Simply producing a "transformative work" that is not identical to the previous work does not insulate you from a copyright infringement claim. For one famous example, we could look to Bright Tunes Music Corp. v. Harrisongs Music, Ltd., 420 F.Supp 177 (S.D.N.Y. Sept. 1, 1976). In that case, it was claimed that George Harrison's song My Sweet Lord used two short musical motifs from the Chiffons' He's So Fine. Anyone listening to the songs can hear that they are not 1 for 1 reproductions of one another. But the court found that the two motifs incorporated into Harrison's chorus represented copyright infringement.
There is a level of copying that courts will sometimes find de minimus, but that standard is difficult to quantify, and in any case, no court would find that anything that wasn't a 1 to 1 representation would meet the de minimusstandard. There are also fair use defenses available. It's complicated. But please don't ignore that DMCA take down notice just because you didn't copy an entire song or show. That would be a bad move.