sandyk Posted October 25, 2019 Share Posted October 25, 2019 28 minutes ago, mansr said: Three years later, we still have no information at all about what Keith Johnson actually measured, much less a replication of his experiment. I remember seeing details back then, but did not save them at the time. IIRC, they included Eye patterns and B.E.R. How a Digital Audio file sounds, or a Digital Video file looks, is governed to a large extent by the Power Supply area. All that Identical Checksums gives is the possibility of REGENERATING the file to close to that of the original file. PROFILE UPDATED 13-11-2020 Link to comment
Ralf11 Posted October 25, 2019 Share Posted October 25, 2019 42 minutes ago, mansr said: Three years later, we still have no information at all about what Keith Johnson actually measured, much less a replication of his experiment. experiment?? Link to comment
mansr Posted October 25, 2019 Share Posted October 25, 2019 18 minutes ago, Ralf11 said: experiment?? The one that resulted in a shaky video of a fuzzy projection of a photo of an unmarked scope display showing a slightly blurry line. Link to comment
Ralf11 Posted October 25, 2019 Share Posted October 25, 2019 experiment has a specific definition, and that ain't it Link to comment
STC Posted October 26, 2019 Author Share Posted October 26, 2019 20 hours ago, mansr said: That isn't how light works. As for CD pickups in general, the photodetector is likely most sensitivite around the wavelength of the laser and relative insensitive to green light. Moreover, due to the construction of the optics, only light from a small angle reaches the detector in the first place. Who's talking about the LED working? If it did, all laser assemblies would come with one. Come out with an innovation. Write up some believable story based on some science. Get some positive reviews. Or better still get a group and do a demo. This usually will work even as people just follow what others are sayings. Anyone who has been to the Frank Cheng's resonators should know. New photos coming up. One is Krell without the LED and a Sonic Frontier with locally made DAC module replacing a faulty "no longer in production" original module. ST My Ambiophonics System with Virtual Concert Hall Ambience Link to comment
Popular Post Summit Posted October 26, 2019 Popular Post Share Posted October 26, 2019 23 hours ago, The Computer Audiophile said: Nerds 😁 Superdad, tmtomh and kumakuma 1 2 Link to comment
fas42 Posted October 26, 2019 Share Posted October 26, 2019 4 hours ago, Summit said: Speaking of such 'animals', can't resist pointing to some prime bacon ... http://www.basspig.com/. Link to comment
STC Posted November 2, 2019 Author Share Posted November 2, 2019 DCS Scarlatti CD transport now after replacing the tray belts. The CD loader is VRDS from Esoteric. Just US$33000. With plenty of screws to keep everything secure. ST My Ambiophonics System with Virtual Concert Hall Ambience Link to comment
sandyk Posted November 2, 2019 Share Posted November 2, 2019 ST Do those little sealed motors often need replacing, or lubricated ? Alex How a Digital Audio file sounds, or a Digital Video file looks, is governed to a large extent by the Power Supply area. All that Identical Checksums gives is the possibility of REGENERATING the file to close to that of the original file. PROFILE UPDATED 13-11-2020 Link to comment
STC Posted November 2, 2019 Author Share Posted November 2, 2019 Just a drop of oil at all moving parts in the transport. sandyk 1 ST My Ambiophonics System with Virtual Concert Hall Ambience Link to comment
STC Posted November 6, 2019 Author Share Posted November 6, 2019 Original CD Player Hugo9000 1 ST My Ambiophonics System with Virtual Concert Hall Ambience Link to comment
STC Posted November 6, 2019 Author Share Posted November 6, 2019 Go hear to hear the Original Sound 😂 ST My Ambiophonics System with Virtual Concert Hall Ambience Link to comment
STC Posted November 6, 2019 Author Share Posted November 6, 2019 Missed two... ST My Ambiophonics System with Virtual Concert Hall Ambience Link to comment
Popular Post mansr Posted November 6, 2019 Popular Post Share Posted November 6, 2019 5 hours ago, STC said: Where does one get 24-bit CDs to play on this beast? Superdad and tmtomh 1 1 Link to comment
sandyk Posted November 6, 2019 Share Posted November 6, 2019 11 hours ago, mansr said: Where does one get 24-bit CDs to play on this beast? Mansr There are numerous releases on HD Tracks etc, that are in 24/44.1 format. Would it be possible to burn them to a normal CD-R ,both in the Recording studio and at home, and play them on a player such as this one ? How a Digital Audio file sounds, or a Digital Video file looks, is governed to a large extent by the Power Supply area. All that Identical Checksums gives is the possibility of REGENERATING the file to close to that of the original file. PROFILE UPDATED 13-11-2020 Link to comment
mansr Posted November 6, 2019 Share Posted November 6, 2019 17 minutes ago, sandyk said: Mansr There are numerous releases on HD Tracks etc, that are in 24/44.1 format. Would it be possible to burn them to a normal CD-R ,both in the Recording studio and at home, and play them on a player such as this one ? An audio CD has 16 bits per sample, no more and no less. If you somehow put 24-bit data onto a CD, standard players won't be able to play it. Link to comment
sandyk Posted November 6, 2019 Share Posted November 6, 2019 9 minutes ago, mansr said: An audio CD has 16 bits per sample, no more and no less. If you somehow put 24-bit data onto a CD, standard players won't be able to play it. Agreed, but I was asking about players such as this one. The CD-R would be a Data disc. How a Digital Audio file sounds, or a Digital Video file looks, is governed to a large extent by the Power Supply area. All that Identical Checksums gives is the possibility of REGENERATING the file to close to that of the original file. PROFILE UPDATED 13-11-2020 Link to comment
Popular Post Miska Posted November 7, 2019 Popular Post Share Posted November 7, 2019 1 hour ago, mansr said: An audio CD has 16 bits per sample, no more and no less. If you somehow put 24-bit data onto a CD, standard players won't be able to play it. That was a HDCD player? Somewhat similar to what MQA is trying again now. Practically means that the decoder/upsampling filter outputs 24-bit: http://tech.juaneda.com/download/PMD100.pdf IOW, not much different from other regular CD players apart from the HDCD peak extension feature. P.S. These old digital filter chips are at least as good or better than what you can these days find in best DAC chips... Solstice380, STC and Jud 1 1 1 Signalyst - Developer of HQPlayer Pulse & Fidelity - Software Defined Amplifiers Link to comment
STC Posted November 7, 2019 Author Share Posted November 7, 2019 McIntosh C28 preamp. Added a cap in parallel to the weak 3 series cap since the original caps were not readily available. Keeping fingers crossed that the sound didn’t change. Hugo9000 1 ST My Ambiophonics System with Virtual Concert Hall Ambience Link to comment
Popular Post STC Posted November 7, 2019 Author Popular Post Share Posted November 7, 2019 And another McIntosh C20. Hugo9000 and tmtomh 2 ST My Ambiophonics System with Virtual Concert Hall Ambience Link to comment
fas42 Posted November 7, 2019 Share Posted November 7, 2019 4 hours ago, Miska said: That was a HDCD player? Somewhat similar to what MQA is trying again now. Practically means that the decoder/upsampling filter outputs 24-bit: http://tech.juaneda.com/download/PMD100.pdf IOW, not much different from other regular CD players apart from the HDCD peak extension feature. P.S. These old digital filter chips are at least as good or better than what you can these days find in best DAC chips... Yes, the chasing of more impressive numbers has gone on forever - obviously, the bigger the number, the better 😉 - my original Yamaha CD player had "20 bits!" splashed over all the promo material, in the largest font; you had to dive into the fine print to appreciate it was talking of the volume control ... luckily, those more gung ho technical accomplishments didn't get in the way of delivering good sound 🙂. Link to comment
Popular Post Miska Posted November 7, 2019 Popular Post Share Posted November 7, 2019 3 hours ago, fas42 said: luckily, those more gung ho technical accomplishments didn't get in the way of delivering good sound 🙂. Good sound is result of technical accomplishment... Teresa, Ralf11 and Solstice380 3 Signalyst - Developer of HQPlayer Pulse & Fidelity - Software Defined Amplifiers Link to comment
Popular Post kumakuma Posted November 7, 2019 Popular Post Share Posted November 7, 2019 11 hours ago, fas42 said: Yes, the chasing of more impressive numbers has gone on forever - obviously, the bigger the number, the better I agree. 5691 posts since you joined on April 27, 2017 is impressive. Ralf11, Jeff_N and fas42 1 2 Sometimes it's like someone took a knife, baby Edgy and dull and cut a six inch valley Through the middle of my skull Link to comment
fas42 Posted November 7, 2019 Share Posted November 7, 2019 14 hours ago, Miska said: Good sound is result of technical accomplishment... Which is why I prefixed the phrase with "gung ho" 🙂 - isn't it Chord who talks of -160dB or something noise levels being addressed - this is truly in the realm of imaginary do-gooding ... IME, all the problems lie roughly in the 70-80 dB down area - that's where the action is, if one is chasing best sound. pkane2001 1 Link to comment
Miska Posted November 7, 2019 Share Posted November 7, 2019 14 minutes ago, fas42 said: Which is why I prefixed the phrase with "gung ho" 🙂 - isn't it Chord who talks of -160dB or something noise levels being addressed - this is truly in the realm of imaginary do-gooding ... IME, all the problems lie roughly in the 70-80 dB down area - that's where the action is, if one is chasing best sound. But not any better stop-band attenuation than the PMD chip in question here... Signalyst - Developer of HQPlayer Pulse & Fidelity - Software Defined Amplifiers Link to comment
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