The legislative history of the Copyright Act bolsters this reading. The House Report on the Copyright Act distinguished between sound recordings and phonorecords, stating that “[t]he copyrightable work comprises the aggregation of sounds and not the tangible medium of fixation. Thus, ‘sound recordings’ as copyrightable subject matter are distinguished from ‘phonorecords[,]’ the latter being physical objects in which sounds are fixed.” H.R. Rep. No. 94-1476, at 56 (1976). Similarly, the House and SenateReports on the Act both explained: