There are time limits. Your attorney may have waited too long to request the tape.
Where in Michigan? Some counties in Michigan will crucify you for DUI, others don't care so much.
Thing is, if this is your 2nd offense, and your first was within 7 years, your license will be REVOKED. Not suspended. . . but REVOKED. You'll then have to go before someone to get your license back, and they may reward it back, but you'll be forced to have a PBT ignition interlock device in your car to get it to go. Then you'll have to apply and have yet another hearing the following year.
And most likely, you'll only be able to drive to AA meetings and work.
So, if you can, fight as hard as possible to get it down to at least Reckless Driving. Impaired will still carry the penalties.
Oh yes, and you'll also have a $2000 bad driver penalty, payable in 2 $1000 increments. . .