Quantum Logic Sound System
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Thread: Quantum Logic Sound System

  1. #1
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    Quantum Logic Sound System

    Noticed when playing music in Kia SXL 2016, I would check the Quantum Logic sound and find it was off.  Checked manual.  Absolutely nothing in manual on this.  Asked local Kia dealer.  They suggested that if playing with ipod connected, there may be songs on my ipod that do not have Quantum Logic ability and the system automatically turns off and stays off.  You have to manually put it back on.  Just another mystery solved in the maize of quantum physics.

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  3. #2
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    I'm not sure on this, but I am curious what is causing all of the " " in your post to show up.





  4. #3
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    Quote Originally Posted by flugelboneman View Post
    They suggested that if playing with ipod connected, there may be songs on my ipod that do not have Quantum Logic ability and the system automatically turns off and stays off. You have to manually put it back on Just another mystery solved in the maize of quantum physics.
    The (underlined) statement when read by itself would seem to make little sense since it's not as if when using an MP3 (or other audio format) encoding tool (iTunes, MP3Soft, etc.) to burn MP3 files it's possible to specify "Quantum Logic compatibility", although TBH I can't fully quantify my statement since I've not read up on every single MP3 encoder in existence. Having said that, perhaps the following theories might hold water to support the dealer's guess about certain songs affecting QL--read on...

    OP--what format are the songs on your iPod encoded in--are they MP3, AAC, or some other format? Also, are all/some of the songs encoded with a fixed bitrate or variable bitrate? What bitrate (e.g., 192 Kbps, 320 Kbps) are your songs encoded at? Finally, are your songs encoded at a 44.1 kHz or 48 kHz (or a mixture of both) sampling rate? Perhaps a corrupted or odd ID3 tag might be triggering the QL setting? Although the Kia Multimedia Manual details that bitrates from 32 to 320 Kbps are supported and sampling rates of 44.1 and 48 kHz are supported--it could be possible that some UVO firmware bug might rear its head depending on some odd bitrate/sampling rate combo. The Multimedia manual also has a small disclaimer stating that the sound quality of MP3 files that use bitrates exceeding 192 Kbps cannot be guaranteed, so perhaps that might be a factor? The disclaimer also mentions that when using MP3 files not encoded at a fixed bitrate, some features (e.g., FF/REW) may not properly operate.

    Another thought/idea--would it be possible for you to load your iPod songs onto a USB stick, then play your music off of the stick and see if the same issue occurs?

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  6. #4
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    Quote Originally Posted by tonester View Post
    Another thought/idea--would it be possible for you to load your iPod songs onto a USB stick, then play your music off of the stick and see if the same issue occurs?
    I use USB MP3 with iTunes transfer of CD to File at 44 kHz and 192 Kbps. Amazon dnloaded songs on the USB show 256. I always post about chk'ing Setup/Sound/Advanced Tab as I DO have to Re-set Quantum to ON occasionally. Oddly, it Does sound better when you turn it back On but it's also easy to not notice = a somewhat paradoxical reality.
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  7. #5
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    LOL now you got me a bit OCD on checking my sound settings a bit more often to see if the QL is still enabled, although for the roughly half-dozen times or so in the past when I had the opportunity to check, I have found QL to be (still) enabled every time. I play all of my MP3s exclusively off of my iPhone, and in CarPlay mode--my MP3 files are a mixture of fixed (minimum 192, max 320) and variable bitrate (max 320) files; I've not played my MP3s off of a USB stick, although I have on rare occasion played MP3s off my iPhone in BT mode--wonder if playing them over BT might possibly/eventually trip the QL setting...hmmm.

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