7. The in-vehicle audio system of claim 6 , wherein in response to receiving a command to delete one or more items of audio content from the storage device, the compiler updates the vocabulary dictionary by compiling at least a portion of the vocabulary dictionary.
6. An in-vehicle audio system having a speech recognition feature, the in-vehicle audio system comprising: a storage device for storing audio content, each item of the audio content having a respective word or a respective phrase associated therewith; a microphone for receiving voice input; a speech recognition component for recognizing spoken words of the received voice input, the speech recognition component including a vocabulary dictionary for use in recognizing spoken commands in the received voice input; and a compiler for compiling the vocabulary dictionary while new audio content is being added to the storage device such that phonetics corresponding to a respective word or a respective phrase associated with each added item of the new audio content is included in the vocabulary dictionary as a result of the compiling, wherein: the compiler begins compiling the vocabulary dictionary while the new audio content is being added to the storage device, the compiler completes the compiling the vocabulary dictionary before the new audio content is completely added to the storage device, the speech recognition component is capable of recognizing the respective word or the respective phrase associated with the each added item of the new audio content after the compiler completes compiling the vocabulary dictionary, speech recognition control is available after the compiler completes the compiling the vocabulary dictionary, the speech recognition control related to the each added item of the new audio content becomes available after completion of adding the new audio content to the storage device, and the compiler is further for compiling the vocabulary dictionary, during a shutdown process, to delete, from the vocabulary dictionary, phonetics corresponding to a respective word or a respective phrase associated with each item of audio content to be deleted from the storage device, the shutdown process having been initiated by detecting an ignition of a vehicle, including the in-vehicle audio system, being turned off.