JaMo
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@christianvogel: Creative! Good thinking. /Jan
Hi Christian.
Are there between the 3 nos modes ones that are synchronous, meaning the clock from the i2s signal is taken as is (no reclocking)? This is a possibility with the nos7, if i am not mistaken. I have an excellent i2s source so i will try NOS soon, just curious.
where can I find docs [or a blurb] on what the different combinations of ATT jumpers are purportedly accomplishing? (and all the jumpers for that matter)?I agree that NOS is more sensitive to upstream jitter and noise than oversampling. That was the main reason oversampling was invented.
where can I find docs [or a blurb] on what the different combinations of ATT jumpers are purportedly accomplishing? (and all the jumpers for that matter)?
I take it NOS can be accomplished by jumping IPS0 & 1, or jumping S2?
That's what Kingwa seemed to imply as well in an email exchange. I guess then mode 2 preserves the timing of the source better for whatever reason. I will give it a try.Hi @FredA, I may be wrong but what I remember from Jos from Magna Hifi, the FPGA is always in play.
- NOS1: direct and most compatible NOS mode
- NOS2: using FIFO (I assume FIFO buffering)
- NOS3: accurate mode (preferred by mr Kingwa but not selected by default because it is more critical)
My favourite NOS mode so far is mode 2 (FIFO). This was only the case after upgrading to the Mano, before that I preferred mode 3 (smoother sound).
S2 switches to NOS, and ATT0 and ATT1 switch the NOS and OS modes (depending on which you selected).
See halfway down the page here: http://www.audio-gd.com/R2R/R2R7/R2R7EN_Use.htm
From this I gather NOS3 is the least smooth ...
and from this I gather NOS3 is the most smooth ...
Regardless of which one is right, does NOS2 split the difference (or is this not a linear scale)
And once I know which NOS is most accurate (least smooth), I'd like to know which of the available OS modes that best resembles (2x, 4x, or 8x)?
I read tech docs a lot, and to me when I read those two tables (S2 OFF vs ON) it's not clear why I can't engage NOS with S2/IPS0/IPS1 => 0/1/1
From this I gather NOS3 is the least smooth ...
and from this I gather NOS3 is the most smooth ...
Regardless of which one is right, does NOS2 split the difference (or is this not a linear scale)
And once I know which NOS is most accurate (least smooth), I'd like to know which of the available OS modes that best resembles (2x, 4x, or 8x)?
I read tech docs a lot, and to me when I read those two tables (S2 OFF vs ON) it's not clear why I can't engage NOS with S2/IPS0/IPS1 => 0/1/1
I take it NOS2+PLL would offer the best jitter rejection/suppression but also be the most fragile lock. I look forward to testing that via USB and I2S.and mode 2 to me sounds cleaner and things have more impact
I take it NOS2+PLL would offer the best jitter rejection/suppression but also be the most fragile lock. I look forward to testing that via USB and I2S.
and while I have your attention...
To engage NOS I'm jumping S2 and then ignoring the top table - Right?
The bottom table says IPS0/IPS1 are "Reserved" so I can ignore those jumpers entirely - Right? (or am I wrong and I must still jump IPS0/IPS1)
Listening to NOS2 now.
The attacks are not as sharp but the soundstage is a little better. More depth as well and the sound is more laid back. Overall, it's more relaxed, smoother. Better bass presence but maybe not as defined. It's quite different, that's for sure.
I will try software oversampling with it and see.
@FredA I tried OS through Roon with the R2R-7 in NOS, and I like Kingwa's OS a lot better. Curious how you will experience it.
And if I stay on the top table (not jumping S2), what could I expect from this combination?You need no jumpers for IPS0/IPS1.