UC App, how would changing senior classes affect me?

<p>First of all, my school runs on a 4x4 block schedule, which means every half a year I get 4 classes and the second half I get 4 new classes.</p>

<p>As of right now, I am freely able to go to my counselor and change the classes I take next half year. I am considering this, because there is a class that I want to change next term, but I haven't decided yet.</p>

<p>Here's my question: My term ends on December 21. UC apps are due November 30. If from December 1-December 21 I decided to in fact change the class, should I report to the UC about this change?</p>

<p>Also this change is from my Physics AP course into Peer Tutoring for the Beginning Choir. So obviously, this is a step down academically. How much would you say this would affect my admission chances? </p>

<p>Things to consider:
*I stated in my personal statement and extracurriculars that I am musically involved.
*If I took out my Physics AP, I would have 3/4 of my classes as AP classes, down from 4/4.</p>

<p>Thank you!</p>