Misses information implicit in visual layout. Steps 1 and 3 constitute the user interface Speech Enabling Applications Treat speech as a first class medium. Application produces its own feedback. Exploit features of the spoken medium. Audio output independent of visual display.
Advantages Produce intuitive feedback.
Provide a simpler user model. Reduces users cognitive load. Direct Spoken Interaction Easy to perceive relevant information. Design a core set of services for the audio desktop. Base application-specific extensions on these core services.