[Audioarchivist]

It's my experience that for playback a type II chrome or type IV metal tape might sound better if played back at the normal type I position. Just listen as you switch back and forth - it'll be brighter in the highs at the norm position. If the deck does have auto tape type sensors it looks for those other holes beside the tape record tab like previously mentioned, you could cover the holes with a chunk of scotch tape or something to block them...

While it might be more accurate to set the bias "correctly" according to what type of tape you're using, in this digital age that extra couple dB in the high range helps. Tape noise be damned!

Good luck and remember: for best results always adjust tape head azimuth (re-align heads manually to match the tape you want played)... This is the most important part of proper tape transfer, bar none! Look it up!