This depends largely on the character and purpose of the project. A children’s tape is usually (but not always) normal bias without noise reduction. Why? Normal bias tape is cheaper to make and cheaper to sell. Besides, does your child’s Fisher Price cassette player have noise reduction?
We’ve found that tapes like BASF LHD normal bias duplicating tape gave us a very natural-sounding cassette – closer to the master than chrome tape, but chrome has more ‘sparkle’ to it; so if your master is a little dull, then chrome might be for you. Also, chrome is more forgiving. It’s harder to distort, so it handles dynamic signals better than normal bias. Chrome has proven to have a lower noise floor than normal bias, but the warmth of the normal is real nice.
Bud Bremner owns and operates Coastal Mastering in Vancouver, BC.