Skjálfti  Páll Ragnar Pálsson and Eðvarð Egilsson Sono Luminus SLE-70031   Today, where the list of practitioners frequently overlap, how does film music translate to concert music adaptation? On the Sono Luminus release Skjálfti (translated: Quake), the Icelandic composers Páll Ragnar Pálsson and Eðvarð Egilsson present a compelling album length suite that is more ambitious than the clip show often heard on soundtrack recordings.    The cello concerto Quake is Pálsson’s best known piece, but Skjálfti doesn’t feature music from it. Instead, it is from Tinna Hrafnsdóttir’s film of the same name, for which Pálsson and Egilsson composed the soundtrack.