cmictl sets some internal parameters of CMI 8338/8738-based sound cards. It allows you to utilize the S/PDIF out of your card. cmictl can control S/PDIF-in, S/PDIF-out, S/PDIF-loop, S/PDIF-monitor (SPDIF-in to Analog-out), S/PDIF-out voltage (5V / 0.5V), and S/PDIF frequency (48kHz / 44kHz). Some parameters are only available on CMI8738-based cards.
