Naqref™ skrev:Vad kan i princip bli bättre än DVD-A som redan är systemmässigt ca 12 dB bättre än vad dagens finaste pryttlar klarar av?
allt som gör man måste betala hutlösa priser till bolagen kan göra systemen bättre. Enligt bolagen.

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Naqref™ skrev:Vad kan i princip bli bättre än DVD-A som redan är systemmässigt ca 12 dB bättre än vad dagens finaste pryttlar klarar av?
AVR4000 skrev:Alla som predikar att "skivor" kommer att ersättas av nedladdning: hur flyttar man data i framtiden?
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Piotr skrev:Maarten skrev:Förvånande läsning (intevjun med Meitner).
Vad syftar du på då?
/Peter
Meitner: … well, if you have it in the one bit DSD format, you can, (A) you have a pretty robust storage that way, (B) you can now convert it to any other format that may come about, PCM 96/24, whatever. So it’s a very versatile format to begin with. And don’t forget that every A to D converter that you see on the market today starts off as a DSD modulator. So then you have the DSD signal on the A to D that just goes to the PCM down sampler or decimator and gets turned into PCM, so the life of the audio in the digital world really starts off as a one-bit signal.
Pappas: And so when you try to squeeze 120 dB of dynamic range and still maintain a DC to 100 kHz signal, that’s got to be pretty tricky.
Meitner: Mm-hm.
Pappas: Does that translate into "expensive"?
Meitner: Not necessarily.
Pappas: So you feel that you can build these products for a competitive price compared to a PCM converter?
Meitner: Oh, absolutely. Because in a PCM converter you have much of the same problems, except you don’t see the high frequency problems directly. But you might still see them as intermod, and if you don’t see them, you hear them as bad sounds. And, you know, what was very helpful for me is that for years I worked with a company called Amber Electro Design and we built distortion analyzers.
Pappas: Very good distortion analyzers.
Meitner: Yes, so again I did all the analogue work on that. So, low distortion, low noise, and wide bandwidth is not a strange thing.
Pappas: The world is working on two different standards here. One end of the spectrum is pushing 96/24 PCM which basically is nothing more than hot-rodded 44.1…
Meitner: Right.
Pappas: … and then you guys are coming in from a completely different angle saying, "Forget PCM. There’s a better solution here."
Meitner: Uh-huh.
Pappas: I understand why I think it’s a better format. Tell me why you guys think it’s a better format.
Meitner: To convert audio into PCM is a very alien thing, whereas if you look at the convert audio into one-bit format, it’s a very natural thing. In any form of conversion, you will lose something. You have to choose the format where you lose the least, which means the format that’s the friendliest to audio, which is definitely DSD over PCM.
Just look at one problem with PCM. Imagine what happens at your zero crossing. You have all those bits flipping. You have, you know, noise shock in the system coming off the power supply if all of a sudden 23 bits change from all zeros to all ones. You have that at every zero crossing. And you need really good error correction, because if a sign bit gets screwed up in the process, all of a sudden instead of your signal being positive, it thinks it’s negative.
Pappas: That wouldn’t be very good.
Meitner: No. And the other thing is archiving our recordings, which to me is a very important part, because the old audio tapes are falling apart, and somebody needs to do something with them. If you convert them to PCM now, you’re nailed into that format. You can’t ever get out of it. Whereby, if you do it in the one-bit domain, in the DSD domain, you can convert it, like I said before, to any other format again.
Pappas: Through the use of…
Meitner: … through the use of a decimator and down sampler. So we can take the DSD and put it back into 44.1 or 96/24 or whatever comes about.
Pappas: And not lose as much.
Meitner: That’s right.
Pappas: Because the guys who were doing 96/24 and trying to convert it to 44.1 are going to end up tossing something.
Meitner: Well, yes, that’s a nightmare.
Pappas: Well, not if you believe their propaganda.
Meitner: Well, it’s a nightmare. I don’t believe the propaganda.
Pappas: Everybody’s brain is so accustomed to having PCM represent an absolute value, and there are certainly a fair number of naysayers out there who say that you can’t do it.
Meitner: Yes, well, there always is. The thing is, there is an obsession with absolutes, totally forgetting that human sensory inputs are not so much sensitive to absolutes as they are to deltas, and our hearing is really no different. So, you know, this is also one of those philosophical things where PCM is this absolute machine, and DSD is this relative machine. And it’s just better for us as humans. And I firmly believe that general health would be better if PCM would not exist.
Pappas: And why, particularly, is that?
Meitner: Because there is a subliminal irritation about PCM that may just affect the psyches of people in a bad way, and certainly distracts from the pleasure of listening to music. And if listening to music was considered as relaxation and was supposed to be a way to relieve stress, then PCM, like CD playback, certainly doesn’t do it as well as some of the old analogue stuff did.
Pappas: So maybe that’s one of the reason the music industry sales have been down.
Meitner: Possible. Aside from the fact that, right now, it doesn’t seem to be the same scene as I remember from the ‘60s and ‘70s. This is a hard thing to say, but I hear from a lot of people that, with an LP, you used to sit down, close your eyes, and sort of float away with the music, relax and unstress. And with CD, it’s just not the same thing anymore. So even though you might not hear the problems glaring at you immediately, I’m sure they wear.
Pappas: Do you think the other thing might be the fact that when you ran an LP, it was generally about 22 minutes, and then it was time to get up and change it?
Meitner: Well, that could be too. Now with the CD you have the remote control. You can change it at all times. But I find a lot of people don’t even get to 20 minutes.
Pappas: They’re bailing out long before then.
Meitner: Yes. And you know the funny thing is, on top of it, you know all the converter people who started off in the multi-bit scene, have all changed to single bit. Phillips with their bitstream; and look at the vendors of DAC chips and A to D chips and it’s all gone to single bit. You would be hard-pressed today to still find
subjektivisten skrev:AVR4000 skrev:Alla som predikar att "skivor" kommer att ersättas av nedladdning: hur flyttar man data i framtiden?
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Du kan ha 1000 skivor i en ipod idag som är mindre än en plånbok. Påstår du verkligen att detta skulle vara ett problem?
AVR4000 skrev:En iPod är ju långtifrån lika billig att producera som en skiva. Nej, skivor eller andra renodlade lagringsmedier (minneskort, portabla hårddiskar) kommer att finnas kvar i framtiden. Allt kan inte ligga på hårddisken i en musikserver och att säkerhetskopiera till en iPod är ju inte heller en optimal lösning alla gånger.
Orsaken till att skivor "måste" försvinna förstår jag inte. Ser inte felet med att leverera och lagra information på skivor.
AVR4000 skrev:Som billigt lagringsmedia är skivor oslagbara, det skulle möjligen vara om portabla hårddiskar med motsvarande kapacitet eller minneskort når samma produktionskostnad som förhållandet kan ändras.
subjektivisten skrev:Vet inte riktigt vilka du umgås med men väldigt många i min ålder och yngre (dvs 30 och neråt) har musiken på datorn. Dom tycker det är mkt smidigare och tar inte massa plats.
tvett skrev:Och jag förstår att dom tycker att det är mycket billigare![]()
Richard: Vilket format kommer porrindustrin välja?
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