Complex sentence: Typically ancient Egyptian music is composed from the phrygian dominant scale, phrygian scale, Double harmonic scale (Arabic scale) or lydian scale, often with an altered note such as a flat 5th etc to create tension.
Split into simpler sentences: Typically ancient Egyptian music is composed from the phrygian dominant scale, phrygian scale, Double harmonic scale (Arabic scale) or lydian scale. The phrygian dominant scale may often feature an altered note such as a flat 5th in parts to create tension.