Complex sentence: Some "Unforgettable Fire" numbers were not even attempted, although "4th of July" was played over the PA as an introduction and cue for the band, while some that were attempted were not as dense and precise as on record.
Split into simpler sentences: Some "Unforgettable Fire" numbers were not even attempted; although "4th of July" was played over the PA as an introduction and cue for the band. While some that were, were not as dense and precise as on record.