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AV Hardware:Audio

Discussion in 'Hi-Fi Stereo Systems & Separates' started by G.Blunden, Jul 2, 2003.

  1. G.Blunden

    G.Blunden
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    Specifications for most modern separate CD players usually include "optical output". What is optical output and how is it used/connected to an amplifier, Do such CD players also have analogue output sockets?

    George.
     
  2. KJ_Palmer

    KJ_Palmer
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    Optical output is one type of digital output which uses light pulses to transmit CD audio data digitally. Some CD players have a coaxial digital output, which uses electrical pulses instead.
    Many modern amplifiers (receivers) accept an optical input from a source, bypassing some of the analogue/digital conversion in the audio path.
    Personally ,my main use for optical output is for recording from CD to Minidisc or CD-R digitally. All the digital output equipped CD players I've come across also have the normal analogue outputs. I can't imagine a CD player that doesn't, but maybe they exist.
     
  3. G.Blunden

    G.Blunden
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    Thank you for your message- very useful information. I assume optical interconnecting leads are made up using small diameter glass-fibre to transmit data between enabled CD player and amplifier.

    Many thanks

    George
     
  4. jhjerpe

    jhjerpe
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    As far as I understand it if you connect a CD player, or DVD player via optical to a AV amp the players DACs will be bypassed and the ones in the AV amp used.
     
  5. Vection

    Vection
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    I think it should be pointed out that a standard stereo amp will not be able to accept an optical input, only AV amps are able to do this.

    the standard setup fo a CD player and stereo amp is:-

    the cdp reads the cd------->
    the info is converted inside the cdp form a digital signal to an analogue electrical one------>
    The electrical signal is passed down normal interconnects to the amp---->
    It's then amplified and sent to the speakers.

    It CAN be different when usind an AV amp ie:-

    The cdp reads the cd---->
    it sends a digital optical signal to the amp---->
    the amp converts the digital signal to and analogue one--->
    then amplifies it ----->
     
  6. avanzato

    avanzato
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    I think with optical connectors it goes like this:

    CD laser reads disc and converts the light to an electric signal ->
    digital electric signal is sent to optical output where it is converted to back to light ->
    light passes down optical cable to amp where it is converted back to an electrical signal -> DAC -> amplification.

    Coaxial cables don't need the extra conversion to light between the player. However optical cables are non conductive (earthing problems) and they don't pick up RF interferance.

    I thought my optical cable would be made of glass fibres but I think they're actually plastic.
     

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