Robert Stack will emcee the 1998 Cinema Audio Society Awards ceremony on March 7, at the Universal Sheraton Hotel in Universal City.The awards will recognize outstanding achievement in sound mixing in motion pictures and television. Renowned re-recording mixer Richard Portman has been selected to receive the CAS Career Achievement Award. Stack has hosted NBC’s reality-based series “Unsolved Mysteries” since 1988. He starred and co-produced the television FBI drama “The Untouchables,” from 1959 to 1963. CAS was formed in 1964 to educate sound mixers on new technological advances in their industry.