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  1. #11
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    Quote Originally Posted by MikeSlim View Post
    Sorry, it's only for the Allo Sparky Board.
    In order to get Allo Sparky and Usbridge running, similar steps as with the Rpi are necessary.

    Download Dietpi as operating system, install it on SD card and make some settings as described in the link.

    https://dietpi.com/#noAction
    https://dietpi.com/phpbb/viewtopic.php?f=8&t=9#p9

    By the way, I already had several Rpi, but never white noise.
    Maybe something seems to be broken or incompatible.

    Greetings

    Mike
    Thanks for this!

    It looks like SqueezeLight can be installed on sparky, however, all command line based, which might be fine but I am a bit afraid of a weekend lost in trial and error... Anyway, I wait for my passive preamp first, that might at least solve the noise problem. I believe that the noise is probably dificult to solve totally given that the USB port has no galvanic isolation at all. However, the fact, that it is so notable in my setup must be due to the particularly high amplification through the 103db-speakers and the powerful amps. So attentuating all the sound linearly (not only the music, but music and noise togehter) will already help with no doupt.

    I see then whether I give the Sparky with the Usbridge a try.

    Cheers! Urs

  2. #12
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    I have experienced pink noise with a set up.

    I have a NorthStar Essensio dac which works faultlessly with Optical or Co-ax inputs.

    The Linux usb driver is completely pants.

    I have tried it with raspberry pi, and Raspbian Desktop on a PC.

    The Windows and Mac OS drivers are hardly any better

    It plays fine (using the usb input) then when I select another station to stream I get a blast of white noise.

    Quickly stopping and starting the player suceeds in faultless playback, until it just peters away into choppy distortion and silence or I change the station again.

    I think it's deffo the driver, as I have tried tweaking the Squeezelite setting to no avail.

    Other dacs don't have the problem at all.

    Not all linux drivers are equal and not all guaranteed to work on a pi

    edit : got me noise colours mixed up
    Last edited by Man in a van; 2019-03-24 at 07:10.

  3. #13
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    Quote Originally Posted by Man in a van View Post
    @diego

    Some ideas:

    What you could try, is a different OS in the pi, either MoOde Audio or Volumio.

    Or install Raspbian Lite with Squeezelite (and LMS, if needed).

    Is the dac a pre-built model or did you put it together yourself?

    ronnie


    Nice system by the way (it's a bit old skool, in a good way ).
    Thanks, indeed I will try this. Anyway, I wait for my passive preamp first, I believe this will at least greatly reduce the issue. However, these OS might be a nice try anyway, maybe whe I find a moment I will just give them a try anway.

    The Soekris-DAC1101 is pre-built. It's a very nice multibit-dac, all built with resistors, no chips involved, and it sounds fantastic in differents setups I have tried, in particular for it's size and prize. Only disadvantage: There is no separate power input, power comes only through USB. And that might be the issue right now. However, I have box that takes power from a linear psu and puts it together with the usb signal, so in theory the noisy power from the RPi should not get through to the DAC. So I can't explain that noise issue totally...

    And yeah, thanks, the system is old school indeed. The amps are a bit outdated and oversized for the speakers and I might think about replacing them. Not the speakres. I have searched many times but never found anything that gets close to Rehdeko according to my taste, not even if rediculously expensive

  4. #14
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    Quote Originally Posted by Man in a van View Post
    Not all linux drivers are equal and not all guaranteed to work on a pi
    Thanks for this! I feel less alone with my issue. Maybe indeed a driver issue then. Although the DAC is said to be fully and natively compatible and tested with newer Linux distributions.

  5. #15
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  6. #16
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    Quote Originally Posted by diego View Post
    However, this setup allows me for now to detect this noise issue and I hope to eliminate it, too.
    You could check if the noise is due to the USB GND & 5V power lines from either device by either cutting the GND and 5V wires in a USB cable or just putting thin slivers of paper in the USB socket at the outermost edges where the GND and 5V pins are.

    The USB signal are differential and since both devices are self powered - no USB power should not affect USB operation.

  7. #17
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    Quote Originally Posted by Man in a van View Post
    Yeah. Amps are still nice, hopefully even nicer. They used to be a bargain compared to the similarly sounding competition. A couple of years ago they put some digital gimmick on the preamp (that is probably outdated on todayĺs standards I guess), and this was their justification to board to a space rocket into another sphere of prices... http://www.austinhifi.com/crimson.html - no idea if they are really worth it.

  8. #18
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    Quote Originally Posted by bpa View Post
    You could check if the noise is due to the USB GND & 5V power lines from either device by either cutting the GND and 5V wires in a USB cable or just putting thin slivers of paper in the USB socket at the outermost edges where the GND and 5V pins are.

    The USB signal are differential and since both devices are self powered - no USB power should not affect USB operation.
    Interesting, I'll try that. However, I need usb power for my DAC. And I have a splitter that connects to a linear psu and should bring only that clean power over USB to the DAC. What makes me doupt is, that the noise is there only when squeezelite is running and the DAC-setting in Squeezelite is correctly configured. Which might indicate that the problem lies in the signal, not in the power (that is probably constantly on the SBi USB outputs)

    However, I ordered a Sparky Usbridge, after reading this: https://darko.audio/2018/02/step-up-...tals-usbridge/ It looks like it comes preconfigured with Squeezelite, too, so it should be no hassle... and if it is as good as described, it is worth it.

  9. #19
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    For something fancier, check out the PecanPi:

    https://www.audiosciencereview.com/f...streamer.6952/

  10. #20
    Senior Member Apesbrain's Avatar
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