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Digital 3.5mm jack to co-axial / composite

Discussion in 'AV Receivers & Amplifiers' started by Bondy007, Jun 17, 2003.

  1. Bondy007

    Bondy007
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    Hello everybody,

    I've got myself a cheapo surround sound system with an in-built AC3 decoder but I am having difficulty getting it connected to my PC in true surround sound style

    The system in question is the Acoustic Solutions LS1033 (£180) and it has three methods of input - Analogue Phono (coaxial left and right) - Digital Optical - Digital Co-axial/composite

    The sound card in my PC is a SB 5.1 Live and I am currently connecting it through one of it's 3.5mm analogue out connectors. I really want to use the dedicated digital output that is found on the sound card to connect to the *single* co-axial digital in on the amp- is there a cable that'll transport a digital signal from my SB 3.5mm connector to a single digital coaxial/composite

    I've looked everywhere for this sort of cable, do they exist?

    If not does anyone know of a cheap(ish) soundcard that has optical out?

    Cheers in advance

    Jamie
     
  2. micb3rd

    micb3rd
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    What you need is a mono 3.5 mm plug to RCA phono socket adapter then connect a standard 75 ohm digital coax lead to the above adapter.

    You plug the 3.5mm end into the sound card digital port and the phono end to the speakers digital in.


    Here is a picture of the adaptor.

    http://www.amabilidade2002.com/audio13.htm
     
  3. Bondy007

    Bondy007
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    Cheers Mate,

    So that would work for digital output (it doesn't need to be a stereo 3.5mm jack then) does digital just send it all down one channel with some extra bits to tell ur decoder/receiver/amp what speaker to play certain bits out of?

    Jamie
     
  4. micb3rd

    micb3rd
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    It is surposed to be a mono adapter because you only have one digital signal to hold all the channels of audio.


    IF you are using a DVD the you should get full Dolby Digital 5.1.

    For regular gaming the system will most likely default to Stereo or a Dolby Prologic mode.
     
  5. Bondy007

    Bondy007
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    Thanks alot,

    Just bought one of them lunch time (89p) and will be giving it a go tonight

    ;)
     
  6. micb3rd

    micb3rd
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    You may need to make sure you have 5.1 speakers enabled in your sound card software, i.e. Speakers icon in AudioHQ.

    Good luck.
     
  7. Oddbodd

    Oddbodd
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    Hi Bondy007, I've been looking for one of these aswell (posted a thread in pc gaming), could you let me know where to get one from?
    Cheers Oddbodd
     
  8. Bondy007

    Bondy007
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    Well it worked and after I had consulted the creative guide on connecting a surround sound system it seems that I needed to change the number of speakers in AudioHQ from 5.1 to 2, set it to digital output only. So now when DVD's are played my decoder converts it to full surround even though my pc only thinks i have two speakers.


    The adaptor I got from my local electrical shop "C Marks & Co" for 89 pence but they should be available from most AV stores.
     
  9. tom_nieto

    tom_nieto
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    I've got the same sort of setup, and it works if you get a standard 3.5mm mini plug to phono lead and use one of the phono jacks to plug into the speakers (the left one I think). It'll leave you with a plug floating about at the back, but shouldn't worry you too much.
     

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