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Ultimate Audio Playback / Chatter and forum related stuff / Re: I'm surprised it worked
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on: February 01, 2015, 10:42:50 pm
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Ok. I wouldn't know how "hash improved" bass sounds.
And to be really honest, what description is that ? Of course it is not important at all, but hash improved highs I would understand right away.
Peter
Peter hi I agree, more likely to hear reduced hash is the highs not in the bass. I was typing a little too fast on a tablet . Sorry for the confusion. Regards, Nick. Nick, I think Peter is making a funny...instead of "hash" think of its equivalent words...mull, ganja, weed.
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432
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Ultimate Audio Playback / Playback Tweaks and Source related subjects / Re: Confirmed : PC Damping
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on: January 13, 2015, 10:39:21 pm
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So, first question regarding your jitter images in post #3 above. Can you be sure that your exercises did not affect the measuring equipment as well as well as the dac? Or perhaps one more than the other? Hi Anthony - very good point. And of course I can't tell with 100% guarantee. All I know is that the scope was on a very large kuschen for the purpose. Keep 'm coming because mistakes are made so easily ! Peter Second question Peter. Is it possible to "measure" the jitter for the different PC damping solutions to get some idea about the relative contribution of various vibrations to the change? Such as the two images you posted above...although it would be ideal to be able to generate a histogram on the jitter spectra rather than rely on the fuzziness of the line on the scope. Perhaps change one variable at a time: usb cable routing and type; proximity to the soundroom; various types of "damping" et cetera. I know that is a lot of work, but it is a nice linear workflow that may be able to shed light on which vibrations matter. As as aside, your observation that softer damping of the PC works best seems to correlate with the idea of removing or minimising low frequency vibrations from the floor/rack. Softer damping generally means that lower frequencies are absorbed by the damping. Harder footers probably serve more of a "tuning" function and in my opinion based on my limited knowledge of this subject those sorts of "tuning" footers are "tweaks" rather than solutions. Cheers, Anthony
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433
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Ultimate Audio Playback / Playback Tweaks and Source related subjects / Re: Confirmed : PC Damping
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on: January 08, 2015, 11:27:31 pm
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Hi Peter,
Interesting! But I really really don't want to be thinking about this stuff, and perhaps neither do you, the number of combinations and permutations are staggering and I think that getting to the 'basics' or essence of the issue will be very important here without getting sidetracked.
So, first question regarding your jitter images in post #3 above. Can you be sure that your exercises did not affect the measuring equipment as well as well as the dac? Or perhaps one more than the other?
Cheers,
Anthony
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434
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Ultimate Audio Playback / Playback Tweaks and Source related subjects / Re: New pocket server CAPS v4 Pipeline
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on: December 10, 2014, 05:04:22 am
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In doing my research a question has come up for Peter - Why use the I7 over a Xeon? The Xeon has a lower TDP, doesn't have on board graphics, more cores and supports ECC RAM. All these things seem like pluses for a Xeon over an i7. Certainly a response from anyone else is welcomed as well.
thanks, dave
Price I believe. The Xeons are very expensive. I purchased mine second hand for less than the cost of the i7 otherwise it would have cost twice the i7 new.
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435
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Ultimate Audio Playback / Orelino / Orelo MKII Loudspeakers / Re: Too much Bass !
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on: December 08, 2014, 11:05:02 pm
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Peter, I think that you are right about internal resonances affecting the NOS1a as well as the external musical vibrations. You may remember a while ago we talked briefly about isolating the dac clocks on some form of suspension within the NOS1a in an effort to attenuate some mechanical vibration.
But the footers that you are experimenting with would largely be decoupling the NOS1a from vibrations that come via an excited floor would they not? I think that the footers would have little effect on internal resonances, so getting the NOS1a into the basement away from the pressure waves of playback is a good start to the experiments (although you have been experimenting for some time now it seems).
Anthony
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