public static Sample sample(String fn) {
		Sample sample = samples.get(fn);
		if (sample == null) {
			try {
				sample = new Sample(fn);
				samples.put(fn, sample);
			} catch (UnsupportedAudioFileException e) {
				// TODO Auto-generated catch block
				 //e.printStackTrace();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				 //e.printStackTrace();
			}
		}
		return sample;
	}