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Ducking is a technique that has been in use ever since the early days of radio, when music tracks or ‘beds’ were reduced in volume so that a voiceover could be heard over the top. Initially performed manually, as technology progressed it was subsequently done automatically. In GarageBand, the effect can be created by using a simple two- button system to set some tracks as lead tracks and others as backing tracks. The edit tab of the Master Track then gives you the opportunity to tailor the response of the effect, offering control over the sound. So, to add that professional-sounding radio station touch to your podcasts, read on.