User guide

MS-DMT Guide v1.04
Released 05-30-2014
49
PC SOUND DEVICE DRIVER
All sound devices under Windows (and most all operating systems) require a device driver. A
driver is a low-level program that handles the data connections between the physical hardware
and the operating system. Traditionally the manufacturers of sound devices provide drivers for
their sound device hardware or family of sound device hardware. However, since Microsoft's
Universal Audio Architecture (UAA) initiative, which supports HD Audio, FireWire and USB audio
device class standards, a universal class driver by Microsoft can be used.
It is usually best to use the latest specific manufacturers’ driver for your sound device if one
exists, where all features not required for modem use are disabled, if possible and other
parameters are configured for the best modem use performance. The use of the latest driver
may even lower your sound device sample clock error which is a critical parameter in the
operation of this software.