After maintaining the Masterpiece do all enemies still within range need to make a new save each round to avoid taking bleed damage(which doesn't actually behave like bleed damage based on the effect description)?
Your driving notes cause unnatural heart rates in your opponents.
Prerequisite: Perform (percussion) 7 ranks or Perform (wind) 7 ranks.
Cost: Feat or 3rd-level bard spell known.
Effect: You create a musical tempo that first mirrors your enemies’ heartbeats, and then quickens them to dangerous levels. When you complete the performance, all enemies within 30 feet who can hear your performance must save or take 1d6 points of damage as their pounding heart causes them to sweat blood. Creatures that are immune to critical hits are unaffected by this ability.
Each round that you continue the performance adds another round to the bleed effect. Abilities that extend the duration of a bardic performance (such as Lingering Performance) affect this masterpiece.
Use: 1 bardic performance round per round of bleed.
Action: 1 standard action.