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 71 
 on: April 26, 2016, 08:05:59 pm 
Started by manisandher - Last post by manisandher
Haha... I knew there was a reason why I chose 24/48 for those!

Mani.

 72 
 on: April 26, 2016, 05:32:09 pm 
Started by manisandher - Last post by PeterSt
Quote
(I don't even remember what I was doing, but it was quite annoying because I was testing something (?) which required start of playback each 5 seconds or so).

LOL, I was comparing YOUR recordings ...

Peter

 73 
 on: April 26, 2016, 10:54:48 am 
Started by manisandher - Last post by PeterSt
Indeed that tick is always there, but strangely enough I only noticed myself last week (I don't even remember what I was doing, but it was quite annoying because I was testing something (?) which required start of playback each 5 seconds or so).

I don't think that tick belongs and I really wonder what it is. Should be something like me myself not detecting the current state and explicitly re-engage the 48 clock while it is already running. Or it is something with Windows 10 ? Point is : this wasn't so (I think).

Peter

 74 
 on: April 26, 2016, 10:19:03 am 
Started by manisandher - Last post by manisandher
It seems that the NOS1a switches back to the 44.1 oscillator by default. What I mean here is that if I play a 48 track, and then stop, and then start another 48 track, there is always that small tick before it plays. So the NOS1a has defaulted back to 44.1. So I can't simply play one 48 track and assume the 48 oscillator is still engaged and 'warming up', or 'burning in'.

I wonder if a 'cold' 48 oscillator would give the sound a bit of an edge compared to a 'warm' 44.1 oscillator. Is there even a case for deriving everything from a single 'super' oscillator that remains primed and ready to go all the time? I strongly suspect not, as all high-end gear has 2 oscillators... but I just wondered...

Mani.

 75 
 on: April 26, 2016, 10:10:28 am 
Started by manisandher - Last post by PeterSt
Mani,

Phew, good question, as I never really thought about that.
Maybe they even require burn in ?
Point is, I hardly ever play 48 based material, and if I do it is coincidence. So my own 48 based clock should be pretty cold ...

I suppose that is the downside of switching off the other oscillator so it won't influence tyhe "playing one".

Regards,
Peter

PS:
Quote
Point is, I hardly ever play 48 based material
Ok, not true because I watch at least one movie per week (and they always use 48KHz sound).

 76 
 on: April 26, 2016, 10:04:05 am 
Started by manisandher - Last post by manisandher
Hey Peter, a quick question...

If I've been listening to a 44.1 based file for hours and then switch to a 48 based file, will the 48kHz clock need to be given any time to warm up? Or is it 'on' all the time?

Mani.

 77 
 on: April 26, 2016, 10:03:33 am 
Started by PeterSt - Last post by doublelife
Peter,

This is the correct link:
http://www.wellsaudio.com/headtrip/

Paul

 78 
 on: April 25, 2016, 05:25:57 pm 
Started by PeterSt - Last post by PeterSt
The typical way to connect a headphone in a balanced way is 2 ways. You can use
- one 4 pin Neutrik XLR
or
- two 3 pin Neutrik XLR
connectors

See here a picture of a implementation by Violectric for 4 pin:
http://www.violectric.de/produktdetails-de/hpa-v281.html
and
http://www.wellsaudio.com/products/headphone-amplifiers
for a 3 pin hybrid implementation

Hi Michael,

I have a couple of questions :

Why is that Violectric having two jack plug outputs ? Is that for balanced left and balanced right or something ?
Or is this just so that two people can listen ?

About the Wells, why do you call that a "3 pin hybrid" implementation ? This with the notice that the page you link to seems not to exist ...
(and I suppose it has 2x 3pin XLR)

Thank you in advance for answers,
Regards,
Peter

 79 
 on: April 25, 2016, 11:26:47 am 
Started by manisandher - Last post by manisandher
Thanks Peter, that makes sense. FWIW, I too have a strong preference for Low but sometimes (very rarely) engage Mid if I think there's too much HF grunge (for example with that other DAC I had here recently).

Isn't it interesting that an earlier roll-off can make the sound 'brighter', just because of lower distortion in HF that you can hear!!! So if hires really does sound better, it's nothing to do with the extended frequency range - more likely better phase and timing (pure speculation, because to my ears redbook can sound absolutely fine).

Fascinating stuff!

Mani.

 80 
 on: April 25, 2016, 11:13:15 am 
Started by manisandher - Last post by PeterSt
Hi Mani,

Well, each of the filters is "build up" in a different fashion (like the umber of poles you mention) so it can easily be that. And if the other 3 have a similar sound, then it is coincidence when that would be because of the build up. Of course I see you looking at the 2x 17 for the Low and the first High above, but ... ok, maybe.

My explanation would be a very different one :

I use the Low because there's more "high" in it. This could be hard to explain, but when the high frequency sines are better shaped, they will audibly express more highs to your ears and it is genuine. Remember that this is at the cost of the even higher frequencies we are not suposed to hear very welll anyway (like 16KHz in this case) ...

The High filters approach it the other way around;
They exhibit the most of the highest frequency but now at the cost of THD. The effect ? more highs again.
scratching
So yep. But this time because of the sines out there being too much of a square, so to speak (they are not nice sines because of the implied distortion).
Maybe it is not 100% justified, but squares are more "high frequency"; the "not justified" springs from a kind of chicken egg problem, because a "square" in the music first implies high frequency (a square is build from many high frequency sines), which goes odd because the high frequency sines required, which become square - and those ... etc.

Anyway, the High filters too implies high frequency but that is false.

Lastly, I should add that I use Low from pure theory - I like more highs. So once in a while it is really so that I engage Mid to get rid of too much highs, for the situation of concern. That this next helps is because my theory is right, or that you are right that something is odd or different with Mid. But as long as my theory is there, I like to stick to that ?

Happy
Peter

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