影音天地主旨 ﹝請按主旨作出回應﹞  下頁  尾頁 寄件者 傳送日期 由舊至新 由新至舊
[#15] Blogs: 數碼音樂重播專欄 (1)    
Bondy
ackcheng
個人訊息 正式會員
112.xxx.xxx.59
2011-04-28 00:47
[#16] Blogs: 數碼音樂重播專欄 (1)    
Lossless CAS platform is definitely the furture of music format but there are a very big risk.....that's how to prevent the illegal copy of such music files. The industry should have a scheme to prevent a second copy such as the SCMS (The Serial Copy Management System) as DAT adopted before.
mcc_2001
個人訊息 正式會員
165.xxx.xxx.150
2011-04-29 18:25
[#17] Blogs: 數碼音樂重播專欄 (1)    
The topic of illegal copying has been considered for some time by record labels in the music industry. More and more of them are offering high resolution tracks online. Why are they not as worried now as before about illegal copying? One answer is that experience has shown such infringement has not proliferated. Another answer is that copying and sending high resolution tracks around is physically prohibitive. Imagine an album of DXD produced by 2L of Norway has a file of 8 GB, about 1 GB per track, 8 tracks per album. A youngster with a PMP or iPod will decline taking it even if his friend offers it to him because his storage capacity will be overloaded. Alright a 24/96 track only has one quarter the size but is still substantial for his machines. And no one will send it around in mails even if there is capacity for the attachment because the uploading and downloading takes unduly long time. Yes, MP3 tracks are still being copied and sent around but because the price is much cheaper than CD, some prefer to buy selected tracks rather than wait for them to come somewhere.
Incorporating Digital Right Management as suggested is likely to kill high resolution sales because invariably it affects the sound. This will be a stupid move by the industry and there was already prior lesson.
momei
個人訊息 正式會員
203.xxx.xxx.68
2011-04-29 19:33
[#18] Blogs: 數碼音樂重播專欄 (1)    
CAS = "Computer As Source" ?! Where did you learn this? @@"

I only know CAS as "Computer Audio Source"

OMG. So surprising an "audio professional" (although only self-proclaimed) making this mistake.
sjyw
個人訊息 正式會員
116.xxx.xxx.224
2011-04-30 13:27
[#19] Blogs: 數碼音樂重播專欄 (1)    
Says who?

Like many acronyms, the term CAS is informally invented by people for pure convenience for the benefits of quick communication. AS far as I know, this is mostly a Hong Kong/Asia term. Countries with English as second or third language tend to make up short forms for convenience. It is not as commonly used by the American/UK audio press for instance.

For all I know, CAS could be "Computer Assisted Surgery" or thousands other representations. So to laugh as someone as being "wrong" about an informally spread term is silly. Just because someone else mentioned it before does not make it the official term.

As far as I am concerned, "Computer Audio Source" does not sound right in English anyway. To me, "Computer based Audio" sounds better; "Computer as Source" also "gels" better grammatically.

agentsmittie
個人訊息 正式會員
219.xxx.xxx.6
2011-04-30 14:04
[#20] Blogs: 數碼音樂重播專欄 (1)    
The term CAS.
I first learned about it in Kent Poon's web, HiFitrack and Design With Sound. It stands for computer as source.
Then I came across the term elsewhere that is supposed to mean Computer Audio System.
Then we have the web Computer Audiophile.
It is not in Wikipedia.
The "C" stands for computer, that is, using it or a varied form of it, for example, a storage system or a server to play digital tracks.
momei
個人訊息 正式會員
218.xxx.xxx.88
2011-04-30 14:44
[#21] Blogs: 數碼音樂重播專欄 (1)    
CAS for computer audio playback not really a standardized or academic abbreviation, no absolute right or wrong term, actually calling such playback based on studio master file from download, can be play back by mobile phone, memory player, universal transport, network streamer and of course computer, as "file based audio playback".

probably a few years later, broadband speed and cost much lower, cloud computing and storage (what amazon doing now), we don't have to purchase physical media or file anymore, we may purchase audio/video subscription fee based on usage or quality (24/96 or above premium quality, 16/44 CD quality and mp3 lossy), you can access to all media stored on server, streaming to device by wifi/3g, so the content not require to store, or not allow to be store and re-transfer (well, if the subscription allow to access all media, why taking extra effort?), just access to playlist and ready to go!!

Last.fm is doing so, just not reaching audiophile quality yet, until records company willing to release Hi-Rez source.
hercules
個人訊息 正式會員
202.xxx.xxx.106
2011-04-30 15:06
[#22] Blogs: 數碼音樂重播專欄 (1)    
"""AS far as I know, this is mostly a Hong Kong/Asia term. Countries with English as second or third language tend to make up short forms for convenience. It is not as commonly used by the American/UK audio press for instance."""

totally agree. at first when i encountered this term i had no idea what it was.

traditionally computer is the cpu with other items put in one box. these other items like sound card, memory hard disks or storage media are peripherals. one can stores data from a remote storage device and that can be the source. so computer as source is misleading.

i can see the trend will go with pay as you play on demand. it is more like renting instead of owning the software. who still want to have piles of cds and keep your library showing locations/numbering.

there are many software which may help split big wav or flac files using splitter or cue. split files can be transfer to dvd discs as data and then rejoin together at later stage.

最後修改時間: 2011-04-30 15:36:16
cpu8088
個人訊息 正式會員
115.xxx.xxx.214
2011-04-30 15:32
[#23] Blogs: 數碼音樂重播專欄 (1)    
Korea HiFi show system.

DWS
個人訊息 正式會員
117.xxx.xxx.150
2011-04-30 17:00
[#24] Blogs: 數碼音樂重播專欄 (1)    
System 2

DWS
個人訊息 正式會員
117.xxx.xxx.150
2011-04-30 17:01
[#25] Blogs: 數碼音樂重播專欄 (1)    
Dynaudio with Linn

DWS
個人訊息 正式會員
117.xxx.xxx.150
2011-04-30 17:16
[#26] Blogs: 數碼音樂重播專欄 (1)    
JBL with Mark Levinson

DWS
個人訊息 正式會員
117.xxx.xxx.150
2011-04-30 17:20
[#27] Blogs: 數碼音樂重播專欄 (1)    
.

DWS
個人訊息 正式會員
117.xxx.xxx.150
2011-04-30 17:21
[#28] Blogs: 數碼音樂重播專欄 (1)    
Wilson with Meridian

DWS
個人訊息 正式會員
117.xxx.xxx.150
2011-04-30 17:22
[#29] Blogs: 數碼音樂重播專欄 (1)    
i hate to ask this question " can computer audio source (cas) really win cd transport for dac?"
batmanames04
個人訊息 正式會員
124.xxx.xxx.173
2011-04-30 17:40
[#30] Blogs: 數碼音樂重播專欄 (1)    
I don't invent the term. I didn't know what it means at the first time, nor understand why someone would like to make scene of it.

CAS to me has been "民安隊". I also heard Eric (Editor of AV Magazine) mentioned it. Our government has a web page: www.cas.gov.hk.

People I met (consumer audio world) speaks it as "CAS System". At the first time I thought they mean "CARS System". Singapore, Malaysia audiophiles all speaks this way. They do not pronounce as independent C. A. S. system but "CAS".

I agree cloud base music library will become the majority of mass culture too.

Computer Audio System
Computer As Source
Computer Audiophile System
Computer Audio Server

as you like.




DWS
個人訊息 正式會員
117.xxx.xxx.150
2011-04-30 17:53
[#31] Blogs: 數碼音樂重播專欄 (1)    
" can computer audio source (cas) really win cd transport for dac?"

u are asking if 16/44 cds can win over 24/88 96 176 192 and above.

theoretically the higher the bit rate and length the closer towards continuous analog as there are less gaps for the algorithms to do the guess work.

similarly in video u are comparing 576i dvd quality with 1080p blu ray video quality. if u consider 1080p better than the 480 or 576 output then the same principle applies to audio too.



最後修改時間: 2011-04-30 22:49:13
cpu8088
個人訊息 正式會員
115.xxx.xxx.214
2011-04-30 22:47
[#32] Blogs: 數碼音樂重播專欄 (1)    
hey, I mean cas comparing with cd transport playing 16/44.1 to dac


one more thing, our human ears cannot hear more than 20khz sound , why 24.96 (around 48khz) sound better than 16/44.1?
batmanames04
個人訊息 正式會員
61.xxx.xxx.217
2011-05-01 06:28
[#33] Blogs: 數碼音樂重播專欄 (1)    
one more thing, our human ears cannot hear more than 20khz sound , why 24.96 (around 48khz) sound better than 16/44.1?

----------------------------------------------------

If you treat PCM is sampling (snapshot) of analog waveform, at audible frequency, let said 4Khz, 96Khz have double number of sample compared with the one at 44khz sampling rate, more true to original analog waveform.

Secondly, the Low Pass Filter roll off will push beyond 22khz to 48khz @ 96 sampling frequency, the sound deterioration near the top end (16-20Khz) of the audible range, the sound quality may improve.



最後修改時間: 2011-05-01 09:13:12
hercules
個人訊息 正式會員
112.xxx.xxx.58
2011-05-01 09:11
[#34] Blogs: 數碼音樂重播專欄 (1)    
there are many theories about hearing beyond 20khz

here is a good read

http://www.earthworksaudio.com/wp-content/uploads/th_world_beyond_20khz.pdf
cpu8088
個人訊息 正式會員
115.xxx.xxx.214
2011-05-01 09:27
主旨內容一共有 6 頁,每頁顯示 20 個信息,選擇頁數:  下頁  尾頁
按照傳送日期顯示:由舊至新由舊至新  由新至舊由新至舊
最新資訊 - 市場
香港高級視聽展2024年8月9-11日 2024-12-14

最新資訊 - 市場
百搭高級音響有限公司The Sound Chamber 2024-12-14

最新資訊 - 汽車
XPENG G6 化身大熊貓迎接香港大熊貓家族新成員 2024-12-13

最新資訊 - 影音
Creative 推出全新小型 USB 喇叭 Pebble Nova 2024-12-12

最新資訊 - 影音
SOULNOTE 推出專為分離電源光學唱頭輸入設計的唱臂線「RPC-1D」與「RPC-1R」 2024-12-11

最新資訊 - 影音
MQA 發布全新高音質技術「QRONO」:包括提升 DAC 性能的「QRONO d2a」與 DSD-PCM 轉換的「QRONO dsd」 2024-12-10

最新資訊 - 影音
Fostex 推出全新號角超高音單體 T90A-ST 2024-12-09

最新資訊 - 影音
519期音響技術 - WADAX Atlantis Reference Transport 2024-12-09