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Welcome to the Allo audio club (sponsored)

  1. What's new in this club
  2. thread

    Allo Sparky USBridge

    Why does the USBridge system offer it as an option with the J28 jumper etc? My understanding is that by separating the power supplies, you can further reduce noise on the USB output. To update, I spent some time listening to the USBridge with my Hugo2 last night. The main board being powered with the stock PSU and included micro USB adapter, and the USBridge powered with my LPS-1.2. Alex at UpTone told me he knew of a handful of folks powering the USBridge this way, so I felt more comfortable trying it out. Now I need to figure out a good way to switch everything off when not in use. How do people do this? Even if I put everything on a power strip to easily turn it off at once, how do you guys do a proper shut-down of the Sparky? I know there's a risk of corrupting the system drive if we don't do a safe unmount (shutdown of the linux system)... And I'd still like to understand what my risks are here that luisma was talking about... Alex mentioned that the LPS-1.2 has safety features, "you can’t hut an UltraCap LPS-1.2 by trying to draw too much current from it. It will simply go into over-current mode, flashing red 5 times then once green (checking to see if load lowered), then red 5 times, etc."
  3. thread

    Allo Sparky USBridge

    This is not supported. The USBridge is designed for Sparky, Allo's single board computer, which is similar to the Pi but different.
  4. gahabana

    Allo Sparky USBridge

    has anyone tried to run USBridge on Raspbery PI ? thank you
  5. phalanger

    VOLT+D class D amp , dual mono 2x 60W

    I'm considering getting one of those but doubting a bit between this one and the Volt+ with stepped attenuator, not sure if I really need the extra power. Does this one sound noticably different than the regular volt+? Also I noticed Allo and its distributors only offer the 19v 3.2A powersupply with this amp, but that is a 60W smps which will not really power the amp to 2x60w, not even half that. So unless I would find a much beafier powersupply to go with it, it would not get much more power than the volt+ when using the same powersupply, it seems. Despite that, I still mildly lean towards the Volt+D due to the better components, but I do wonder how different they are, and how to actually get 2x60w out of it.
  6. vortecjr

    Sparky Dietpi Roon-Ready I2S Streamer

    No...implementation matters and power supply matters:)
  7. tapatrick

    Sparky Dietpi Roon-Ready I2S Streamer

    Cheers I will check it out. This is a USB input device; so you are saying whether its a USB or ethernet input should make no difference?
  8. vortecjr

    Sparky Dietpi Roon-Ready I2S Streamer

    I'm overseas. Maybe Martin from https://www.vortexbox.co.uk can loan you a Sonore ultraDigital to try.
  9. tapatrick

    Sparky Dietpi Roon-Ready I2S Streamer

    Hi @vortecjr, I'm in London (UK). What did you have in mind? Thanks a lot.
  10. Em2016

    Allo Sparky USBridge

    I have J28 removed and only power the USBridge board's 5.5 x 2.5mm DC input... the Sparky board is powered via a diode if I remember correctly. A USB3.0 port (0.9A) is fine for me, so the LPS-1 at 1.1A should have no issues. Any reason why you need to power the Sparky and USBridge boards separately? The diode ensure current flows only one way...
  11. vortecjr

    Sparky Dietpi Roon-Ready I2S Streamer

    There is no conversion to USB and then back to i2s. It’s either i2s at the output of the CPU (aweful) or at the XMOS processor (much better). It’s one or the other, but it’s i2s just the same. They say the inputs are immune, but many say different. They also admit that different cables sound different. Ask Ted which oscillator he uses for the DAC and the USB input. I would be willing to lend you something to try depending on where you are located?
  12. vortecjr

    Sparky Dietpi Roon-Ready I2S Streamer

    That is just data transferring from one place to another.
  13. tapatrick

    Sparky Dietpi Roon-Ready I2S Streamer

    I was referring to the extra conversion to USB then back to I2S that some people are making but I take your point. I understand the PS audio DAC ignores the clock input which I discussed and thought about before launching into this project and also read that PS Audio DS DACs are supposedly indifferent to inputs, however this particular chain for whatever reason, and including the limitations you have pointed out, sounds fabulous, my best input device yet and much better than straight USB in. Having spend several researching then getting it to work is added satisfaction. If you are saying a master clock into the Sparky would improve jitter then I am curious about how this can be bettered. Do you have any suggestions? "Finally, the PS Audio Junior DAC will ignore your master clocks and ultimately use its own internal master clock and that is likely the clock you want to upgrade;) " I did ask Ted Smith about this and he said he has used and implemented the best ultra low noise clock he could find at the time in the Junior DAC. Also on another curve, I just received a cheap SD card player from China with I2S out which I heard about on TirNaHifi and am surprised and a bit shocked to hear how good this is sounding into my Junior DAC without any tweaks yet...
  14. thread

    Allo Sparky USBridge

    Is anyone else running the USBridge with the LPS-1.2? I'd love to hear from anyone about this pairing... particularly if it will work without putting any electronics at risk. Has anyone tried the ISORegen with the USBridge? Is this device likely to improve the sound, or does the fanciness that is the USBridge basically render any benefit that the ISORegen would bring moot?
  15. rruffin

    DigiOne Player Issues with Yggdrasil?

    Have you solved this problem, yet?
  16. rahul_kc

    Pi3 + Kali + Piano 2.0 - Under Voltage Messages

    with Recent RPI kernel versions the low voltage warnngs messages displays frequent intervals on terminal. As per Raspberri pi forums, instantanious voltage level to 4.63+/-0.07 shows this messages. On Multi Meter measurement always shows above 4.9V (Meter shows average voltage). Other than the warning messages not observed functional issues with Allo 5V adaptor.
  17. shadowlight

    Sparky Dietpi Roon-Ready I2S Streamer

    For USB isn't the conversion done 2 times: Ethernet --> USB --> i2s? This is assuming that your DAC is connected to something along the lines of Signalyst NAA (which is the case for me?)
  18. shadowlight

    Sparky Dietpi Roon-Ready I2S Streamer

    Thank you. That gives me a good starting point.
  19. vortecjr

    Sparky Dietpi Roon-Ready I2S Streamer

    The number of conversions from Ethernet to i2s and USB to i2s are exactly the same. 1 conversion each. If you compare the jitter from the Arm processor’s i2s signal (especially the way you are doing it without sending it a proper master clock based on the audio rate) and the jitter form a well implemented XMOS processor’s i2s signal the XMOS processor’s i2s ouput will be lower jitter every time. So why start out with a higher jitter source. Also, buffering the signal and reclocking is exactly what is taking place in your PS Audio Junior DAC so doing it twice hardly seems like avoiding extra steps. Finally, the PS Audio Junior DAC will ignore your master clocks and ultimately use its own internal master clock and that is likely the clock you want to upgrade;)
  20. tapatrick

    Sparky Dietpi Roon-Ready I2S Streamer

    Hi @shadowlight yes, I only have a couple of DSD test files and they work without any glitches. My hardware has a limit of DSD64 but Ian’s boards can handle up to DSD512 and multichannel automatically detected. Correct, I dont use USB as I didn’t want an extra conversion, just straight I2S from Sparky into my PS Audio Junior DAC.
  21. shadowlight

    Sparky Dietpi Roon-Ready I2S Streamer

    @tapatrick have you tested DSD with your setup? If yes, any pop's during startup? Based on the information and the pictures there is no USB connection in the chain, correct? I am looking to do something similar, initially with Kali and RPi so doing as much research as I can so I can get all the parts ready.
  22. The Computer Audiophile

    Pi3 + Kali + Piano 2.0 - Under Voltage Messages

    Paging @Allo
  23. shadowlight

    Pi3 + Kali + Piano 2.0 - Under Voltage Messages

    @rahul_kc any idea on why I am getting the under voltage messages with the Allo 5v/3A power supply?
  24. Sergejj2005

    Allo Sparky USBridge

    and 3. Usbridge+Sparky SBC+Kali (i2s Reclocker)+Piano 2.1 DAC+Relay Attenuator
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