private AudioFormat getFormat() {
    float sampleRate = 44100;
    int sampleSizeInBits = 16;
    int channels = 1;          //mono
    boolean signed = true;     //Indicates whether the data is signed or unsigned
    boolean bigEndian = true;  //Indicates whether the audio data is stored in big-endian or little-endian order
    return new AudioFormat(sampleRate, sampleSizeInBits, channels, signed, bigEndian);
}

private AudioFormat getFormat() {
        float sampleRate = 44100;
        int sampleSizeInBits = 16;
        int channels = 1;          //mono
        boolean signed = true;     //Indicates whether the data is signed or unsigned
        boolean bigEndian = true;  //Indicates whether the audio data is stored in big-endian or little-endian order

        return new AudioFormat.Builder().setSampleRate(Math.round(sampleRate)).build();
    }

class   AudioFormat.Builder
        Builder class for AudioFormat objects.