That is good news! dsdclk firmware is sounding very good on my R7 system as well, PCM OS 8x...crisp sound! Very sparkly! But oh so clean... Soundstage is huge! I'm using the F1 so can only image what the U16 sounds like in comparison. .
haha, you just said you hate FW update and recommend to wait for a bit more but now you just loaded the latest FW, though I suppose you want to resolve the U16/I2S issue?
Do you think the DSDclk actually also makes it sound better using F1, I presume it should only improve DSD sound.
Interesting when I am currently using CD transport source 16//44 comparing OS 0 vs OS 4 where OS 4 seems to be giving a very nice holographic image. As expected when switched to NOS the sound is more relaxed and less forward, though the imaging seems to be a bit less precise, but it appears more naturalistic, like you are sitting say at least 15 rolls away from stage in a spacious acoustics, less focused sound.
With OS X 4, the instruments are closer/more forward, maybe 8-10 rolls, and instruments more easily located, more like you are seeing them in front clearly. The NOS spreads the instrument out a bit more (more like in a church kind of effect...well I just checked the recording venue now of this particular recording, it was in a church!) So basically NOS probably presents a more realistic sensation of the actual venue of the music event. By contrast the OSx4 has changed the location to more like a concert hall platform with a less reverberant acoustics. Switching to OSx8 briefly shows a more exaggerated effect of OSx4, at times feel like you are now in a recording studio with close mics, all instruments clearly delineated. Sorry for rambling on....But it is interesting that with NOS I guessed that the recording venue was in a church (blinded as I did not know at that time). Both modes are still very nice.
(I believe currently I have the old TDA asy. FW just before the P upgrade version, as per Magna)
(note I am testing via speakers, in a not well treated room)