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In Reply to: RE: cMP - the open source high-end Memory Player posted by cics on December 30, 2007 at 05:42:01
My findings after long term use is to NOT use this option. Initial sound is very good but is not consistent: long term SQ changes towards being "bright".
What are your results with "/nopae" removed?
.
Hi Cics,
It took me a little D-tour, but now reading you’re post, I’m leaning too the same conclusion to remove it.
It now explains why my cMP setup sounded not okay after adding a dedicated linear power supply too power the P4 pin last Wednesday. After adding the linear PS too pin 4 the sound was like ‘on steroids’. Everything bigger and impressive but not something you want to live with.
First I blamed the simple linear power supply for that. It looks a bit like this one. Only with much better ripple specs ! (max 2,5 mV)
http://www.tripplite.com/en/products/model.cfm?txtSeriesID=310&EID=3075&txtModelID=234 ( I can’t show the actual linear PS I ordered because one cannot directly link into the dutch version of radio shack (www.conrad.nl) too show it .
Adding the b22 cplay version today bettered things a little. But the sound was still not okay.
Very detailed, but still ‘forward’ and ‘in you’re face’. Hi-Fi-isch if you like.
Reading you’re post this morning, I removed the /nopae and that did the trick.
Now everything sounds balanced (not forward and upfront anymore)
By the way: very very nice last version (b22) of cplay
Again there is more 3D, space and better treble without being forward and upfront.
LynxL22 dig i/o -> Lavry Black DA10 -> Mogami Gold -> Klein & Hummel O300
I agree, what was initially more transparency turned out to be too much over the top after a while.
nopae is out.
Results from removing and then re-applying "/nopae" to my CMP1.2/cPlay2.0b4 rig - comparison made using HDtracks 24/96 FLAC sampler files are:
removing /nopae - mid-range has more noticeable detail, treble less prominent as a result yielding a 'refined' presentation
re-applying /nopae - bass more tuneful with better dynamics, treble more obvious but overall effect somehow more 'alive'
As I have XPPro SP1 and am limited to 2.0b4.....YMMV
Hello, again, cics! I tested it. The results:
My CMP-cPlay is built around Biostar mobo, all optims done exept minlogon
Played first WITH nopae Jethro Tull Roots To Branches. This disk is recorded very openly, rather bright and in quiet passages we can easily hear artificial echoes or reverberation of brushes on cymbals. If played on a bright cd player these echoes turn into constant HF sheen, or noise, or haze... Now, this is what happened on b 22 WITH nopae.
I removed it from boot.ini and No more sheen, or haze. However it should be noted, that though initial attack of short sounds was not lost, some slightest level of detail was gone. I'd say the loss is infinitesimal or probably even imagined.
On Van der Graaf Generator's Trisector, which is recorded almost ideal no loss occured. Such results. My opinion is Not to use /nopae. Had it since b 20
Serge.
Edits: 04/18/09
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