GENERAL DESCRIPTION
It supports the upcoming Microsoft™ DirectMusic API and is fully compatible with DLS Level 1 (downloadable samples) specification. The LM4560 is optimized for Microsoft Windows™ 98 and Windows NT5.0 WDM streaming architecture with re-routable end-point support. The LM4560 includes DirectSound3D acceleration hardware for ITD (Interaural Time Difference), IID (Interaural Intensity Difference), Pan, Delay, and Doppler hardware. The LM4560 supports Sound Blaster Pro/16 DOS games while improving gaming audio quality. The LM4560 supports both the legacy analog gameport and a Digital Enhanced Game Port. When coupled with DirectInput™ driver, the Digital Enhanced Game Port can save up to 12% of the CPU overhead nominally required by a conventional analog game port. The LM4560 employs a high precision 26-bit digital mixer, providing an accurate 20-bit output and higher than 90 dB signal-to-noise ratio when used with high quality AC97 Rev 1.03 and Rev 2.0 codecs. The LM4560 is designed with aggressive power management.
National Semiconductor
