在学生会大会上，选择合适的背景音乐可以增强会议的气氛和正式感。以下是一些建议：

开始前

"Fanfare for the Common Man" by Aaron Copland

"Hallelujah" by Leonard Cohen

"Symphony No. 5" by Beethoven

唱票时

"Ain't No Mountain High Enough" by Marvin Gaye and Tammi Terrell

"I'm Still Standing" by Elton John

"Can't Stop the Feeling!" by Justin Timberlake

结束时

"Kiss the Rain" by Yiruma

"The Rose" by Bette Midler

"Time" by Joy Williams

"Just Stand Up to Cancer" by various artists

"Close to You" by Keiko Matsuda

颁奖时

"Stand By Me" by Ben E. King

"Time" by The Carpenters

"A Melody Tree" by The Daydream

"The Truth That You Leave" by Masazumi Ozawa

整体氛围

"Dreamtale" by The Daydream

"Era" by Enya

"卡农"（Canon）

"天空之城"（My Heart Will Go On）

这些建议涵盖了从严肃正式到轻松欢快的不同风格，可以根据具体会议内容和氛围进行选择。希望这些建议能帮助你找到合适的背景音乐，使学生会大会更加顺利和难忘。