Why does 5.1 change to 2-channel audio via optical cable?

aaronbetsy
aaronbetsy Posts: 1
edited August 2013 in 2 Channel Audio
Why does 5.1 change to 2-channel audio via optical cable?
Post edited by aaronbetsy on
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  • tonyb
    tonyb Posts: 32,963
    edited July 2013
    It doesn't unless you have a system setup wrong, List your gear, how you have it wired up, and what your trying to accomplish and we can better help you.
    HT SYSTEM-
    Sony 850c 4k
    Pioneer elite vhx 21
    Sony 4k BRP
    SVS SB-2000
    Polk Sig. 20's
    Polk FX500 surrounds

    Cables-
    Acoustic zen Satori speaker cables
    Acoustic zen Matrix 2 IC's
    Wireworld eclipse 7 ic's
    Audio metallurgy ga-o digital cable

    Kitchen

    Sonos zp90
    Grant Fidelity tube dac
    B&k 1420
    lsi 9's
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  • nguyendot
    nguyendot Posts: 3,594
    edited July 2013
    Depends how it is set up.
    Main Surround -
    Epson 8350 Projector/ Elite Screens 120" / Pioneer Elite SC-35 / Sunfire Signature / Focal Chorus 716s / Focal Chorus CC / Polk MC80 / Polk PSW150 sub

    Bedroom - Sharp Aquos 70" 650 / Pioneer SC-1222k / Polk RT-55 / Polk CS-250

    Den - Rotel RSP-1068 / Threshold CAS-2 / Boston VR-M60 / BDP-05FD
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  • RamZet
    RamZet Posts: 792
    edited July 2013
    Are you going optical out of a Samsung TV?
    B&W CM9Classé Sigma
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  • zingo
    zingo Posts: 11,258
    edited July 2013
    Are you trying to use Dolby TrueHD?
    Jake
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  • RamZet
    RamZet Posts: 792
    edited July 2013
    Lets start from the beginning. What is your source?

    is the optcal out from a DVD player, computer, cable box, apple tv?

    most of the time you need to go to the audio settings of the source and turn off PCM, turn on 16bit, switch from PCM or DTS over to dolby digital.

    Even if your surround sound processor is set to 2ch or dolby prologic music it will switch to dolby digital 5.1 when it gets the dolby signal from the source.

    So, What is the source?
    B&W CM9Classé Sigma
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  • tonyb
    tonyb Posts: 32,963
    edited July 2013
    I guess the OP is MIA, maybe never really had an issue or figured it out for himself.
    HT SYSTEM-
    Sony 850c 4k
    Pioneer elite vhx 21
    Sony 4k BRP
    SVS SB-2000
    Polk Sig. 20's
    Polk FX500 surrounds

    Cables-
    Acoustic zen Satori speaker cables
    Acoustic zen Matrix 2 IC's
    Wireworld eclipse 7 ic's
    Audio metallurgy ga-o digital cable

    Kitchen

    Sonos zp90
    Grant Fidelity tube dac
    B&k 1420
    lsi 9's
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  • GFOviedo
    GFOviedo Posts: 353
    edited July 2013
    I hated when OP go MIA. I wanted to know if the problem was solve or not. I had someone asked me this before, and I wasn't really sure how to answer it.
    AVR: DENON X4000
    FRONT L/R: ARX A3RX-C
    CENTER: ARX A2RX-C
    SURROUND L/R: ARX A3
    SUBWOOFER: PSA-XV15

    SERVER: UNRAID 15TB
    MEDIA PLAYERS: DUNE SMART SERIES D1
    HDTV: VIZIO M601D-A3R
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  • leftwinger57
    leftwinger57 Posts: 2,917
    edited August 2013
    I use an optical toslink w/ my Yamaha RX-V655 and get full 5.1 actually it says 7.1 but I use the zn 2 feature to run a set of bookies in the bdrm.You can not do both and I don't need 7.1.Got know what he's using.
    2chl- Adcom GFA- 555-Onkyo P-3150v pre/amp- JVC-QL-A200 tt- Denon 1940 ci cdp- Adcom GFS-6 -Modded '87 SDA 2Bs - Dynamat Ext.- BH-5- X-Overs VR-3, RDO-194 tweeters, Larry's Rings, Speakon/Neutrik I/C- Cherry stain tops Advent Maestros,Ohm model E

    H/T- Toshiba au40" flat- Yamaha RX- V665 avr- YSD-11 Dock- I-Pod- Klipsch #400HD Speaker set-

    Bdrm- Nikko 6065 receiver- JBL -G-200s--Pioneer 305 headphones--Sony CE375-5 disc
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  • GFOviedo
    GFOviedo Posts: 353
    edited August 2013
    I know that toslink / SPDIF cable isn't capable to carry DTSMA / True HD. It can only carry the core DTS / DD sound track. You can change the audio setting from your AVR, and make it a 7.1 extended stereo set up.
    AVR: DENON X4000
    FRONT L/R: ARX A3RX-C
    CENTER: ARX A2RX-C
    SURROUND L/R: ARX A3
    SUBWOOFER: PSA-XV15

    SERVER: UNRAID 15TB
    MEDIA PLAYERS: DUNE SMART SERIES D1
    HDTV: VIZIO M601D-A3R
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