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In Reply to: Does a sources time coherence matter. posted by gymwear5@hotmail.com on February 23, 2007 at 07:22:22:
Sorry this took so long to reply to.....been busy. Any single, high-quality microphone used to record instruments is quite time-coherent (without resonance) from ~200Hz to at least 7kHz. Even if the resulting mix combines three omni-directional mics that happened to pick up some of each other's sound (which any recording engineer should tell you is a dumb thing to allow them to do), the audible result is still three time-coherent sources, but now overlaid with a haze of those softer out-of-synch sounds. Telarc classical records were/are? prime examples of three spaced omni mics. They used them because they were better-sounding mics than the equivalent cardioid mics, which is often the case. One result is a very 'phasey' sounding treble. Another is a vague stereo image.
The Mercury classical recordings physically separated the left, right, and center portions of the orchestra by eight to ten feet, to reduce inter-microphone crosstalk between their three mics, a layout of the orchestra which would not sound right to a live audience. What makes their recordings a little bright is not just a characteristic of the old mics, but also that the mics were often on stage, and thus much closer to the performers than the audience (so that there was not too much reverberation heard by the mics). Anytime one moves closer to a musical instrument or a voice, the tone balance changes, getting brighter, with more low bass and more dynamic spread between the peak levels and the softest levels.
Again, sorry for the delayed response.
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- Re: Does a sources time coherence matter. - mauimusicman 12:48:39 02/28/07 (0)
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