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  1. #1
    Senior Member sdiesel77's Avatar
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    Rpi4 + PCP which output to choose

    Hi
    I'm looking at upgrading my current setup (Rpi3+Digione with Picoreplayer).
    I use a Holo Print v2 DAC that has multiple inputs (coax, USB, i2S).

    I am confused in terms of which digital card to choose.
    I'll go with a Rpi4+PCP but which card/output will deliver the best audio quality?

    It seems that the coax is limiting the DSD quality.

    Thx

  2. #2
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    Quote Originally Posted by sdiesel77 View Post
    Hi
    I'm looking at upgrading my current setup (Rpi3+Digione with Picoreplayer).
    I use a Holo Print v2 DAC that has multiple inputs (coax, USB, i2S).

    I am confused in terms of which digital card to choose.
    I'll go with a Rpi4+PCP but which card/output will deliver the best audio quality?

    It seems that the coax is limiting the DSD quality.

    Thx
    No need for a card. Use the USB
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  3. #3
    Senior Member sdiesel77's Avatar
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    Apparently the Rpi USB isn't the best for audio, in this case the Allo Usb Bridge signature could be an option.
    But I'm wondering if i2S would be better?

  4. #4
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    Quote Originally Posted by sdiesel77 View Post
    Apparently the Rpi USB isn't the best for audio, in this case the Allo Usb Bridge signature could be an option.
    But I'm wondering if i2S would be better?
    Have you tried the Pi USB? It sounds fine to me.

    Edit. I have seen reviews that say the USB input of the Holo Audio Spring DAC isn't great but it is still worth trying.
    Sent from my Pixel 3a using Tapatalk
    Last edited by slartibartfast; 2021-04-13 at 12:48.

  5. #5
    Senior Member sdiesel77's Avatar
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    Didn't see these reviews but I'll check

  6. #6
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    Quote Originally Posted by sdiesel77 View Post
    Didn't see these reviews but I'll check
    If you have a USB cable just try it. You might be surprised.

    Sent from my Pixel 3a using Tapatalk

  7. #7
    Senior Member paul-'s Avatar
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    A digi hat which is connected to the RPI I2S line will for sure limit your ability to do native DSD. I would not be concerned with USB on a pi4. Some devices do not like the USB3 ports of the pi4, but there are 2 USB2 ports too.
    Last edited by paul-; 2021-04-13 at 13:33.
    piCorePlayer a small player for the Raspberry Pi in RAM.
    Homepage: https://www.picoreplayer.org

    Please donate if you like the piCorePlayer

  8. #8
    Senior Member Greg Erskine's Avatar
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    I was a USB disbeliever, but I recently bought a USB DAC for testing pCP, changed my mind. I have only tested it on RPi4B, RPi400 and RPi1B. Sounds OK on all these to me. The RPi1B wasn't suitable for upsampling.

    Don't believe out of hand what you read, especially if you can test it yourself.

    Does your USB DAC work on your RPi3B+?

  9. #9
    Senior Member sdiesel77's Avatar
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    Quote Originally Posted by paul- View Post
    A digi hat which is connected to the RPI I2S line will for sure limit your ability to do native DSD. I would not be concerned with USB on a pi4. Some devices do not like the USB3 ports of the pi4, but there are 2 USB2 ports too.
    So, I wouldn't need an Allo USB Bridge signature to improve sound quality?

  10. #10
    Senior Member sdiesel77's Avatar
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    Quote Originally Posted by Greg Erskine View Post
    Does your USB DAC work on your RPi3B+?
    I don't know, I never tried, I always used the spdif coax from the Digione.
    I don't even know how to set it up in PCP

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