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davide256

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About davide256

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    Empirical Audiophile

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    Virginia

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  1. Think of the 2db as an average... of greater transient peaks. Like increasing the contrast on your video monitor.
  2. Clocking accuracy matters. Clocking degradation damages harmonic structure integrity and dynamics. You could also try the Lush 2 cable if you want a real treat, its Faraday cage like shielding mechanism works for improving USB audio. But you may be happy with the AQ Diamond you have 😁
  3. davide256

    AudioLinux and NUC Troubleshooting and Tuning

    Ok, I'm finally at the point where I can accept the NUC7PJYH as better than RPI3b+. I can't say if any individual change made the difference, I more or less took all the recommendations (tried/untried) in this thread and used them. I also was not happy with the sound of the stock LPS 1.2 setup at 12V powering the NUC, had better results with the options below. latest AL headless (0.6) in RAM/extreme mode initrd=\intel-ucode.img initrd=\initramfs-linux-rt-bfq.img root=PARTUUID=166ad16d-098d-4453-ab07-7c5255b4d451 rw quiet intel_pstate=enable efi=runtime audit=0 Boot secure boot disabled Linux OS Devices USB Configuration - Portable Device Charging Mode - OFF Chipset SATA Controller Configuration - SATA Port - UNCHECKED Onboard Device Configuration - Audio - UNCHECKED Onboard Device Configuration - HD-Audio DSP - DISABLED Onboard Device Configuration - Digital Microphone - DISABLED Onboard Device Configuration - WLAN - UNCHECKED Onboard Device Configuration - Bluetooth - UNCHECKED Legacy Device Configuration - Enhanced Consumer IR - UNCHECKED Primary Power Settings - Enhanced Intel Speedstep Technology - UNCHECKED Intel Virtualization options disabled NUC powered by LPS1.2 at 12V using HDplex 19v as energizer or by SPS-500 at 12V With this setup I no longer experience mid range suck out and the high frequency graininess of RPI3b+ is eliminated
  4. davide256

    Raspberry Pi 3B+; anyone using it yet?

    Can't test that since my DAC is PCM only, using DSD to PCM conversion. No issues playing 192/24 resolution if overclocking config is used. Finally got a Pentium NUC tweaked to sound right as AL headless endpoint last night, it adds smoother high frequencies, probably the better route to go if you want native DSD. But for $70 vs $270 (AL cost included), the RPI3b+ with AL is quite a bargain.
  5. davide256

    Raspberry Pi 3B+; anyone using it yet?

    In the FWIW column, my RPI3b+ is back in service as Roon asynch USB endpoint, running the 32 bit version of Audiolinux with overclocking enabled. Heartily recommended, better than any of the other options I've played around with. Note that while a 64 bit AL version is also available it has no overclocking config, stuttered playing higher than CD resolution without an overclocking config.
  6. Sometimes businesses become too invested in what they make, stop listening to their customers. I think the mR is great hardware... hobbled by an OS. I've pulled mine from re-sale in hopes that some path to improve the OS results.
  7. davide256

    AudioLinux and NUC Troubleshooting and Tuning

    Think of this possibly as an exercise in thermodynamics? Where the goal is to reduce heat noise/ electrical activity during processing of audio data? I continue to wonder how an audio renderer would sound supercooled... BTW, does Roon have any way you found to increase player/renderer track buffer used?
  8. davide256

    AudioLinux and NUC Troubleshooting and Tuning

    Older 100 watt model https://www.hdplex.com/blog/tag/hdplex-100w-linear-power-supply/
  9. davide256

    AudioLinux and NUC Troubleshooting and Tuning

    You can get an m.2 slot in a NUC7I3BNH. But I'm guessing that the need is for a board without case to allow access to an add on USB card. Any thoughts for what that package would be (case,USB card, riser above, board)? I find the JCAT attractive because I could power the USB port with existing LPS 1.2 and because there is an attempt at quality engineering.
  10. davide256

    AudioLinux and NUC Troubleshooting and Tuning

    Good power supplies behave much like the glass used for a telescope lens... the better the glass, the higher the performance that can be gotten out of the end product. Brightness is an excitation behavior of the electronics used... its unique to the gears strength ,weaknesses and interaction with power supply design. The measure I use for PS quality is resolution, tone color intensity, black space for background, I treat anything else as equipment unique interaction. Did not observe much difference between HDPlex 19v vs LPS1.2 12V powering NUC7PJYH connected to DDC, but when using an ISO Regen between NUC and DDC with 5v USB replace enabled, the difference between PS used for ISO Regen is glaring.
  11. davide256

    AudioLinux and NUC Troubleshooting and Tuning

    I'm using the 32 bit version with the overclock settings enabled in the configuration file...still hoping that someone comes forward with a way to overclock with 64 bit version. May consider something like a fanless PC that can use a JCAT Femto/LPS1.2 for next endpoint, don't think AL magically fixes USB HW quality limitations. I do believe ISO Regen is a compromise, should be unneeded if USB is done right in machine and adds another whisper chain component for distortion.
  12. davide256

    AudioLinux and NUC Troubleshooting and Tuning

    I've reached the end of my playing around with NUC7PJYH as endpoint . The way to resolve the issues with it was to use ISO Regen/LPS 1.2 at which point no more glare or mid range suck out. Using ISO Regen/LPS 1.2 with RPI3 remained better than NUC7PJYH.
  13. davide256

    AudioLinux and NUC Troubleshooting and Tuning

    I have both SPS500 and LPS 1.2. The SPS500 is a beast for quality current but it can't compete with LPS 1.2 device resolution when powering sensitive source electronics.
  14. Can you elaborate on this? Glare is what is driving me not to use Pentium NUC as AL endpoint... Magnepans seem to magnify glare
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