Tape restoration?

Sep 16, 2004
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www.whereshewept.com
Anyone have experience with tape resoration? I got an old death metal demo of some local legends to transfer to CD but the B-side is a liitle funky, as close as i can describe it would be the pumping effect you get when you slam a compressopr on the main buss.
 
I had to do this aswell a week ago. I think it's good to try different Cassette players, because the sound head has slightly different angels on every tape deck. And some settings will sound better.
Also in my tapedeck it sounds different if I press play in < this direction or in that >