The 28k and 33k modem broadcasts are there as a courtesy to those that may not have a 56k modem. The regular broadcasts, including all live and pre-recorded shows are on the 56k modem. We suggest you upgrade to a 56k or T1/DSL/Cable modem to experience the full benifits of Tha UnderGround RailRoad. Additionally the T1/DSL/Cable is also put up as a courtesy to those that have it because it has a much cleaner sound to it. For T1/DSL/Cable users we suggest that you check the broadcast schedule (when available) for live and other special broadcasts that will ONLY be aired at the 56k modem speed.