ScanSoft ICD-BP150VTP Dragon Naturally Speaking 6 User Manual page 149

C H A P T E R 1 1
Text-to-speech (Preferred edition only)
On most computers, you cannot give Dragon NaturallySpeaking voice
commands while the program is reading to you or playing sound back. This is because
most sound cards cannot listen to you at the same time that they are playing sound.
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