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General Asylum General audio topics that don't fit into specific categories. |
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General Asylum General audio topics that don't fit into specific categories. |
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In Reply to: RE: Video: The Distortion of Sound... posted by Todd Krieger on July 20, 2014 at 23:04:12:
It is possible to record without a filter at 44 kHz. If you do so then you will get horrible distortion, for example if you attempt to record a square wave you will get audible beat tones lower than the fundamental frequency. If a square wave is swept up in pitch some beat tones will move down in pitch, etc., making the distortion obvious.
It is possible to record with a filter that is not steep. If you do so, then there is a choice. Either the filter severely rolls off the high frequencies or it fails to filter out needed frequencies, in which case see above.
It is possible to record with a steep filter, but if this filter is excited with energy in its transition range the filter will ring. If the filter is linear phase it will create unnatural pre-ringing whereby high frequency noise appears prior to a musical transient. If the filter is minimum phase it will smear the sound after a transient for a longer period of time. Either method, or a tradeoff combining a mixture of the two, will result in some amount of changing tonality and/or unnatural imaging.
Software may bypass the laws of physics, but can not overrule the laws of mathematics. Of course none of these distortions matter to a (willfully) deaf person.
Tony Lauck
"Diversity is the law of nature; no two entities in this universe are uniform." - P.R. Sarkar
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Follow Ups
- RE: Video: The Distortion of Sound... - Tony Lauck 06:19:27 07/21/14 (1)
- RE: Video: The Distortion of Sound... - Barabajagal 06:48:28 07/21/14 (0)
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