Other Gear > Digital
Raspberry Pi?
Natural Sound:
--- Quote from: Deke609 on October 21, 2020, 03:33:51 AM ---I use the Shanti as well. It powers my Allo USBridge Sig that sits between my Roon Core (Intel NUC) and my DAC. Before getting the USBridge Sig, I was using the original USBridge (non-Sig) powered by a more expensive linear power supply made by Uptone Audio. I needed a new power supply b/c the Sig required more current than the Uptone Audio could put out. Result: to my ears the the combo of Sig and Shanti was a little cleaner in the highs than the previous set up, and cost less.
I'm pretty impressed with the value proposition of Allo.
cheers, Derek
--- End quote ---
I'm going to pick up a DigiOne Signature and another Shanti as soon as the U.S. distributor gets his shipment. This will feed the Bottlehead DAC in my main system. The BOSS / Shanti combo is being used in my home office.
I agree, Allo is an exceptional value.
kgoss:
--- Quote ---Come again, what are you trying to say? You can't possibly be serious.
--- End quote ---
OK, I will try to explain. But I am not going to hijack this thread which is about the Raspberry Pi.
To keep things as simple as possible lets talk about a single bit moving from a hard drive to memory. First of all, the digital domain is a binary world. The bit is either on or off (1 or 0) absolutely, there is no state other than those two. Let's say the bit is a 1 on the hard drive. When it is read from the hard drive it begins a long journey through the CPU to be written into memory. Along the way there is lots of error correction done to ensure the value stays a 1. If an error is detected and cannot be corrected along the way, the value is thrown away and the read from hard drive is done again. The end result is that the bit (value=1) is written into memory. The only thing that matters is the value of that bit in memory is 1. Time is not a factor in this outcome because time is irreverent in the digital domain. The correct value is written to memory no matter if it takes 1 microsecond or 1000 milliseconds. Slow computers drive us crazy, but in the end they always have the correct value. If that was not true computers would be useless, and we all know even a slow computer is better than no computer.
On the analogue side of a DAC time is extremely critical. The DAC chip relies on a constant stream of zeros and ones over a time period (sample rate) to construct as close an approximation of the smooth analogue signal as it can given the sample rate. If there are breaks in that data stream for any reason data is lost and if enough data is lost you will hear it. There is no data correction in analogue like there is in the digital computer. Data lost is lost forever. So power supply noise, RF interference, power supply fluctuations all affect this analogue world and will affect the quality of the music you hear.
In my opinion, that is the reason PB always asks headphone amp users with noise problems if they have a USB powered DAC. Then the question is can the DAC be powered externally and could they switch to an optical connection. The optical connection means no power to the DAC is coming from the noisy computer, and that solves the problem a lot of the time. Very long story short, I believe powering a DAC separately from a computer is always the best solution,
grufti:
Your "explanation" documents that you really don't understand timing in digital circuits. Please explain to yourself why a computer will crash eventually when overclocked. Don't do it here because it will indeed hijack the thread, but realize that I have designed high speed digital circuits in my life, timing is everything because you are still dealing with the same physics. Also, no, error correction in digital systems is not always 100% successful.
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