Yes, CDs are used quite commonly -- the Seattle Art Museum has a particularly good tour, in my opinion. Another option is digital memory chips, much like those used in a PC. The Shedd Aquarium's Fish Phone uses these, as do many other institutions. The two largest audio tour companies in the US, Antennae and Acoustiguide, can supply information on CD, digital, and tape systems. Jodi Lox Mansbach Director of North American Accounts Acoustiguide 1700 North Pelham oad Atlanta, Georgia 30324 Phone (404) 892-4239 Fax (404) 892-3426 Corporate 1301 Avenue of the Americas 32nd Fl. NY NY 10019 Phone (212) 974-6600 Fax (212) 974-6607 (They did the Shedd's Fish Phone) Chris Teller Chairman and Co-CEO Antenna Audio PO Box 176 Sausalito, Cal. 94966 Phone (414) 332-4862 Fax (414) 332-4870 [log in to unmask] (They did the Seattle Art Museum tour) I am merely passing the information along; no recommendations or endorsements are made or implied. Eugene Dillenburg Lead Developer, Philippines Coral Reef exhibit John G. Shedd Aquarium 1200 South Lake Shore Drive Chicago, Illinois 60605 V: (312) 692-3136 F: (312) 939-8001 e: [log in to unmask] "Nobody expects the Spanish Inquisition!" -- M. Python, Episode 15, 1970