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Received this item as satisfactorily as possible, and promptly, but before installing it (for a neighbor's high def TV), I called the techs at Gefen to be certain it would operate properly for this application. Answer (from Gefen): no. No because high def channels broadcast audio in 5.1, which this converter is incapable of processing. In other words, it will work with a digital non-high def signal, but not with a channel broadcasting high def with 5.1 surround sound. The solution: Gefen model GTV-DD-2-AA, slightly more expensive, which processes any/all digital audio signals. Not having verified the accuracy of what the Gefen tech told me, at least I want to give buyers a "heads-up" about the product.