In this monthly column, an industry expert will answer common questions about VoiceXML and related technologies. Readers are encouraged to submit questions about VoiceXML, including development, voice-user interface design, and speech technology in general, or how VoiceXML is being used commercially in the marketplace. If you have a question about VoiceXML, e-mail it to and be sure to read future issues of VoiceXML Review for the answer:

Have you ever wrestled with how to add fast forward and reverse functionality during audio playback in your VoiceXML application? This month, Matt Oshry presents a rather clever server-side solution to this problem, utilizing the ubiquitous sox utility. They don’t teach you this stuff in school!

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