Surround Receivers

3 Comments on What is DTS-HD and DTS-HD Master Audio?

  1. Anthony The Koala Avatar

    I have played a BD movie with 5.1 DTS-MA through both the optical output to a processor, a combined processor/amplifier. The processor automiatically decoded a dts stream. I played the same movie whose player’s hdmi output went to an LPCM 7.1 decoder, like the Cypress CLUX-11SA or A3830A sold by Altronics (Australia). In this situation,

    I understand to output LPCM via HDMI, the BD player converts the (compressed) DTS-MA stream to an uncompressed LPCM stream in order for the LPCM decoder to decode the stream.

    A couple of questions please based on your article.
    * Generally, when the BD player players DTS-5.1 MA, does the BD player pick up both the high ‘detailed’ information as well as the core ‘dvd’ quality information.
    * Related to the first question. When the BD player plays the DTS-5.1 MA stream, through the optical (SPDIF) does the player just pick up the “core” 5.1 stream but discard the high resolution information.
    * Similarly, I played a BD movie with a Dolby HD track. Is there the same principle of Dolby HD having a core stream ‘dvd’ quality and a high resolution stream. Again when I play the movie through the optical to a processor/amplifier, it is able to detect that it is Dolby digital.
    * This is a question on perception of audio quality. I cannot perceive any difference in quality between optical audio which is dvd quality and HDMI audio lpcm. Or what am I supposed to perceive. For example should I use the Disney World of Wonder BD disk which is a test disk full of test sounds and test images. What attention should I pay in order to say, “…yes, there is a perceptible difference between dvd quality audio from the optical and HD audio via the HDMI….”

    Thank you,
    Anthony from Sydney Australia

  2. Bill Audette Avatar

    I recently purchased from “Rhino Entertainment LLC & The Warner Music Group Company” a Box Set that contains four Blu Ray DVDs encoded in “dts-hd Master Audio.” The 4 albums are by the 70s rock band, The Doobie Brothers. This Blu-Ray Box Set of audio DVDs is billed as “The Doobie Brothers Quadio.”
    I have two vintage 4-channel receiver units from the 1970s that still work: a Sansui QR 6500 and a Pioneer QX-949A. I just tried playing these audio DVDs through my old (2008) Panasonic DMP BD30 Blu Ray Disc player, with no luck. After several seconds, the display reads, “No Read.” I will assume that the player is too old to play these DVDs.
    So, can you give me some advice: 1) Please suggest to me some typical (preferably low-priced) players for these types of Blu-Ray audio discs and 2) Do these new Blu-Ray players come with 4 analog RCA output jacks into which I can plug 4 RCA-type cables that will feed one of my 4-channel receivers?

    Thanks for your time and expertise. Any assistance will be appreciated, Bill Audette

    • We’re only aware of a few reasons for that error: a bad disc, bad laser, or some issue with old firmware not recognizing an encoding format. However, that dts-hd Master Audio disc should have fallback audio that the player could read. If you can’t find updated firmware that fixes it, the problem may simply be the old player in combination with a newer disc (since I’m assuming it still reads other discs).

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