DOM-ScorchedEarth is one of 3 maps (the others are ONS-Tricky and CTF-Geothermal) with typographical errors in their audio properties that cause them to look for songs that don't exist. In ScorchedEarth's case this is because the mapper typed 'KR-ChemicalBurn ' (note the extra space) into the map's audio properties, instead of the correct 'KR-Chemical-Burn'. Simply name an ogg music file KR-ChemicalBurn .ogg (again, note the extra space) and place it in your UT2004 music folder if you would like music for the map.