Onkyo 605/HDXE1/BD350 - No rear speakers on 7.1

Discussion in 'Blu-ray & DVD Players & Recorders' started by BISHI, Feb 1, 2009.

  1. BISHI

    BISHI
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    I know I posted here earlier and I thought I had it sorted, but I seem to have been wrong.

    I cannot get any sound from my back 2 speakers, test tone goes to all speakers from the amp and true HD lit up on amp...... so where has the signal gone..... desperate to experience 7.1 properly .....help:lease:
     
  2. Big_Si_Owen

    Big_Si_Owen
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    Is the disc in True HD 7.1? Not many out there are so you won't get any signal through your rears in that situation
     
  3. BISHI

    BISHI
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    I bet thats all it is............ Just watched the start of Starship troopers 3 and the intro came through all 7 and when the film started they dropped out... How can I tell if a movie is 7.1.....
     
  4. Big_Si_Owen

    Big_Si_Owen
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    It should say on the back in the "Audio specifications" bit that's on a lot of discs.
     
  5. BISHI

    BISHI
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    Cheers, I'm a bit of a spud for not realising that......
     
  6. Big_Si_Owen

    Big_Si_Owen
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    Hehehe, not at all! :rolleyes:


    :rotfl:


    Took me ages to find it out too as I've gone through exactly the same issue! I can share my little bit off knowledge now! :)
     
  7. thenicklouse

    thenicklouse
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    yep it is a Dolby TrueHD 5.1 sound track.
     
  8. BISHI

    BISHI
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    Whats really annoying is the back 2 on 5.1 are the middle 2 on 7.1 which mean I have to keep moving my speakers . Now that sounds like a lack of forward thinking to me !!
     
  9. Big_Si_Owen

    Big_Si_Owen
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    If you look in the manual (P14-15) at the recommended positioning of the speakers the surrounds on the 5.1 go in the same place as the middles on 7.1 though.

    Different sort of effect to what you may be used to but it works really well with bi polar speakers or those with a wide spread.
     
  10. thenicklouse

    thenicklouse
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    Mad.
    just position them correctly, surrounds at the side and surround backs at the back. then use a surround mix to take the 5.1 tracks to a 7.1.

    you will be surprised with the results.
     
  11. BISHI

    BISHI
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    Is there a DSP setting on th ONKYO for 'virtual ' 7.1 from 5.1 . ( I posted a similar question in Blu ray section)
     
  12. jwlawler

    jwlawler
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    I think that I answered this in the BluRay forum. At that time, I didn't notice that you had the same amp as me. Now that I know, I can say, yes you have several such modes. There are several listening modes (Dolby PLIIx and DTS Neo:6) which do this. See page 66 in the manual or just have a play.

    One odd thing with my Panasonic BD35 is that it seems to assume that a DTS HD MA source is 7.1 and if it decodes it tells the amp that the signal is PCM 7.1 but two of the channels will be silent. In this case, I don't think that the amp will offer the extension modes (it will just think that it is a rather dull 7.1 soundtrack). However, in bitstream mode when the amp decodes, it detects that the signal is 5.1 and will offer the extension modes. I don't know if your player does the same but some of your comments suggest that it does.

    I am still waiting to hear real 7.1, I still don't have a suitable disc.
     
    Last edited: Feb 3, 2009
  13. BISHI

    BISHI
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    The wierd thing is that on the set up screen you get the DSP options for 5.1 and DTS bot you get none for tru hd ( I think the only options ar TruHD, Direct, and last...... No DSP option at all. This makes me think that the PLIIX movie dsp will only be applied to a DD5.1 signal. I'll have a tinker when the Mrs is out ..
     
  14. jwlawler

    jwlawler
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    I have not set up my 7.1 for a while so I cannot easily check at the moment. One explanation may be linked to the odd thing that Audyssey does not run while the amp is decoding TrueHD. Watch the Audyssey light when playing a TrueHD track. The explanation seems to be that the amp does not have enough processing power. So, this means that, contrary to popular preference, it is probably better to decode in the player than the amp. If the amp does not have the processing power for TrueHD and Audyssey, it may not have the power to do TrueHD and PLIIx. So, if your player has the annoying habit of saying that everything is 7.1 when it decodes, you have a problem.

    I won't be setting up my 7.1 until a 7.1 disc arrives from LoveFilm but when one does, I will play with this.

    I have just looked at the manual again more carefully and it appears to confirm what you have found. PLIIx and Neo:6 are not available for TrueHD sources. There are available for Dolby Digital Plus which is quite common on HD DVDs. Presumably the discs on which I have seen PLIIx working are DD+ rather than TrueHD. Many BDs have uncompressed PCM tracks, you may expect that these would be easy for the amp but the manual suggests that PLIIx is not available for them either.

    Rather upsetting.
     
  15. BISHI

    BISHI
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    But what is best............. Tru HD on 5 channels or DD+/EX with DSP on 7 ??
    When the Mrs is out I will crank it up and compare..
     
  16. thenicklouse

    thenicklouse
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    not got the 605 but on the 805 i run the 5.1 tru and DTS MA through all the speakers in the 7.1 set up.

    I will have a look at the 605 manual later and see what options you have.
     
  17. jwlawler

    jwlawler
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    After writing my previous reply, I was wondering that myself but I could not answer it. It is probably subjective anyway and could vary from disc to disc. The difference between DD+ and the lossless formats is often very small so it is certainly worth trying DD+ to get all the channels.

    Let us know what you find.
     
  18. thenicklouse

    thenicklouse
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    Ok just tested for you. Not the same kit but similar.

    A Harry Potter HD DVD with DD Tru HD track selected. Amp playing the HD Tru track 5.1.

    Plx mixes to 7.1 . Dolby EX has it at 7.1. even the neo:6 has the rears working.
     
  19. jwlawler

    jwlawler
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    Thanks, so your 805 can do it but our 605s may still fail. I remember in the thread about TrueHD and Audyssey not working together on the 605 that the 605 seems to have less processing power than some of the higher models.
     
    Last edited: Feb 4, 2009

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