6x CD Box Set The Hollywood Edge HPX Digital Sound FX Library. Pre-owned in very good condition except one of CD the case is loosen broken a bit see last photo. 16-bit / 44.1 kHz Resolution. Cue Sheet for Search and Placement of FX. 2549 Royalty Free Sound Effects.HPX Digital Sound FX Library is a multi-platform sound effects library with the added convenience of both audio and data file formats for post production. HPX allows access, storage, and placement of sound effect elements within your production. 2549 royalty free sound effects.