I guess that's a no. The system I was thinking about was UDS, Ultimate Digital Studio, with DCS, Disc Commercial System:
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You didn't understand what's written. Perhaps you need to understand what you are writing. "perfect sounding DAC" doesn't mean anything without the context and description which you didn't provide any and I filled it for you.
There are posts disappearing, maybe it got too medical - even though posts about supposed effects of ultrasonics are to some extent related to the topic of the thread.
Yes, Marcel, there certainly are. With no Moderation team notice or explanation. I don’t believe the posts violated any site policies. The subject is technically related to the thread, so, it wasn’t non-sequitur, or completely unconnected. Very odd.
"Havana Syndrom" is tied to politics. Thus Rule #2 applies.
I have silently cleared two batteries of posts, I hoped you would have gotten the message.
George
With all respect George,
but I do not see how brain damage, most likely caused by microwaves, can be regarded as a political instead of a technical issue.
That it may be used as a political instrument, just like radio and television, doesn’t change it’s technical background.
Just my 2 cents.
Hans
but I do not see how brain damage, most likely caused by microwaves, can be regarded as a political instead of a technical issue.
That it may be used as a political instrument, just like radio and television, doesn’t change it’s technical background.
Just my 2 cents.
Hans
"Havana Syndrom" is tied to politics. Thus Rule #2 applies.
I have silently cleared two batteries of posts, I hoped you would have gotten the message.
George
George, of course, it was obvious the topic was somehow provoking Moderation objection. What I couldn't understand was, why. I still don't understand why, however, the topic is dropped.
I would like to know from members what they personally prefer with the dac chip with current output according their journey with DACs :
1) NOS or OS
2) And with either, what they prefer : non post filtering or reconstruction (Sallen Key active, passive, SINC, what slope at the end, passive DC blocking or no (if in the active filter)?
I dunno if the rigth place here or if it deserves a thread. It is not to rediscuss the theory but more to know the trade off people prefer to live with at the end. Not to discuss the validity of their choice.
Thanks
1) NOS or OS
2) And with either, what they prefer : non post filtering or reconstruction (Sallen Key active, passive, SINC, what slope at the end, passive DC blocking or no (if in the active filter)?
I dunno if the rigth place here or if it deserves a thread. It is not to rediscuss the theory but more to know the trade off people prefer to live with at the end. Not to discuss the validity of their choice.
Thanks
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Depends on the particular dac and the particular OS (if any).
Depends. Filters should be able to be better than no filtering, at least if the filter is well designed. There are many different ways to design filters, though. Some sound better than others.
...I think the main point I am trying to make is that the reality is not quite so simple as the models your questions seem to imply.
Let assume each time the filter is optimal. And if OS, it is optimal too (no noise or distorsion added)
An ideal sinc filter takes infinity time to process the audio out of your dac. Would you consider that optimal?
Even then, your models are oversimplified. What about the output stage opamps? How much RF can they take? What kind of power supply for them is best, shunt or series? All this stuff interacts. There is no simple answer in the general case.
For my particular MarcelvdG RTZ DSD dac, the best sound out of it so far is with upsampling and conversion to DSD256, but only with one very particular algorithm. Does that generalize to a TDA1541? I don't think so.
Even then, your models are oversimplified. What about the output stage opamps? How much RF can they take? What kind of power supply for them is best, shunt or series? All this stuff interacts. There is no simple answer in the general case.
For my particular MarcelvdG RTZ DSD dac, the best sound out of it so far is with upsampling and conversion to DSD256, but only with one very particular algorithm. Does that generalize to a TDA1541? I don't think so.
I was heading down the DIY DAC path for a couple of decades.... and realised the money I spent was astronomical. I was also spending too much time building and tinkering instead of - just listening and enjoying the sound!!! The sound was very good indeed, but lacked in two crucial segments:
1. I was able to get either very good NOS and PCM playback or very good DSD playback, and I was not happy with that fact at all. I believed that I personally deserved a great quality sound from all 3 options.
2. The aesthetic appeal was poor. I could never build the case to look worthy of being presented in a way that would fully satisfy me.
So, I looked for a commercial DAC that could give me all of the above.
With such DAC, after trying different options for more than a year, I believe the best overall sound for me is PCM, with the original material being oversampled (if required) just slightly to end up at a 4x "normal" sample rate. This is a perfect blend of resolution and top extension, spatial information preservation, and natural harmonics/timber.
To get close to the above with DSD, I need a very powerful CPU, as required by a very demanding HQPlayerPro DSD modulator. I also found that at least x256 processing is required for the DSD to sound really good. My kids like this sound more than PCM; I prefer PCM... but only just.
Sometimes I just listen to NOS... as a background music option when I am doing something.
So, in the end, it is good to have all bases covered!
Digital filters are a necessary evil, and I understand why some people feel like they’d be better off without them. But in reality, neither option is ever perfect, and endlessly chasing perfection by spending more and more money isn’t exactly a rational decision...
For sure.... Seems industry has chosen its camp since the beginning, at least correct anti alliasings garbadge whatever if better sonically or not.
They at best permitred to disable it sometimes.
They at best permitred to disable it sometimes.
What if the NOS DAC has a 12 dB passive filter output after the I/V made from an op amp ?
If the op amp feedback is filtering by a cap, the -6 dB add to the 12 dB after but only from the beginning of the 6 dB bandwith, rigth ?
So in case of NOS, should we compute these two passive filters to beginns at 21 K hz (most of the rreccording are 16/44.1 Hz) ?
What if the materiel is 88 K hz or 192 K Hz occasionally ?
If the op amp feedback is filtering by a cap, the -6 dB add to the 12 dB after but only from the beginning of the 6 dB bandwith, rigth ?
So in case of NOS, should we compute these two passive filters to beginns at 21 K hz (most of the rreccording are 16/44.1 Hz) ?
What if the materiel is 88 K hz or 192 K Hz occasionally ?