Pioneer CLD-D704 Laserdisc player, Do I need a Demod for DD, AC-3?

Discussion in 'Archived Threads 2001-2004' started by todbnla, Nov 22, 2002.

  1. todbnla

    todbnla Screenwriter

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    I have a chance to buy a Pioneer CLD D704 Player. If I do so do I still need a Demodulator to play discs with DD 5.1, AC-3 sound? Yes or No?


    PLMK-Thanks
     
  2. greg_t

    greg_t Screenwriter

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    Yes, you will need a demodulator. You will connect the AC3 out on the LD player to the demodulator, and then go from the demod to your reciever by a digital cable.
     
  3. Wilson W

    Wilson W Agent

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    No, 704 has a digital output.

    In fact, I was just using that a moment ago. Older model, however, may need one.
     
  4. greg_t

    greg_t Screenwriter

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    Wilson,

    LD dolby digital (AC3) cannot be passed through the digital output. Dolby digital on LD is stored on the right analog track and is stored in RF form. On the back of the 704 there is a specific output for AC3. The output is in RF form, and must be passed through a demodulator for conversion to digital. The digital output on the LD cannot be used to pass RF AC3. The digital output can be used for DTS and PCM and can go directly into a digital input on the reciever.
     
  5. Wilson W

    Wilson W Agent

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    ah, I forgot my receiver has an AC-3 input.

    thanks for the correction
     
  6. todbnla

    todbnla Screenwriter

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    Ok, gents, thanks!
     
  7. There are 3 outputs on the back of the CLD-D704. There is an RF-Digital coax (this is your DD AC-3) this connects to a modulator to get DD 5.1. Then there is a coax and an optical digital out which passes either PCM Stereo, Dolby Pro Logic, or DTS depending on the disc.
     
  8. Grant B

    Grant B Producer

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    Dont forget Mr Analog!
    The occasional old disc without Digital, (I found that out on Back to the Future a while back)and the occasional Directors commentary on an analog channel.
     
  9. IraSWeiss

    IraSWeiss Stunt Coordinator

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    It's really unfortunate that on their DVD/LD players Pioneer did not demodulate the Laserdisc RF signal and send it to the optical and coaxial outputs. Who needs two wires?
     
  10. Philip Hamm

    Philip Hamm Lead Actor

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    Todd,

    In case you're confused....

    You will need a demodulator to listen to Dolby Digital AC-3 tracks only.

    All Dolby Digital LaserDiscs will also have a PCM stereo track that you will be able to use through eithher the analog or digital output. This will be derived for ProLogic and will sound great.

    If you don't have a lot of AC-3 discs I would suggest not bothering with a demodulator. The PCM sound will not dissapoint you.
     
  11. Michael Reuben

    Michael Reuben Studio Mogul

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  12. Rachael B

    Rachael B Producer

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    Demodulating in an LD player is impractical because it would be difficult to shield the other parts from the RF field. The only LD player ever with onboard RF deodulation was the MSB Silver and it's demodulator was mounted in a little box on the back panel.
     

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