Results 1 - 15 of 15 - LOT OF 3 C-Media Crystal sound card PCI audio adapter CMI PCI-6ch-MX A Crystal: ACSCM. Tested and working. The C-Media CMI chip can be found on many PCI sound cards. The card I used for testing and reviewing is from AOpen, it is the Cobra AW The card. Jump to PCI audio - C-Media Electronics, Inc is a Taiwan computer hardware company that CMI; CMISX; CMILX; CMIMX; CMI; CMI+ (Dolby Digital Live Encoding); CMI; CMI (Dolby Digital.