public void dequeueSound(String filename) {
		if (filename == null || filename.equals("")) {
			errorMessage("Filename not specified in method 'dequeueSound'");
			return;
		}

		synchronized (sequenceQueueLock) {
			if (sequenceQueue != null) {
				ListIterator<FilenameURL> i = sequenceQueue.listIterator();
				while (i.hasNext()) {
					if (i.next().getFilename().equals(filename)) {
						i.remove();
						break;
					}
				}
			}
		}
	}