|This PCI USB2.0 extension card is tested to work with all USB1.1 and USB2.0 soundcards supported by our drivers.
Basically it enhances the number of available USB ports on your computer. But on top of that it gives you USB2.0 ports with high quality and better USB clock stability. With most USB1.1 audio designs this will reduce jitter in the audio, leading to better sound quality.
On USB1.1 ("USB fullspeed") there's a couple of external soundcards available causing problems with some computers. One issue is full scale white noise setting in after a while, another one constant glitching in sound. In some cases the device is not even detected. In many of those situations this PCI USB2 card is suitable for solving the problem.
With some multichannel USB2.0 soundcards the computer's built-in USB is not capable of processing all the channels (e.g. CPU load goes to 100%) or doesn't provide the necessary bandwidth (bad sounding audio, which returns to normal reducing the samplerate or number of channels). The VIA chip on this PCI USB2 card is the fastest one we know of and can solve those issues.
Please contact us for further information if you have any questions about if this might apply to your USB soundcard.
The Ploytec PCI USB2 extension card is available at EUR 14.90 (plus EUR 5.00 postage) in Europe only.