XXHighEnd - The Ultra HighEnd Audio Player
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 21 
 on: August 04, 2019, 09:57:51 am 
Started by Nick - Last post by Nick


I have a mental note to periodically refresh my Vhd OS file in this way. This morning I did it whilst taking some before and after FFTs of the system response and there are some clear differences. You don't need the FFTs to hear it make a difference but they made me think it was worth sharing.



Nick, I would be most interested to see these FFT's.

Anthony, they were taken with a phone app (although using a calibrated mic) and I didn't save them. I was not really meaning to prove this or even post but afterwards thought it might be useful for others to know about.

IIRC the stand out differences in the ffts before refreshing the Vhd file were noticable roll off above 8k and lower amplitude between 3k and 7k. Lower frequencies were similar in the FFts but that only shows amplitude response. With the refreshed Vhd this range significantly tightens up so transients and tone resolution is probably improving in this range. 

Kr

Nick.

 22 
 on: August 04, 2019, 06:54:00 am 
Started by Nick - Last post by PeterSt
I do wonder sometimes that we subconsciously need change to keep our interest going.

Robert, IMO this is definitely so. I always noticed with the car stereo; It really does not matter to what brand / new radio you switch, it always exhibits better "stereo" (as in channel separation) as such. Even if you in the end switch back to the first radio.

Peter

 23 
 on: August 04, 2019, 06:51:29 am 
Started by Nick - Last post by PeterSt

Hi Nick,

With great apologies in advance because I might not understand what you are doing for real this makes no sense.

a. We put in the disk at boot;
b. No OS is running, but the vhd file is copied into RAM;
c. The OS boots from RAM.
d. Right after that you take out the disk.
e. Play for as long as you like, if you only understand that this "degrading" vhd file is in your drawer all the time. Happy
f. You want to shut down and put back in the disk.
g. Your XXHighEnd settings are saved to the disk (in the vhd file) - but only on your command. The vhd file is not used for anything else.
h. You go on vacation or whatever and may let in the disk or put it in a drawer again.
I. Refreshed ? then back to a.

Now tell me
dntknw

Maybe next time leave out step g. But we already know it's not that, do we ?

Best regards,
Peter

 24 
 on: August 04, 2019, 06:43:42 am 
Started by Robert - Last post by PeterSt
Hi Robert,

It would be relatively easy to implement. However, that can only happen when I can test it. And that requires a physical (DAC) example.

Which DAC is that ?

Regards,
Peter

 25 
 on: August 04, 2019, 02:35:15 am 
Started by Nick - Last post by acg


I have a mental note to periodically refresh my Vhd OS file in this way. This morning I did it whilst taking some before and after FFTs of the system response and there are some clear differences. You don't need the FFTs to hear it make a difference but they made me think it was worth sharing.



Nick, I would be most interested to see these FFT's.

 26 
 on: August 04, 2019, 01:00:45 am 
Started by Nick - Last post by Robert
Interesting Nick, I certainly reboot Ram once a week anyway. I will try that.

Note I have also changed my Custom filter back to Arc P. Definitely seems to have more treble detail if not slightly brighter, instruments more real.

I think we all need 2.11 sooner than later!!!!

I do wonder sometimes that we subconsciously need change to keep our interest going. Certainly the changes introduced with the Lush 2 could give one a headache, not that I have gone down that road yet.

We mustn't loose sight of the music.

 27 
 on: August 04, 2019, 12:39:16 am 
Started by Robert - Last post by Robert
Reading the new release of an upgraded NOS/OS Dac today which has this capability, I wondered about XX/Phasure running to this figure. Has it been tried?

Robert

 28 
 on: August 03, 2019, 03:16:37 pm 
Started by Nick - Last post by Nick
Hi fellow RAM OS disk users,

I thought I would post this in case it helps anyone using the RAM OS HDD disk. This situation has come up quite regularly for me so I think it is a real effect (its also possible that the effect is down to me doing stuff to my audio PC system that most other people will not be doing).

Over time (think a few months of regular use) I experience what I think are very slow cumulative changes in SQ. They amount to rolled off highs, lack of musical dynamic slightly muddied bass and a generally untidy sound.

What has helped correct this on many occasions now is to refresh the RAM OS .vhd file that I am using. I do this by booting into the WIN 8 BASE OS version and then deleting .vhd file version I am using and then coping a "fresh" copy of the same file back to replace the deleted copy. Most importantly the fresh copy has not been used to play music before eg it is an origionaly copy of the OS file that was provided by Peter. Then I have a couple of XX settings I have to reapply and its all good to go.

I have a mental note to periodically refresh my Vhd OS file in this way. This morning I did it whilst taking some before and after FFTs of the system response and there are some clear differences. You don't need the FFTs to hear it make a difference but they made me think it was worth sharing.

The pick up in sound quality with the fresh Vhd copy can be very surprising  Wink. And its so convenient to refresh the entire audio PC OS with just one file copy thanks to Peters RAM OS disk.

I hope this work for and helps others who have been playing with the same .Vhd for a long time.

Kr,

Nick.

___________________________________________________

Update.

The update below is to clarify and provide a step by step description of the remady....

The idea behind this post is that over time (and posibly by unitended missuse) something happens (ie is changed) in the vhd image file that is mounted at boot time and that this causes sound quality to be degraded. The "improvment" I am highlighting in SQ is really the "restoring" of the sound quality to that origionally intended by the RAM OS system. My experiance is that the degridation in SQ of a given instance of a MYW10-14939.vhd virtual disk image file takes place slowly over a relativly long time period and can be quite significant. The slow change means its hard to detect, but also very nice when SQ is restored to its normal level again. There is no chance of missing the change.


The restoration to the intended RAM OS SQ is simply achived by deleting the version of the MYW10-14939.vhd file that has up untill now been used to run the Audio PC, and replacing this file with a fresh copy of the file made from the backup version MYW10-14939 - copy.vhd of the file.


I have been performing the following steps.


1) boot into Win 8 BASE OS

2) open explorer and delete the current version of the disk image file I suspect might have degraded SQ. I use W10 14939 so the file deleted is MYW10-14939.vhd which is in the root directory of the D: drive on the RAM OS disk.

3) replace the deleted file by making a fresh version of the deleted file by making a copy of the backup version of the file MYW10-14939 - copy.vhd. Then rename this newly created copy  to MYW10-14939.vhd so that this then new copy now becomes the file that the RAM OS system will boot from when W10 14939 is selected.

4) run XX (still in Win 8 BASE) to use the "boot into" XX screen to select the 14939 BASE operating systen and reboot.

5) when the system reboots into the 14939 BASE I make any changes needed to XX player settings to get back to my normal setup (eg sfs x-tweeks etc).



 29 
 on: August 03, 2019, 11:46:40 am 
Started by PeterSt - Last post by PeterSt
Question:
When experimenting with different configurations do you have to turn your equipment off? or can you change configurations while music is playing?

Interesting
I would never do it during playing, because chances are very fair that this is about ground loops ("somewhere") and that these are not broken when music plays (current is flowing through the signal cables). Then you stop playing, the groundloop changes (or just emerges because of that !) and next you press Play and it will sound different than prior to pressing stop a minute ago.
This can be so. And this I wouldn't do it.

Peter

 30 
 on: July 31, 2019, 12:33:44 pm 
Started by PeterSt - Last post by badgerline
It seems we have very similar subjective experiences to this configuration.

it is fine to change config 'online' and powered up with music playing; there will be no clicks or pops, unless you move the cable enough to disrupt the USB transfer at the source or destination. However, I personally recommend trying whole hours at a time in each config rather than rapid A/Bing, which becomes so confusing as to mislead after a handful of changes.

Please experiment and report back!

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