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Thread: A Tale of Two Speakers

  1. #11
    VIP/Donor [VIP/Donor] Folsom's Avatar
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    Quote Originally Posted by FrantzM View Post
    Excuse my simplistic query..

    When you are listening to the music that was on a mp3 or on a CD where do those "Terabytes of information per second" come from?
    Frantz, there's less information prior to the conversion of digital to analog with an MP3 or CD compared to DSD. After the speaker is still moving, so the amount of information it is presenting isn't really particularly different except in how it's doing so (we all know they sound different).

    However none of this is related to our ears to brain transfer of information. We don't have a direct digital connection to our brain. You could be standing outside on a relatively calm day and your ear might be transferring a relatively similar amount of information. It's based on the sound press level exerted on our ears, from everything; and our ears could read gaps in playback as information where on the digital side it appears as nothing. To our ears theirs information even when there "isn't".

    Unfortunately I don't believe anyone's uncovered what exactly the huge transfer of information between our ears and brain even happens to be. It's perplexing given our limited frequency range we pick up on. But it may be incredibly sensitive to the smallest of small differences between things in the spectrum we do pick up on. Now what we can do with it, especially consciously, seems less impressive when we're put to a short test. But training has shown to improve interpretation ability. For example a blind person can echo locate so well they get a blurry grey image as if they had eyes that worked rather poorly. A Dolby engineer can exceed 50% guessing in an ABX test. It appears to be a very honed ability and even then tends to specialize to necessity that isn't necessarily related to our hobby.

    I wonder if having a blind person that's very good at echo locating evaluate a recording of a saxophone on our stereos would be interesting, for them to compare it to the mental image they'd get from a live one.

  2. #12
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    Quote Originally Posted by Folsom View Post
    Frantz, there's less information prior to the conversion of digital to analog with an MP3 or CD compared to DSD.
    That is a huge understatement. 128 kbps MP3 has more than 90% of the origin data thrown away. Yet by carefully doing that according to how we hear, it sounds nearly the same as the CD. Take the CD and just randomly throw out 90% and it won't sound anything like music.

    However none of this is related to our ears to brain transfer of information.
    It is because without that understanding, MP3 would not work. You can hear a pair of headphones and with special processing, think there are sounds behind you and in front of you. Again, that is done by the science that explains how our perception works.

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