Maybe this blog post written by a waitlisted Oberlin student will give your daughter hope!
https://www.oberlin.edu/blogs/all-roads-lead-oberlin-eventually
Your daughter’s stats seem within range for acceptance. I think she has a chance in the RD round, so I wouldn’t give up just yet. She might consider one more try at standardized testing if there is a date coming up (has she tried the ACT? My D did better on that than the SAT) If she gets a better score, she could have her file updated and that might nudge the needle a bit.
Other LACs that are strong in music are Lawrence (Appleton, WI) and St. Olaf (Northfield, MI). My daughter, who is at Oberlin, also applied to St. Olaf and it is a special place, albeit with a less “quirky” reputation than Oberlin. Dickinson and College of Wooster are also possibilities. If the deadlines, haven’t passed, she might want to consider some of these.