Existing computer supported co-operative work (CSCW) systems for group communication typically require some amount of keyboard input, and this may limit their usefulness. A voice input prototype system for asynchronous (time separated transactions) group communication (AGC) with simulated conversion to text was developed and an experiment constructed to investigate if advantages over conventional keyboard input computer conferencing were possible for the information exchange task. Increases in words used and facts disclosed were higher for voice input compared to text input, which implies that voice input capability could be advantageous for future asynchronous group communication systems supporting information exchange.