Hi David,
Regarding QNU (Quad No Upsampling) I take it you mean the sample rate is 176 (for 44.1 source material) but every 4 samples are identical correct?
Precisely so. Thus, nothing happens to the samples, and each one sample is just copied three times (or one time with Double).
It will depend largely on the DAC what the influence is, but theoretically it sure is there.
Is there a particular setting you would expect to sound best on an OS DAC like the BADAC?
I am sorry, but at this moment I don't know. This is because I still can't quite get why QAP works so well on OS DACs, and in fact I am wondering now whether AI also may cause wonders. The point is also that we kind of keep on "re"setting our minds and references because of other things changing (like the new Adaptive Mode), plus those other things create the base for stuff like AI. So, like I said in the other topic, I don't recall AI being so good, but ... this was with WASAPI. You could also say : how long ago is it that at least me was raving about Engine#3 while right now it won't last 3 seconds opposed to Engine#4 (even "the wife test" confirms this with ease).
Also, any updates on when your NOS DAC will be available?
I know I didn't answer this the last time David, but this is because everything is so much out of my control and so much depending on suppliers. To give an example of the last happening on this : Monday a week ago I ordered (and payed) for a couple of XO's (oscillators) to try out, and they were ordered around the corner here, so every dutch person will know who I talk about. "Will you send them out this afternoon ?" -> Sure !
So there's Tuesday, nothing. Wednesday, nothing (already impossible). Thursday, nothing ("shall I call ?, no, I'll send an email). Friday, nothing, and no resonse to email. Saturday, nothing. Monday, nothing, so call the guy. "Yea, I planned to send them out on Thursday, I will do it today now" (man, this is a WEEK later). Tuesday (yesterday), a note in the mailbox that a package was to be delivered, but nobody was home, so the package was dropped at the nearby post office. Sadly, at the postoffice there is nothing.
But today it's another Wednesday, and another chance for something which should have taken 1 day, and now takes 9 already.
I have my own company for 24 years now, and I always have survived with no mater what hardware suppliers throughout time. How strange it is that *everything* (and I mean, no exception) around this DAC takes ages or just doesn't happen in the end. The story about Firewire is known I think, but it never stopped after that. And it seems that this can only go similar to how doctors operate : they won't proceed on a next test before the result of the previous is known. So, how can I proceed with a next step, if the previous is not known. And sadly (no, the most sad) this is not about the technical solution, but merely about the practicle solution (like talking with a supplier about his solution for a month, while at the very end -all dealt and done with- he suggests his product goes EOL and I better wait for a next version, due in 4 months. It is just crazy).
Anyway ... as the very last part of "can't be better" those clocks get in hopefully this week, and assumed they do what's asked from them the very last part has to arrive which allows me to proove that 24/384 indeed works in practice - which will be an exciting moment because it will be a glueing together of software and hardware from several parties and which comes together only at my place. If it doesn't work we can go with 24/192 (and mind you, I am using that all the time myself) or wait another round for a next attempt. Such a "round" can theoretically take 3 weeks or so, but this last time prooves it can also be 3 months.
One last thing : to be ahead of 384 not working, I have already produced 10 boards in 24/192 setup for those who don't want 384 anyway and wish to pay less.
Now you know ...
Peter
