Right-click on the ear icon and select ENABLE ATTENTION WORD. The blue square next to that option should change to a gray square, indicating that this option has been disabled. With this option disabled, you will not be able to put HAL into listening mode by saying the attention word programmed in the Personal Assistant Configuration screen. However, because HAL is no longer actively listening for the attention word, it is no longer using the sound card. You can now start a music CD or play an MP3 file or something similar. When you wish to interact with HAL, you will need to stop that program (stop it, not necessarily close it). You can then left-click on the ear icon to get HAL's attention. Once you're done interacting with HAL, left-click on the ear icon to take HAL out of listening mode, then resume playing the music file or related program.