You are still early in this process and doing the right thing. As a Sophomore, in my opinion, you should simply be learning and exploring degrees and possibilities. I would not suggest making any firm decision yet.
Maybe try on a double degree for a month. Look at schools that offer these programs (given above). Explore their scholarships etc. What do their curriculums look like (available on most school websites)? Does the school seem to promote study in other areas or not? Make a spreadsheet or list about each school.
Maybe try on the double major for awhile. See which schools may offer that and who gives scholarships. Go through the same questions above.
Maybe look into schools that offer a hybrid degree (some mentionned above - CMU). Do the same process.
Talk with your music teacher(s), other music students, your parents etc. At some point (next year), you may be able to talk with students at schools doing similar degress to find out the pros and cons. Just gather lots of info…and, you’ll probably start to drift in a certain direction.
This thread is a great first step for you. I would just wait a bit on any firm decision now.