I graduated from CMU in 92 with the same major as you. After graduation, I studied for a summer at the Recording Institute of Detroit, which is in Eastpoint. I wish I could say I can recommend it...but I cant for various reasons. In other words, I was very disappointed with Recording Institute of Detroit...it turned out to be a big rip off. Other than the Recording Institute of Detroit, I have not heard of any recording schools in Mich., especially not in the Mid Mich area.
In 95, I moved to Nashville to attend Middle Tennessee State University, enrolled in the RIM (Recording Industry Management and Technology) program, for a couple of years...it was a great experience! MTSU has an outstanding program, with knowledgable instructors, top notch gear, you get a lot of hands-on time working in the studios + in state Tenn. tuition was very reasonable. If you have the ability to move, you should check out MTSU.