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The Basement
Zoom H4N Pro as audio interface: popping sound in certain frequency range
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<blockquote data-quote="Paul Johnson" data-source="post: 216132" data-attributes="member: 2643"><p>I'm not hearing any popping - just the strange modulation and distortion. First thing is to record onto the Zoom's card and then read that into the MacBook - this will cut out the processing stages in the zoom, in case its a codec issue, but I have the feeling what it is, is simple overloading of the internal mics. How close were the mics to the sax? It sounds very close and very loud. Is the artefact there when you play quieter? If you hear the artefact when you record direct to the card then this points to the problem being very early on in the recording chain. Condensers, when they are overloaded by volume often make these odd warbles. First thing I'd do is repeat the test, moving the recorder to a more distant location and see what the purity is like. </p><p></p><p>It's also possible what you are recording is arriving at the mics by two or more routes - so with the octave key pressed, most sound is obviously coming from just the lower holes, but there is a little sound coming from the top, and the two could be coupling. Again, changing mic positions might help. If your phone has a SPL app, it could be worth just seeing how loud that playing style registers. The lack of vibrato suggests you're using a higher number reed and a big lung full of air - so try recording the same notes but play more quietly and see if the unpleasant artefact reduces.</p></blockquote><p></p>
[QUOTE="Paul Johnson, post: 216132, member: 2643"] I'm not hearing any popping - just the strange modulation and distortion. First thing is to record onto the Zoom's card and then read that into the MacBook - this will cut out the processing stages in the zoom, in case its a codec issue, but I have the feeling what it is, is simple overloading of the internal mics. How close were the mics to the sax? It sounds very close and very loud. Is the artefact there when you play quieter? If you hear the artefact when you record direct to the card then this points to the problem being very early on in the recording chain. Condensers, when they are overloaded by volume often make these odd warbles. First thing I'd do is repeat the test, moving the recorder to a more distant location and see what the purity is like. It's also possible what you are recording is arriving at the mics by two or more routes - so with the octave key pressed, most sound is obviously coming from just the lower holes, but there is a little sound coming from the top, and the two could be coupling. Again, changing mic positions might help. If your phone has a SPL app, it could be worth just seeing how loud that playing style registers. The lack of vibrato suggests you're using a higher number reed and a big lung full of air - so try recording the same notes but play more quietly and see if the unpleasant artefact reduces. [/QUOTE]
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Zoom H4N Pro as audio interface: popping sound in certain frequency range
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