static Pair<TargetDataLine, SourceDataLine> javaSound_recordLine(AudioFormat format, int internalBufferSize) ctex {
  DataLine.Info	sourceInfo = new DataLine.Info(SourceDataLine.class, format, internalBufferSize);
  SourceDataLine out = (SourceDataLine) AudioSystem.getLine(sourceInfo);
  out.open(format, internalBufferSize);
  ret out;
}