void main(String[] args) {
        // Define the audio format you want to check
        AudioFormat format = new AudioFormat(
                AudioFormat.Encoding.PCM_SIGNED, // Encoding
                44100.0f,                       // Sample Rate
                16,                             // Sample Size in Bits
                2,                              // Channels
                4,                              // Frame Size
                44100.0f,                       // Frame Rate
                false                           // Big Endian
        );

        // Create a DataLine.Info object with the desired format
        DataLine.Info info = new DataLine.Info(SourceDataLine.class, format);

        // Check if the DataLine with the specified info is supported
        if (AudioSystem.isLineSupported(info)) {
            System.out.println("The audio line supports the specified format!");
        } else {
            System.out.println("The audio line does not support the specified format!");
        }
    }
}

3. Getting Supported Encodings and Conversions

You can also retrieve the supported audio encodings and conversions using AudioSystem methods like AudioSystem.getTargetEncodings or AudioSystem.getAudioInputStream.

Example of supported encodings:

package org.kodejava.sound;

import javax.sound.sampled.*;

public class SupportedEncodings {
    public static void main(String[] args) {
        // Define an audio format
        AudioFormat format = new AudioFormat(44100.0f, 16, 2, true, false);

        // Get the target encodings for this format
        AudioFormat.Encoding[] encodings = AudioSystem.getTargetEncodings(format);

        System.out.println("Supported target encodings:");
        for (AudioFormat.Encoding encoding : encodings) {
            System.out.println("- " + encoding);
        }
    }
}

Output:

Supported target encodings:
- ULAW
- PCM_UNSIGNED
- PCM_SIGNED
- PCM_SIGNED
- PCM_UNSIGNED
- PCM_FLOAT
- ALAW

Summary

• Use AudioSystem.isConversionSupported() to check if a certain format/encoding conversion is supported.
• Use AudioSystem.isLineSupported() to check if a specific audio format is supported on a DataLine like a SourceDataLine or a TargetDataLine.
• Use AudioSystem.getTargetEncodings() to retrieve possible target encodings for a specific AudioFormat.

These methods let you determine if your system can handle the desired audio format or perform conversions between formats.