Audiotrak USA
Consumer products division of ESI specializing in internal and external PC audio solutions.

Creative Technology
Manufacturer of the industry leading Sound Blaster line of PC audio cards.

Hercules/Guillemot
Multimedia computer component manufacturer that makes several lines of PC audio expansion cards.

M-Audio
A company that specializes in professional Midi audio products that also has a line of consumer PC audio solutions.

Philips Electronics
Consumer electronics company that also produces a line of PC sound cards.

Terratec Promedia
Manufacturer of high end Aureon line of PC audio cards.

Turtle Beach
Company specializing in computer audio products.