While most bards are known for certain signature performances and spells, you're always tweaking your available repertoire. When you make your daily preparations, you can change one of your signature spells to a different spell of that level from your repertoire.
You can perform multiple compositions simultaneously. IF your next action is to cast a composition, it becomes a harmonized composition. Unlike a normal composition, a harmonized composition doesn't end if you cast another composition, and you can cast another composition on the same turn as a Harmonized one. Casting another harmonized composition you have in effect.
You don't lose spells easily. If a reaction would disrupt your spellcasting action, attempt a DC 15 flat check. if you succeed, your action isn't interrupted.
Your broad experiences translate to a range of skills. You add your level to all skill checks in which you are untrained. You can attempt any skill check that normally requires you to be trained, even if you are untrained. If you have legendary proficiency in Occultism, you can attempt any skill check that normally requires you have expert proficiency, even if untrained or trained.
Your performances inspire even greater deeds in your allies. you learn the "Inspire Heroics" metamagic focus spell. Increase the number of Focus Points in your focus pool by 1.
When you succeed at a Knowledge check, you gain additional information or context. When you critically succeed at a Knowledge check, at the GM's discretion you might gain even more additional information or context than normal.
You can translate the emotion and power of a composition to other mediums. If your next action is to cast a composition spell, you can use a different kind of performance than usual for the composition to change any of its somatic components to verbal components or vice versa. As usual for composition spells, this changes whether the composition is auditory or visual.