+ Reply to Thread
Page 1 of 2 12 LastLast
Results 1 to 10 of 11

Thread: R-Pi 4 with stand-alone Dac

  1. #1
    Join Date: Apr 2012

    Location: Near Oxford

    Posts: 921
    I'm Bill.

    Default R-Pi 4 with stand-alone Dac

    I keep being tempted by a standalone Dac, has anyone tried a R-Pi 4 straight into a Dac via USB without a Digi hat? Wondering if the fact that the USB/Lan issue has been revised that the digi hat is no longer required.
    Last edited by Bourneendboy; 23-08-2019 at 07:03.
    Allo Boss Player / NJC Audio Reference Headphone Amp / Sennheiser HD600

  2. #2
    Join Date: Jun 2015

    Location: London/Durham

    Posts: 3,075
    I'm Lawrence.

    Default

    I don't know anything about these issues but my RPi 3 b+ works fine into a USB dac without a hat, as long as the dac is not using the usb for power.

    Sent from my POT-LX1 using Tapatalk

  3. #3
    Join Date: Apr 2012

    Location: Near Oxford

    Posts: 921
    I'm Bill.

    Default

    Quote Originally Posted by Lawrence001 View Post
    I don't know anything about these issues but my RPi 3 b+ works fine into a USB dac without a hat, as long as the dac is not using the usb for power.

    Sent from my POT-LX1 using Tapatalk
    Cheers Lawrence

    I am aware it is possible and did do this for a short time in between systems with a Dragonfly Red. What I'm interested in is any sq comprises from not using a hat.
    Are you suggesting there aren't any if not powering the Dac?

    The Dac in mind is an NJC Audio Reference Dac to go with their headphone amp I currently use. This is mains powered.
    Allo Boss Player / NJC Audio Reference Headphone Amp / Sennheiser HD600

  4. #4
    Join Date: Jan 2019

    Location: Liverpool

    Posts: 87
    I'm Andrew.

    Default

    I use an RPi 3 in to a usb to SPDIF convertor via the USB out and this sounds fine . However if you want to use the RPi direct in to a USB DAC as you indicate then I would recommend that ypu look to get the new RPi4 which is out now.

    This unit is much quicker and has a great deal more RAM the previous RPi boards and more important it has full USB 3.0 outputs that will match and feed in to a stand alone DAC much easier . I feel (as I have not yet tried this ) that this will also have a less compromised sound quality output as the USB has its own power feed from the board .

  5. #5
    Join Date: Jun 2015

    Location: London/Durham

    Posts: 3,075
    I'm Lawrence.

    Default

    I'm a bit out of my depth here technically add I'm not familiar with the strengths and weaknesses of the the Rpi other than power supplies. But I'll stick my neck out and say the following:

    I should have clarified my statement about USB DACs with regards to compatibility. I've tried about 6 DACs and external SPDIF convertors, and one of them wasn't compatible. (It was recognised but no sound came out.) This may sometimes be a function of the software you are using eg. I use Squeeelite. Most are plug and play with Linux but in my case I looked it up and apparently I need to add a command line in the "Kernel" or something which I will get round to one day if I can work it out. (So it's a fundamental Linux set up issue, not the music software)

    Regarding SQ I'm not sure that a Hat spdif converter is necessarily any better than an external one (either built in to the DAC or a separate box). If it's drawing the power from the Pi then it will have issues around that, but on the other hand it may use the I2S link which apparently is better, though I've heard some don't find that in practice. Probably, a better stand alone mains powered spdif converter will outperform a built in piggy back one regardless of connection YMMV.

    Going direct to a USB dac, again assuming mains powered, much is dependent on the built in USB convertor, older ones (say 5+ years) tend to be outperformed by relatively cheap separate ones these days as the technology has moved on (moreso than dac chips where opinion is still rather polarised, I tend to veer towards the older less clinical sound but only in the best implementations eg Trichord, Pink Triangle, but newer NOS DACs can come close eg Chevron, Metrum).

    Sent from my POT-LX1 using Tapatalk

  6. #6
    Join Date: Apr 2012

    Location: Near Oxford

    Posts: 921
    I'm Bill.

    Default

    Thanks for your comments fellas.

    I'm only interested in the NJC Dac if I'm going to do this, but unfortunately a trial/demo is not possible - I have asked them.

    More pondering required
    Allo Boss Player / NJC Audio Reference Headphone Amp / Sennheiser HD600

  7. #7
    Join Date: Jun 2015

    Location: London/Durham

    Posts: 3,075
    I'm Lawrence.

    Default

    I would check the spec of the latest version as I found this in an online review, but it was from 2016 and might be an old spec. It implies the USB convertor is one of the old chips I referred to that are outclassed these days. Hopefully the MK2 version is higher on USB.

    "Full spec is on NJC's website - but this is a back to basics simple design so limited inputs (Coax (24/192), Optical (24/96), USB (16/48) and one analogue).* The USB is not asynchronous (NJC audio's view is that whilst asynchronous is a cost effective way of reducing jitter its own jitter attenuation methods are equally effective and have other advantages.) and the USB won't support High Def.*"

    Sent from my POT-LX1 using Tapatalk

  8. #8
    Join Date: Apr 2012

    Location: Near Oxford

    Posts: 921
    I'm Bill.

    Default

    Quote Originally Posted by Lawrence001 View Post
    I would check the spec of the latest version as I found this in an online review, but it was from 2016 and might be an old spec. It implies the USB convertor is one of the old chips I referred to that are outclassed these days. Hopefully the MK2 version is higher on USB.

    "Full spec is on NJC's website - but this is a back to basics simple design so limited inputs (Coax (24/192), Optical (24/96), USB (16/48) and one analogue).* The USB is not asynchronous (NJC audio's view is that whilst asynchronous is a cost effective way of reducing jitter its own jitter attenuation methods are equally effective and have other advantages.) and the USB won't support High Def.*"

    Sent from my POT-LX1 using Tapatalk
    Thanks for pointing that out, I hadn't spotted it.

    I know I'm best to stick with what I have, save the money and not have the hassle of selling my existing stuff, its my obsession kicking in.......
    Allo Boss Player / NJC Audio Reference Headphone Amp / Sennheiser HD600

  9. #9
    Join Date: Feb 2013

    Location: W Lothian

    Posts: 58,495
    I'm Grant.

    Default

    Inclined to think although changes may seem good initially they usually level out as your hearing adapts.... Get something you like and stay with it is my advice, or you'll never be happy..... unless you enjoy it of course
    Regards,
    Grant .... ؠ

    I've said it before and I'll say it again: democracy simply-doesn't-work
    .... ..... ...... ...... ................... ..... ..... ..... ..... .....
    OPPO BDP-103D DARBEE - JBE SERIES 3/B&O SP1/PROJECT PHONOBOX DS2 USB - QUAD VENA 2 - IFI PURIFIER 2/TWIN PRO MONOBLOCK POWER AMPLIFIERS - LEAF HD BLUETOOTH - OPPO PM-3 PLANAR, SONY H900 & NURAPHONE HEADPHONES - ZBOOK/ IFI SILENCER/WIN10 PRO/AUDIRVANA 3 PLUS/TIDAL - SMSL M6 DAC & IFI SILENCER - RPI 3+, DIGIONE HAT/VOLUMIO2 - FULL RANGE TWIN TELEFUNKEN SPEAKERS - CABLE INC CHORD, MOGAMI, SUPRA & WIREWORLD

    **Men are not punished for their sins, but by them**
    ***SMILE, BE HAPPY***

  10. #10
    Join Date: Apr 2012

    Location: Near Oxford

    Posts: 921
    I'm Bill.

    Default

    Quote Originally Posted by struth View Post
    Inclined to think although changes may seem good initially they usually level out as your hearing adapts.... Get something you like and stay with it is my advice, or you'll never be happy..... unless you enjoy it of course
    I know you are right Grant, wise words!
    Allo Boss Player / NJC Audio Reference Headphone Amp / Sennheiser HD600

+ Reply to Thread
Page 1 of 2 12 LastLast



 

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •