Hello guys
I've installed the R-8_Parallel_DOP firmware and I found it a very nice upgrade in sound quality.
A couple of questions for the much experienced ones:
1- Are NOS modes the same?
2- I loved NOS3 in my previous firmware (V3A), but wich mode (OS or NOS) did you prefer on this new R-8_Parallel_DOP firmware and why?
PS: Im sorry, I know there are posts on this thread about this subject, but there's to much information that I think it will be easier asking again.
I have been using NOS modes almost exclusively with all the FWs. I think the characteristics of OS vs NOS remains largely the same.
Though NOS itself kind of evolve, mainly for the better. I find the TDA NOS has comination of most of the good things of each NOS1-3 combined.
In general for the TDA FW (or maybe even earlier FW) I find that NOS works best with higher RES and very high quality recordings.
Tonight I just tried compare between NOS vs OS X 0 (NOS with digital filter). I have not gone to OS x2-8 yet as in general I dislike them. They tend to thin out the sound stage and reduce detailed nuances.
Interestingly the NOS vs OS X 0 are quite similar for very high Res DXD (24/352) There is added warmth of NOS but sound state is quite similar in that OS X 0 is not destroying it much.OS does make the sound stage a bit forward. For recordings that benefit from added warmth, e.g violin, soprano, NOS may be good if recording is of great quality.
When using lower RES 24/44 or 24/96, the benefit of OS is clearer, much cleaner sound, more focus and sound stage better defined, again without shrinking or collapsing it. But it really depends on quality of recording. e.g another violin recording (24/44) seems just fine with NOS, being more naturalistic, where as with OS despite being much cleaner, looses the subtle nuances of the string tone, and becomes a bit monochromatic. Another recording of orchestra and choir 24/44 shows fuzziness/muddiness and with OS all becomes cleaned up and actually much more focused, with a more forward presentation that helps.
Here is the thing, if possible avoid OS, as NOS is most naturalistic and fine details are originally presented but if recordings show glitches, it will show clearly. The other thing is that NOS is probably most affected by AC noise or any other noise from PC etc... OS tends to be more immune as I suppose the digital filters rid of the noise effect.
There may be at times a hint of musicality loss with OS though I think OS X 0 really has minimal negative effect on musicality compared with OS 2-8.
Ideally we need a superb recording, with awesome clean AC power (+/- superb LPS) and NOS would be excellent.....
I am sure many may not agree with me. And it is personal taste and sensitivity. And depends on what type of music and quality of your music recordings/files as well as the music server itself.