"Although Defendant did copy many isolated, factual elements from ADC atlases, factual appropriations per se do not constitute copyright infringement. "
I work for a map publishing company and am also an amatur musician. All map companies are working under a weakened copyright protection cause by the Supreme Court case of Feist Publications, Inc. v. Rural Telephone Serv. Comp., Inc., 499 U.S. 340, 111 S.Ct. 1282 (1991). I am NOT a lawyer. Because maps are "compilations" they are not granted copyright protection only if it "features an original selection or arrangement of facts".
The ruling when in part like this:
"Although Defendant did copy many isolated, factual elements from ADC atlases, factual appropriations per se do not constitute copyright infringement. "
Tablature may also fall under this catagory.