Here, the area you cannot skip is the Capitol. Capitol is the seat of the House of Representatives and the Senate. The huge dome, on the basis of the dome of St. Peter's in Rome, stands apart especially different Washington buildings.
Dynamic range compression (DRC) or simply compression is a signal processing operation that reduces the volume of loud sounds or amplifies quiet sounds by narrowing or compressing an audio signal's dynamic range.
Put simply, a compressor reduces dynamic range. The dynamic range is the range from the quietest point to the loudest point in a given piece of audio. So, if that was, say, a guitar performance, that would most likely be from silence up to the loudest bit of the performance.