http://www.soundblaster.com
2. Diamond
http://www.diamondmm.com
3. Yamaha
http://www.waveforce.com
4. Voyetra Turtle Beach
http://www.voyetra-turtle-beach.com
5. Aureal
http://www.aureal.com
6. Antex Electronics
http://www.antex.com
7. VideoLogic
http://www.videologic.com
8. MediaTrix
http://www.mediatrix.com
9. Xitel
http://www.xitel.com
10. Aztech
http://www.com.sg