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Damn you Bennett!
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<blockquote data-quote="John Roberts" data-source="post: 15857" data-attributes="member: 126"><p>Re: Damn you Bennett!</p><p></p><p></p><p></p><p></p><p></p><p>Some cheap sound sources may use a single DA converter to generate both outputs and alternates between Left and Right. This could make a mono signal have a time offset between left and right channels. I can't immediately see how this would cause a rising trend. It seems more like a falling trend would result as the equivalent phase shift created by the fixed time offset becomes more significant at higher frequency. </p><p></p><p></p><p></p><p>Combining identical sine waves in phase is +6dB, +/- 90' (total) is only +3dB (or 3dB less than in phase), and +/-180' is a null. So I would expect a gradual roll-off as effective phase shift increases. </p><p></p><p></p><p></p><p>Perhaps it is something else? </p><p></p><p></p><p></p><p>JR</p></blockquote><p></p>
[QUOTE="John Roberts, post: 15857, member: 126"] Re: Damn you Bennett! Some cheap sound sources may use a single DA converter to generate both outputs and alternates between Left and Right. This could make a mono signal have a time offset between left and right channels. I can't immediately see how this would cause a rising trend. It seems more like a falling trend would result as the equivalent phase shift created by the fixed time offset becomes more significant at higher frequency. Combining identical sine waves in phase is +6dB, +/- 90' (total) is only +3dB (or 3dB less than in phase), and +/-180' is a null. So I would expect a gradual roll-off as effective phase shift increases. Perhaps it is something else? JR [/QUOTE]
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