Here are the current filing fees for most items involving songs:

Registration of a claim in an original work of authorship

Electronic filing:
Single author, same claimant, one work, not for hire $45

Standard Application $65

Paper Filing (Forms PA, SR, TX, VA, SE) $125

Registration of a claim in a group of unpublished works $85 (up to 10)

Registration of a claim in a group of published photographs or a claim in a group of unpublished photographs $55

Registration of a claim in a group of works published on an album of music $65 (up to 20 includes photographs on an an album)

Here's the rest:

U.S. Copyright Office Filing Fees

BIAB 2024 Audiophile, 24Core/60CoreGPU Core M2 MacStudioUltra/8TB/192GB Sonoma, M1 MBAir, 2012 MBP
Digital Performer11, LogicPro
Finale27/Dorico/Encore/SmartScorePro64/Notion/Overture