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721
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Ultimate Audio Playback / Phasure NOS1 DAC / Re: Break in of NOS1
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on: December 07, 2011, 12:27:09 am
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Coen,
how far are you in to break in of the NOS1?
Claudius
Not as far as you. The NOS has been on ever since wednesday November 30, it has been connected to the computer about 100 hours of which 75 hours of playing music. I experienced some quite dramatic changes in SQ. Actually what you describe I recognise from the past days. I think patience is key with such a very sensitive component. I made a few tube amps (concepts) with black gate capacitors and these really need 300+ hours break in (>12 days) to sound anywhere decent. You probably wanted to adress Flecko in your last post...  regards, Coen |
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722
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Ultimate Audio Playback / Phasure NOS1 DAC / Re: Break in of NOS1
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on: December 05, 2011, 09:29:03 am
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The control panel should do for the USB part, but an entirely new NOS USB also needs its da/analog/power sections broken in. I guess it must need some signal to get "charged".
Since for some reason I don't succeed in playing ridicously long playlists, so I opted for AB-ing one track. In order to prevent me from braindamage I switched the amp off.
Claude, I concur with your findings wrt breaking in the NOS1. Everytime I take a listen it sounds different again.
regards, Coen
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725
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Ultimate Audio Playback / Phasure NOS1 DAC / Re: PC Tweak for NOS1 async USB
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on: November 28, 2011, 09:28:45 pm
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I get a lot of extra noise when I dim the monitor (I mean less luminous, not off). Furthermore I found the monitor powerplug orientation and place on the powerstrip surprisingly audible. Could it be me or do I see an aftermarket high-end-filter-monitor-decoupling-plugin-tool-opportunity here  ? regards, Coen |
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726
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Ultimate Audio Playback / Chatter and forum related stuff / Re: Gainclone heaven ?
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on: November 18, 2011, 12:45:25 pm
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Hi Adrian - the gain is defined by the value of two resistors Rf and R3 in Peter Daniels kit and it will be similar in yours I am sure. You can change the gain by selecting different values for those resistors. True. But notice the relation between the higher resistance (higher value Ohms on the resistors) and the thermal noise implied. So, there's also a relation between the supply (V) applied and what value of the resistors now need to "surpress" the gain. But, sort out the way this works, because "feed back resistors" operate like the higher the resistance, the more gain you will have. Thus also (and for Nick) : the higher the supply, the lower the value of those resistors, the less (thermal) noise. Regards, Peter Furthermore dont forget to look at the specsheet of the chipamp for minimum closed loop amplification if you plan to change the resistor ratio. For the gainclone chip this is about 20X (as I remember...), lower and you are asking for problems (instability). Regards, Coen |
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727
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Ultimate Audio Playback / Chatter and forum related stuff / Re: The virtue of some volume change lag
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on: November 13, 2011, 01:46:53 pm
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I also noticed this recently, that is it changes for a second time. I don't change volume very often and took it as standard 'feature' of the way it operates.
If music is playing it allways takes some time to take effect (a couple of seconds in my setup) and even in 6-1c sometimes the volume doesn't change at all.
Off course this is in attended mode.
Regards, Coen
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728
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Ultimate Audio Playback / Phasure NOS1 DAC / Re: NOS1 on spikes
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on: October 20, 2011, 12:12:27 pm
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Shure there must be a mechanical difference between pfte (or other plastic) and a laquer coating causing a different mechanical resonance. Think of a violin coated with pfte, though copper is much less resonant than wood of course.
Regards, Coen
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730
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Ultimate Audio Playback / Phasure NOS1 DAC / Re: NOS1 on spikes
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on: October 14, 2011, 08:21:30 am
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If you want cheap and have nice results try some turned wooden doorknobs. Quite nice, especially for the money. No mf/hf hardness and a noticible increase in definition and space. You could even experiment with some laquer for full tone. I use it under all my digital sources (even the pc).
The drawback with these "spikes" is that the topsurface is quite small and thus not so super stable. (even less stable than a commercial grade threesome)
I'd say all this decouplingstuff sounds like how you would literally describe it.
Regards, Coen
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731
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Ultimate Audio Playback / XXHighEnd Support / Re: Problems with sound with version 0.9z-6-1b
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on: October 11, 2011, 02:06:08 pm
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Can't remember. I ususally hit stop asap after any lack of sound.
I occasionally get engine #4 time out messages though. Can't see any clear pattern (filesize maybe; an instance of xxengine#3 still busy with the previous track?). In line with the message it is allways at the start of a track. After stopping and restarting everything runs fine again.
Next time I will look closer.
regards, Coen
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733
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Ultimate Audio Playback / Your thoughts about the Sound Quality / Re: Sound of FLAC?
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on: October 02, 2011, 04:50:31 pm
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The second post in this thread: Like I suggested before (but never received a response to that) - Set "Don't play at all", click Play on the first track of the album while Unattended is activated - let all rest and reboot now. Next get your AutoHotkey running (this might need some additional "setup" for that by now, because since 0.9z-6 it is expected to be loaded by XX automatically) and use Alt-P.
This way you will be using the same WAVs as implied by any other conversion (like from Foobar) and nothing can have happened to let it sound different (from that Foobar conversions), unless you put the Foobar output in a completely different place.
If then the difference is as clearly noticeable, let me know.
Also notice that as implied by the earlier posts about this, I can do something about it, if only the above procedure indeed prooves that this makes the difference. As long as this is not clearly proven I won't do a thing (and indeed, I don't test these things just because of a lack of time for it - I'm not good at A-B stuff either).
Thanks !
Peter
So i heard a clearly noticable difference (see following posts). That is that the obvious and annoying difference between FLAC and wav was a good as gone after above procedure (rebooting and all). If you can hear a difference between xx versions you should be able to hear this one easily. My question about the fix (first post on this page) was about your last remark. So what do you consider as proof? Regards, Coen |
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735
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Ultimate Audio Playback / Music Storage and convenient playback / Re: FAST audiophile ripping
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on: September 30, 2011, 09:28:29 pm
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6. The files are written in a different ways on the hdd and it is the difference in hdd reading pattern (read noise) that you observe. 7. I have allways wondered how long startconditons or errors (even single ones) persist in the music. Not playing true nos some filtering is allways applied (steep filters are usually FIR). These filters have a 'memory' for all samples involved in the filteralgorithm. The larger the offset or error, the more noticable this should become. I allways considered FLACs as lossless, so data in flac = data out flac. Never tested this though. If the data and checksum (which accounts for sequence) are equal and it still sounds different, it must be the processing (on the pc or in your brain ). Rambling on, Regards, Coen |
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) Xx starts playing in this case without sound.
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