The Alpha USB is an asynchronous High Speed USB to digital audio interface
that extracts the highest possible audio quality from computer audio
The Alpha USB features a High Speed USB 2.0 input data connection and switch
selected audio output signal type – either coaxial SPDIF using a BNC connector
or balanced AES using an XLR connector. Sampling rates up to 192 kHz and word
lengths up to 24 bit are supported.
Great care was taken in the design of the Alpha USB to isolate the noisy
computer/USB environment from the digital audio output. The USB receiver and
processing are powered by the computer, while the output master clocks and line
drivers are powered by a separate isolated linear power supply.
Two key factors combine to achieve the excellent audio performance of the
Alpha USB - the unprecedented degree of electrical isolation between the USB
input connection and the audio output and the very low noise/low jitter
performance of the individually tested audio output master clocks.
The Alpha USB is designed to work with both Apple Macintosh and Windows PC
computers. Apple Macintosh computers using Snow Leopard or later operating
systems have a High Speed USB Audio Driver that interfaces directly with the
Alpha USB. It is not necessary to install a special driver. Microsoft Windows
PC’s require the included Alpha USB Windows driver which works with Windows XP,
Vista and 7.
A User’s Guide, Windows driver CD and 6’ power cord are included with the