73 Pa. Stat. § 612
The following words and phrases when used in this act shall have the meanings given to them in this section unless the context clearly indicates otherwise:
"Performing group." A vocal or instrumental group seeking to use the name of another group that has previously released a commercial sound recording under that name.
"Recording group." A vocal or instrumental group at least one of whose members has previously released a commercial sound recording under that group's name and in which the member or members have a legal right by virtue of use or operation under the group name without having abandoned the name or affiliation with the group.
"Sound recording." A work that results from the fixation on a material object of a series of musical, spoken or other sounds regardless of the nature of the material object, such as a disc, tape or other phono record, in which the sounds are embodied.
73 P.S. § 612