An audio user interface that generates audio prompts that help a user interact with a user interface of a device is disclosed. One aspect of the present invention pertains to techniques for providing the audio user interface by efficiently leveraging the computing resources of a host computer system. The relatively powerful computing resources of the host computer can convert text strings into audio files that are then transferred to the computing device. The host system performs the process intensive text-to-speech conversion so that a computing device, such as a hand-held device, only needs to perform the less intensive task of playing the audio file. The computing device can be, for example, a media player such as an MP3 player, a mobile phone, or a personal digital assistant.