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| [#44] Blogs: 數碼音樂重播專欄 (1) My DIY DAC hear almost no different between 16 44.1 and 24/96 material if they are derived from the same source |
batmanames04 正式會員61.xxx.xxx.217 |
2011-05-02 20:02 | |
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| [#45] Blogs: 數碼音樂重播專欄 (1) if you believe nyquist theorm, a good dac should hear no big different bewteen 16 44.1 and 24 96 material ( provide they are from the same source)  |
batmanames04 正式會員 61.xxx.xxx.217 |
2011-05-02 20:16 |
| [#46] Blogs: 數碼音樂重播專欄 (1) 1996 thats 15 years ago. there was no diamond beryllium or other tweeters with exotic materials. could those old tweeters output properly the frequencies above 20khz? how good was the room treatments for the tests? if it was one that absorbed a lot of high frequencies of course there was less chance to hear properly. |
cpu8088 正式會員 115.xxx.xxx.214 |
2011-05-02 21:10 |
| [#47] Blogs: 數碼音樂重播專欄 (1) """a good dac should hear no big different bewteen 16 44.1 and 24 96 material""" i must be wrong. how can a dac hear things? i thought human can hear but a dac? |
cpu8088 正式會員 115.xxx.xxx.214 |
2011-05-02 21:11 |
| [#48] Blogs: 數碼音樂重播專欄 (1) from wiki: Theorems have two components, called the hypotheses and the conclusions. The proof of a mathematical theorem is a logical argument demonstrating that the conclusions are a necessary consequence of the hypotheses, in the sense that if the hypotheses are true then the conclusions must also be true, without any further assumptions. The concept of a theorem is therefore fundamentally deductive, in contrast to the notion of a scientific theory, which is empirical. |
cpu8088 正式會員 115.xxx.xxx.214 |
2011-05-02 21:32 |
| [#49] Blogs: 數碼音樂重播專欄 (1) Batmanames04, Merely to mention the view of Bill Schnee to balance that of Bob Katz who is associated with Daniel Weiss. Bill advocates 24/192. In my book I have heard and read about Bill Schnee more than Bob Katz though I do not know in reality who is more famous. Anyway, back to the subject matter. If you use a PC and Foobar 2000 or WASAPI, then I get stuck because I have never used them. If you use MAC and iTunes then follow test 1 below. Test 1: You need to open MIDI, play a track of 24/96 and check whether you have set your computer to recognize you DIY DAC and also whether the setting displays 24/96 and not 16/44.1 whilst you play the 24/96 track. If the recognition and setting remains at 16/44.1, then it means you have always played your 24/96 tracks at 16/44.1, thus you heard no difference. If you have already done this previously and the recognition and setting is correct, please come back for test 2. |
momei 正式會員 203.xxx.xxx.61 |
2011-05-02 22:25 |
| [#50] Blogs: 數碼音樂重播專欄 (1) try to audition a high end DAC, your ears can hardly distinguish 16 44.1 and 24 96 recordings |
batmanames04 正式會員 61.xxx.xxx.217 |
2011-05-02 22:26 |
| [#51] Blogs: 數碼音樂重播專欄 (1) momei I am using PC with foobar kernel streaming mode and the screen showing sampling rates16 44.1 and 24 96. |
batmanames04 正式會員 61.xxx.xxx.217 |
2011-05-02 22:31 |
| [#52] Blogs: 數碼音樂重播專欄 (1) If the file is playback from computer then the sound quality maybe affected by the quality of the computer. I think that it is better to record the same sound with original file in 16bit/44.1Khz and 24bit/96khz into a CD then play it by a CDP. |
DYreal 正式會員 113.xxx.xxx.158 |
2011-05-02 22:36 |
| [#53] Blogs: 數碼音樂重播專欄 (1) then it will be comparing cdp vs pc, not a good control experiment may be you can use pioneer dv ax 10 universal player output 16/44.1 and 24/96 for comparison |
batmanames04 正式會員 61.xxx.xxx.217 |
2011-05-02 22:49 |
| [#54] Blogs: 數碼音樂重播專欄 (1) CPU8088, Regarding beryllium tweeters: not intending to challenge you but merely to tell you the fact. In the 70's Yamaha already made beryllium tweeter for its NS1000 loudspeakers. They were available in Hong Kong and some audiophiles bought them. The Yamaha tweeters are distinguishable from that of current Focal ones in that the Y ones are convex whereas the F ones are concave. I have read posts here about your undue favour towards Focal speakers. Could you tell us what process Focal uses to make the tweeters? Vapour deposition or what? Apparently the Focal tweeters are thinner than the Yamaha ones. I do not have information what process Yamaha used and I guess it might be heat formation, that is, putting the metal powder in a mould and heat it to the melting temperature in an oven. Talking about Focal Utopia, I suspect, based on what I deduced from listening, the tweeter has dispersion restrictions merely because of the design of the tweeter cabinet that has the width and depth the same as the woofer cabinet. Other designs such as the Karma Exquisite, the KEF Fat Lady all have the tweeter housing tapered to the smallest size to help dispersion. Or in the B&W and Tannoy Royal designs, place it on top. |
momei 正式會員 203.xxx.xxx.61 |
2011-05-02 23:01 |
| [#55] Blogs: 數碼音樂重播專欄 (1) this thread is about digital music not tweeters anyway yamaha of the old was using beryllium vapour deposit not pure beryllium what focal is doing. the diamonds of b and w and kharma are vapour deposits with diamond flakes bond together. dispersion pattern, baffle and cabinet designs are different subjects. what i questioned was what speakers used in 1996 for the test to output over 20khz? |
cpu8088 正式會員 115.xxx.xxx.214 |
2011-05-03 09:53 |
| [#56] Blogs: 數碼音樂重播專欄 (1) but most 33 members know you like jm lab beryillium tweeter |
batmanames04 正式會員 180.xxx.xxx.233 |
2011-05-03 10:47 |
| [#57] Blogs: 數碼音樂重播專欄 (1) a CD contains 16 bit samples with a 44.1 kHz sample rate. this allows theoretically for a dynamic range of 16*6= -96 dBFS and 44.1/2 = 22.05 kHz as the highest possible frequency. recordings are often made with a greater bit depth (24) and a higher sample rate. one of the benefits of computer based audio is that you are not in need of recordings down sampled to CD format. uou can play the original recording at its original bit depth and sample rate (if your sound card allows for it). a 24/96 recording allows for a dynamic range of 24*6= -144 dBFS. this sounds impressive but CD’s -96 dBFS is very soft and the noise floor of your gear e.g. -110 dBFS will be the limiting factor. probably listening to the decay of instruments might reveal a subtle difference. 96 kHz has a Nyquist frequency of 48 kHz. Sounds impressive too but our hearing may stop somewhere at 20 kHz (when we are young). there are reasons why a hi-rez recording will sound different. 1) Down sampling might introduce artifacts. 2)our tweeters can sound different when modulated with signals 20 kHz. often no audible differences between CD audio and higher resolutions are reported on the internet. similarly some claim no audible differences between CD audio and high bitrate MP3. as 1+1=2 some conclude that there isn’t a difference between MP3 and Hi-rez audio! |
cpu8088 正式會員 115.xxx.xxx.214 |
2011-05-03 10:52 |
| [#58] Blogs: 數碼音樂重播專欄 (1) 2)our tweeters can sound different when modulated with signals 20 kHz. ???? |
batmanames04 正式會員 180.xxx.xxx.251 |
2011-05-03 13:04 |
| [#59] Blogs: 數碼音樂重播專欄 (1) similarly some claim no audible differences between CD audio and high bitrate MP3 ??? (can mp3 reach 20khz bandwidth |
batmanames04 正式會員 180.xxx.xxx.251 |
2011-05-03 13:05 |
| [#60] Blogs: 數碼音樂重播專欄 (1) Batmanames04, It seems better for me to know a bit more about your DIY DAC and the tracks you used by which you found no difference than to ask you to go straight into Test 2. Does your DAC support 24/192 or even DXD? Does your computer out port support 24/192 and what interface or connector you use to play those tracks? The port and interface could be bottle necks and is 24/192 shown on the monitor screen to confirm such resolution is being played? I am trying to see whether by listening to 24/192 you may be able to hear the difference. Also please list two to three tracks you used previously, the source and the genre (type of music). I forgot where I read about the story. Morten Lindberg (proprietor of the 2L label in Norway) took some of his tracks to the US to meet up with equipment manufacturers and importers and played them two different resolutions. At the end they all preferred the higher resolution version and took copies of those. 最後修改時間: 2011-05-03 13:34:28 |
momei 正式會員 203.xxx.xxx.61 |
2011-05-03 13:33 |
| [#61] Blogs: 數碼音樂重播專欄 (1) 我打做我的 digital to analog converter by using analog device sample rate converter . it means it upsample all kinds of 16/44 or 24/96 sample rate to around 96khz. momei hing please try to listen guitar fever track 3 and track 4 cdr version and hires version with your mac  |
batmanames04 正式會員 124.xxx.xxx.26 |
2011-05-03 14:39 |
| [#62] Blogs: 數碼音樂重播專欄 (1) momei if you like hear no big different with your dac, you need to provide low jitter source to your dac please install amarra into your mac, the software can provide much low jitter source |
batmanames04 正式會員 124.xxx.xxx.26 |
2011-05-03 14:43 |
| [#63] Blogs: 數碼音樂重播專欄 (1) what dac are you using right now? |
batmanames04 正式會員 124.xxx.xxx.26 |
2011-05-03 14:46 |
