Base Class: Wizard
the school of audiomancy is a school that manipulates their magic with sound, and can a do a bunch of different things. this subclass while somewhat similar to the bard isnt one. this subclass focuses on Damage, and has utility and support as a secondary option
Audiomancy Savant
Beginning when you select this school at 2nd level, anytime you would cast a spell that deals damage you can choose to alter its damage type to thunder, also when you use this feature on any spell except a cantrip you can add one extra damage dice equal to half the original dice rounding down (d8 is extra d4, d10 is d4, d12 is d6, d6 is none, d4 is none).
You also gain proficiency with all instruments, and expertise with 1 instrument of choice.
Musical Spells
beginning at 2nd level, you gain the ability to use some of your abilities using spell slots rather than just spells.
Performance
Starting at 6th level, you can spend 1 minute performing to give your allies temp hit points equal to their level/CR. also they gain a d6 they can add to any one attack roll or ability check. you also gain expertise in the performance skill
Musical Expertise
Beginning at 10th level, creatures have disadvantage on saves against being charmed or feared by you, this bypasses magical resistance.
Melody
Starting at 14th level, your spells that charm or fear bypass immunity. for instance if a creature is immune to charmed, it no longer is for you.