The WM975 AMR is an audio only daughter card implementation of the Intel Audio Modem Riser (AMR) Rev 1.1 specification . This card can also be used in systems supporting the ACR 1. specification.
The design supports the connectivity requirements of a typical sound card. Inputs include Phone, AUX, Video, CD (Mitsumi and Sony types) and two Mic inputs. Outputs include Line Out, Mono, Headphones and digital SPDIF.
The WM975 Audio CODEC used in the design is fully compliant with the Intel AC?97 Rev 2.2 CODEC specification, supporting primary/secondary ID selection, variable audio and modem sample rates, a digital SPDIF output and the additional function of an integrated touch screen controller.
