!7

import javax.sound.sampled.*;

static /*Target*/DataLine currentLine;

p-substance {
  final L<AudioLine> lines = allTargetDataLines();
  L<S> lineNames = allToString(lines);
  ButtonGroup buttons = showUnselectedRadioButtons("Input Audio Lines", lineNames);
  JFrame frame = minFrameWidth(300, packFrame(buttons));
  final JLabel lblLevel = jcenteredBoldLabel("Level: ");
  addToWindowAndPack(frame, lblLevel);
  awtEvery(lblLevel, 100, r {
    S text = "Level: ";
    if (currentLine != null) try {
      text += currentLine.getLevel();
    } catch e {
      text += str(e);
      printStackTrace(e);
    }
    lblLevel.setText(text);
  });
  onRadioButtonChange(buttons, voidfunc(int i) {
    if (i < 0) ret;
    AudioLine line = lines.get(i);
    currentLine = (DataLine) line.open();
    thread {
      print("Capturing");
      captureAudioFromLine(currentLine, sphinxAudioFormat());
      print("Capture done");
    }
  });
}

Began life as a copy of #1007023