Deang Posted February 6, 2002 Share Posted February 6, 2002 ...have 24 bit/96 khz oversampling i mean - cd's always playback at 44.1 so why the 96 khz spec? ------------------ deanG Quote Link to comment Share on other sites More sharing options...
Ray Garrison Posted February 6, 2002 Share Posted February 6, 2002 There are a lot of benefits proported to oversampling. I think most of them are bogus. One thing would seem to be defendable, however; if you upsample from 44.1kHz to something much higher, then the digital anti-aliasing filter can have a less sharp cutoff, which might produce less phase shift or ringing in the audible portion of the spectrum. ------------------ Music is art Audio is engineering Ray's Music System Quote Link to comment Share on other sites More sharing options...
Audio Flynn Posted February 7, 2002 Share Posted February 7, 2002 I have tried to get through the hype of upsampling. There is allot. I think Sam Tellig of Stereophile called it the "magic bullet". I may beleive in ESP, ETs, many of Steven Hawkings theroys BUT I am not drawn in by magic too easily. The key word is "interpolate". Definition in regard to math from Webster, " to infer the missing terms in a known series of numbers". I never pretend to be a EE; so I try to keep these things simple. The DAC upsampling electronics make a 24 bit word(data point or note) from the 16 bit words in a Red Book CD; a translation of sorts with some opportunity for an undefined error percentage. It sounds like an inference is made to create more than the origonal number of new data points(96-44=52khz approx) before conversion to analog takes place. In academics and engineering studies I have used 5-30 data points to interpolate a only one "manufactured"(magic?) data point. Making something from nothing sounds odd. Ray is right on a ton of stuff. Something bogus is going on which has the potential to distort the music. Reducing the ringing or harshness of a CD is definitely a suitable objective. Creating music from nothing seems illogical. Am on the right track here? Quote Link to comment Share on other sites More sharing options...
mike stehr Posted February 7, 2002 Share Posted February 7, 2002 This post is for no apparent reason. This message has been edited by mike stehr on 02-07-2002 at 06:47 PM Quote Link to comment Share on other sites More sharing options...
mike stehr Posted February 7, 2002 Share Posted February 7, 2002 I can't see how taking the same amount of bit information and doubling it would have benefit other than doubling all the artifacts present in the original bit information, Noise, extra harmonics. I can't understand how oversampling would have anything to do with ringing or harshness, or noise reduction. Doesn't error correction play a role in this? I think oversampling stemmed from the first generation DAC's that were noisy, and used oversampling to help filtering?(I'm not sure on this.) THANX! Quote Link to comment Share on other sites More sharing options...
Deang Posted February 8, 2002 Author Share Posted February 8, 2002 kewl ------------------ deanG Quote Link to comment Share on other sites More sharing options...
Audio Flynn Posted February 8, 2002 Share Posted February 8, 2002 mdeneen, Thanks for the info. For about $ 200 I can get the upsampling board for my MSB Link DAC; it does not seem like a tweak that has allot of downside potential. You cannot buy to wild of a tweak for less than $ 200 these days. Quote Link to comment Share on other sites More sharing options...
badab99 Posted February 9, 2002 Share Posted February 9, 2002 Guys: With all those 200 bucks aint much ...and barely buys that comments.. Just send me 200 bucks apiece and I will um... keep it thanks Quote Link to comment Share on other sites More sharing options...
soundog Posted February 9, 2002 Share Posted February 9, 2002 Here's the explaination of interpolation from Perpetual Technologies. I use their P1A Correction Engine and P3A DAC - makes my CDs sound like SACDs/LPs. http://www.perpetualtechnologies.com/lev1.html ------------------ Soundog's HT Systems This message has been edited by soundog on 02-09-2002 at 11:10 AM Quote Link to comment Share on other sites More sharing options...
SOUNDJUNKIE Posted February 10, 2002 Share Posted February 10, 2002 I didn't understand it either, but I DO have a 15 year old NEC, yes NEC, cd player that's built like a brick s**t-house. JVC had a similar model. It's got seperate P.S. for analog/digital, fibreoptic cabling for critical signal moving to prevent noise pick-up, magetic sheilding like the Texas Instruments type and has hand trimmed D-A at 18bit and samples at 88.2kHz! Perfect for Japanese bluenote CD's and sounds great, even today, with redbook CD's. Too bad the transport opens erratically otherwise I'd modify it a bit and used it alwys. Quote Link to comment Share on other sites More sharing options...
mike stehr Posted February 12, 2002 Share Posted February 12, 2002 Don't give up on that unit, if your vast majority of CD's is redbook then this unit is the best suited. Then you can get a service manual and maybe fix the door/transport problem. I dought if you could get a better player today, unless you jump on the SACD bandwagon, or spend over a grand or more. Sounds like a fun unit to tweak. THANX! Quote Link to comment Share on other sites More sharing options...
SOUNDJUNKIE Posted February 12, 2002 Share Posted February 12, 2002 You know Mike, if I had more time on my hands and hadn't gotten this Dynaco unit I would do a little parts swapping. The problem is I've fixed this thing with the drawer many times before and seen quite a few on ebaY with the same issue. Maybe swapping the transports with another might do it? Then again...there is that Dynaco thing with the 6922's in it. SCHWEEEET! Quote Link to comment Share on other sites More sharing options...
mike stehr Posted February 12, 2002 Share Posted February 12, 2002 Oh I see, you have already delt with it. A service manual would be a nice option. I can see playing with Tubes makes CD player tweaking pretty mundane. but don't give up on it. Quote Link to comment Share on other sites More sharing options...
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