This can happen due to upsampling exceeding the dynamicange of the format. Use Roons headroom settings to reduce by ~2db.
Baffled and Frustrated: Streaming/DAC Sound Issues
Hoping to find some guidance here regarding a significant noise issue. Running Quboz through Roon. Relevant Gear is an Auralic Aries G2.1 > Morrow USB cable >Aavik D280 DAC > Wywires Platinum RCA >Anthem STR.
Previously had some issues with the Aries but that’s hammered out and sounding great. Now, when running many songs through the DAC, I’m hearing terrible “crunching” distortion. There’s very little consistency in the problem (loud Pink Floyd sounds great, loud Motley Crue sounds like garbage) except most hard rock/metal, which i started putting on per Morrow Audio’s recommendation for burning in their USB cable, is always terrible. Volume is irrelevant, I’m getting the noise at sub-30db. The 4 DAC settings: upsampling/ non upsampling/fast/slow don’t change anything. USB cable isn’t likely the problem, it sounds great from streamer to amp without the DAC. I’m running out of settings to change around. Anyone have an educated guess or experience with either the output settings from the Aries or D280 setup that can provide any guidance? Dealer wasn’t very helpful.
Thanks much,
Peter
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- 41 posts total
That is not at all how digital audio works. There’s "no solution in sight" because the analog signal is not broken up "into billions of tiny fragments." The basis of digital audio is the Fourier Transform. The theorem that makes digital audio work is the same math that describes how analog audio works. Believe it or not. Here’s a video that actually demonstrates this.
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@clearthinker 👍 good deal |
@cleeds when I read that post I knew that is the battle not worth fighting. |
Wikepedia: A Fourier transform (FT) is a mathematical transform that decomposes functions into frequency components, which are represented by the output of the transform as a function of frequency. Most commonly functions of time or space are transformed, which will output a function depending on temporal frequency or spatial frequency respectively. That process is also called analysis. An example application would be decomposing the waveform of a musical chord into terms of the intensity of its constituent pitches. The term Fourier transform refers to both the frequency domain representation and the mathematical operation that associates the frequency domain representation to a function of space or time. You can read above that the Fourier Transform decomposes the signal. The example given is the decomposition of the waveform of a musical chord. That is exactly what I said. In analogue audio, the waveform is not decomposed. Clock error in a DA converter is the timing error in recomposing the analogue waveform from the decomposed waveform for expression by an analogue music system. I am given to believe that it is impossible to remove clock error entirely. Hence my comment that the pieces cannot be put together again correctly. All the cheap oscilloscopes in the world cannot change this. Nor is their definition fine enough to reproduce the results of clock error.
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- 41 posts total