[zeek]

The "Type" selector isn't going to ruin your tape, it just won't sound as good (IMO).

The different tape type selections are set for different bias and equalization for each specific tape type to make it sound better based on the specific properties of each tapes material makeup. .

There are many many variables there that could cause your problems. I would really suggest having your deck gone over by someone and brought back to spec before transferring the tapes. it gets pricey, but if you have a lot to do, and they are valuable to you, it's well worth it.

I use Willy Herman in california for my repairs and calibrations. Good guy, great work, and much cheaper the ESL Labratories ect.