Public void startAudioCapture()

{

    val config = AudioPlaybackCaptureConfiguration.Builder(mediaProjection!!)

            .addMatchingUsage(AudioAttributes.USAGE_MEDIA) // TODO provide UI options for inclusion/exclusion

            .build()


        /**

         * Using hardcoded values for the audio format, Mono PCM samples with a sample rate of 8000Hz

         * These can be changed according to your application's needs

         */

        val audioFormat = AudioFormat.Builder()

            .setEncoding(AudioFormat.ENCODING_PCM_FLOAT)

            .setSampleRate(8000)

            .setChannelMask(AudioFormat.CHANNEL_IN_MONO)

            .build()


        audioRecord = AudioRecord.Builder()

            .setAudioFormat(audioFormat)

            // For optimal performance, the buffer size

            // can be optionally specified to store audio samples.

            // If the value is not specified,

            // uses a single frame and lets the

            // native code figure out the minimum buffer size.

            .setBufferSizeInBytes(BUFFER_SIZE_IN_BYTES)

            .setAudioPlaybackCaptureConfig(config)

            .build()


        audioRecord!!.startRecording()

        audioCaptureThread = thread(start = true) {

            val outputFile = createAudioFile()

            Log.d(LOG_TAG, "Created file for capture target: ${outputFile.absolutePath}")

            writeAudioToFile(outputFile)

        }

}