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About barrows

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    High above Boulder

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  1. Umm, I think you are not following me, perhaps I need to be more specific. As to batteries impact not he environment, I was speaking more to the point that batteries require frequent replacement, as their ability to hold a charge degrades over charge/discharge cycles. So one then needs to dispose of them. For electric cars, which can have such a positive impact not he environment (I think the evidence shooed eb pretty clear to most anyone living in a lockdown such as lately, where airborne pollution levels have radically decreased in such a plain way as t be obviously visible) I ma willing to accept that we need batteries. But for powering home audio gear there is no such need. As a good linear supply outperforms batteries anyway, and is more convenient to use.
  2. I have confirmed DSD 256 support via USB on the new Bricasti DACs (directly from Bricasti). Apparently this requires a new input board. Now that it supports DSD 256, I am thinking the M3, via its single bit DSD converter, may be a really fantastic DAC for those who prefer oversampling everything to DSD 256, as I do. It is very nice to see such a high quality DAC, made in the US, at such a reasonable price.
  3. Batteries basically suck. I have experimented with many battery based solutions, both post regulated/filtered and not, and all the battery based systems I have tried have not ever equalled a really good linear power supply (or even a really good SMPS with post filtering/regulation). Batteries are also a PIA, bad for the environment int he long term, and they change their performance (noise, output impedance and voltage) with the level of charge present. While it is possible to make batteries work well, to do so requires so much extra circuitry, that one might as well have just made a really good linear power supply instead.
  4. Both the Topping and the Gustard have active output sections. The Gustard you refer to does not equal the performance of the Topping by its measurements. I have no comment as to whether this indicates either one will sound better than the other, which would be up to the individual listener to determine, but the Topping does measure better... BTW, DACs do not have "preamps" on board. Virtually all DACs (yes, there are some esoteric exceptions) have an active buffer stage at their output to drive the output, but calling such a "preamp" is confusing and not really meaningful. Saying a DAC has a "preamp" onboard makes it seem like it has something extra, which is not present in other DACs.
  5. Yeah, this is why I ma not using HQP, but do not listen to it if you do not want to get a new computer/server capable of running it! I just do not have time/money right now to have a custom server built, but the EC modulator with dSD 256 sounded sooo good! At some point i have to figure out set up for it....
  6. I do not normally run HQP (I do not have a powerful enough machine) so i do not remember my settings really... I stuck mostly with defaults, with EC7 modulator and poly since ext2 filter, I think? The filter is recommended by Jussi. The EC modulators are only possible up to DSD 256, and one needs a very powerful computer to run the, I-9 9900K is basically recommended. If you go into the HQP threads here there is plenty of discussion on settings!
  7. I still do not understand what you mean. All analog volume controls are "passive" in nature. At least the volume control itself is passive. Whether or not their is inactive buffer and/or gain stage after the volume control is another thing. But it is a bad design to have a passive volume control with no active circuit after it to buffer the output, without an active line driver after the volume control, the output impedance with vary with the volume setting, and wreak havoc with the frequency response. Also, with no active circuit after the volume control, the dynamics will suffer mightily. I think you might misunderstand what Lukasz (Lampi) is dong, his DACs actively drive their outputs through he tube stage.
  8. There are quite a few DACs which can support DSD 256 via DoP. These DACs must support PCM 704.6 in order to do this. The newer XMOS USB receivers have no problem with PCM 704.6, and the Amanero USB interface can also support this with certain firmwares. In Bricasti's case, i have no idea what they had to do to upgrade their support, this would be a question for Bricasti directly, i suspect they are quite responsive to direct e-mail inquiries. Edit, additional info: The Bricasti M3 uses an analog, resistor ladder, volume control. It has to use an analog volume control as otherwise there would be no way to control the volume when using the Native, single bit, DSD DAC section. I am not sure what you mean by "active" vs. "passive" volume control?
  9. I do not have any access to power supplies produced by others, and neither I am interested in criticizing products produced by others in a public forum. I just designed the Sonore Power Supply to be as good as it could be at a reasonable cost (while still being hand built to high standards and made in the USA), specifically for getting the best performance out the Rendu Series products. What measurements do you think would be applicable?
  10. Clarification: the output of the Sonore Power Supply is not "limited". The 1.5 A output rating is what i am comfortable rating the device for in terms of continuous output current. This supply can actually output well over 2A without any difficulty, but I would not be comfortable for it to be required to output 2A continuous due to the level of heat it would produce, which could lead to failure over the long term. The reason i make this clarification is because many loads are not continuous, they may have peak currents of, for example, 2A, but only draw 1.2 A continuously, so it is important to understand what the real world loads are in terms of continuous current consumption, and peak current consumption. Also, there is no current limiting in the Sonore Power Supply. It will provide current until it burns out! The reason for this is that current limiting, while it serves to protect the supply from overcurrent conditions, also increases output impedance, reducing performance.
  11. @R1200CL, I am not sure what you are asking? 9V version of what? And where would you want to put that LT3045 based regulator? If you are referring to the Sonore Power Supply: 1. This power supply is 7 VDC for a reason. This voltage produces best results with the Rendu Series products, all things considered. I could make a 9 VDC version, this would be custom, and a premium price addition would have to apply, as doing so would require additional development and different parts. 2. LT 3045 regulators are inferior to the discrete regulators used in the Sonore Power Supplies, adding the device you mention would degrade the performance of the Sonore Power Supply and would not be recommended.
  12. Ahh, that explains it then. I can understand how the convolution plus the oversampling could be too much for the I5. I would see if Andrew can offer you a reasonable upgrade path to an ST I7...
  13. If Roon is only running at 1.5 to 2.0 that is not good news. I would recommend contacting Andrew at SGC and discussing with him. I am not sure which I-5 the ST is using. My Mac Mini is also an I-5 machine, and runs Roon oversampling to DSD 256 and 512 with no issues, and Roon shows always running fast 4X or higher. Roon says that rates below 4x are getting close to borderline, so the problems which you are having are not that surprising, although, I am surprised the ST I5 is not able to run faster, perhaps it just needs a little more cooling? A computer will throttle its capability if it gets too hot, anyway, Andrew is the man to consult with on this.
  14. Even with older recordings (which I am assuming are from analog tape masters), Hi Res transfers of them are very worthwhile IMO. I especially like DSD transfers from older analog masters. The reason I feel hi res recordings (or transfers/re-masters from analog) have an advantage is not because of the higher bandwidth and bit depth, but because of the influence the anti alias filter has on the sonics. When one either lays down tracks digitally, or makes a digital transfer from analog, one has to have an anti alias filter before the A-D converter. The higher the sample rate of the recording, the simpler and gentler this filter can be, and the less artifacts it will create in the digital result. Of course all the usual caveats apply here as well, the quality of the original recording, and the mixing/mastering there of matter more than the final sample rate, etc, etc. But given the choice between a hi res version and a redbook version of the same recording, I will always source the hi res version for my self because it can have advantages. Whether or not one upsamples it later in playback is unrelated to this choice.
  15. Hey Josh, Any comment on LCD-1 vs. EL-8? I understand this would be from memory, with a caveat for that. I have EL-8s, and am hoping with this being a newer model, that it might improve on the EL-8s sonic performance while also allowing for easier portability.
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