- #81 [dawnoflp], 23-01-25 23:59
- #82 [myml], 23-01-26 00:05reply #81
請你先完成這個話題,好嗎?
( 你同意黑膠唱片比CD失真嗎 ?) - #83 [myml], 23-01-26 00:12reply #81
說到重點時, 為何你總是支吾以對 ? 這不是胡吹,又是甚麼? -
- #84 [dawnoflp], 23-01-26 00:14好,敢問樓主貼文寫甚麼? >>>聽黑膠唱片是傻瓜嗎?
你應貼文寫:黑膠唱片聲音失真 - #85 [myml], 23-01-26 00:20reply#84
這個貼子是那些自命音樂發燒友明知道黑膠唱片比CD失真,
還去花大量金錢去購買黑膠唱片來聽,不是傻瓜又是甚麼?
最後修改時間: 2023-01-26 00:21:46 - #86 [myml], 23-01-26 00:27reply #81
唱針必須畫過唱片表面,才能夠讀取到刻錄的波型(聲音),而在這個過程中,唱頭,音臂傳動等部件都會產生各種各樣的機械振動,影響最終的聲音,空氣中無處不在的灰塵也會逐漸佈滿唱片的表面。更糟糕的是唱片的硬度必然不如唱針,
因此無論你怎麼小心,每次播放還是會帶來一定的磨損黑膠系統,直到黑膠生命完結,所以很多人說,聽黑膠唱片,聽一次,失真一次,就是這個解釋
相信閣下沒有聽說過上述的理論,否則又怎會來這裡出洋相 - #87 [dawnoflp], 23-01-26 09:49cd唔會失真???
唔好笑大人地過口呀!!!
當你聽緊音樂時44.1d訊息可能少咗二粒0或1你唔知㗎,眼睇唔到,耳又聽唔出 - #88 [dawnoflp], 23-01-26 10:15自我改正#87:當你聽緊音樂時44.1d訊息可能少咗二粒你唔知㗎,眼睇唔到,耳又聽唔出
最後修改時間: 2023-01-26 10:17:50 - #89 [myml], 23-01-26 11:24reply #87/88 dawnoflp
閣下這個廉價分身沒有說話講了嗎? 你不感到羞恥嗎?
勸告閣下沒有墨水就不要扮學者. 哈哈 - #90 [dawnoflp], 23-01-26 11:54一個自欺欺人嘅傻佬,你對住幅墻慢慢自我討論啦
88
最後修改時間: 2023-01-26 12:01:41 - #91 [myml], 23-01-26 12:12reply #90 dawnoflp
我等候閣下開多幾個分身,讓我開心,開心
最後修改時間: 2023-01-26 12:13:33 - #92 [calbee1128], 23-02-03 01:16
取樣頻率,學名Sample Frequency,意是將音響「切粒」的每秒粒數。44.1KHz 的 CD 取樣頻率,即是 CD 碟的數碼「樣本化」規格,是每秒鐘將音響切成 44,100 粒,每粒謂之一個樣本(Sample)。
由此推算,16bit/44.1kHz取樣的每秒鐘脈衝流量,便是 16 x 44,100 x 2(聲道)= 1,411,200bits/sec。而 16bit 字每秒鐘能夠提供 216 = 65,536 級不同的電平變化。
這每秒一百四十多萬字長(Word Length)的脈衝,印在 12cm 直徑的銀面金屬片上(也有金面),用鐳射管拾訊方式檢定 0 或 1 脈衝,鐳射管由碟內周開始閱讀「進入」資料(access data),碟的轉速是由內圍的 500rpm 經由伺服控制遞減至圓邊的 200rpm,讓鐳射管在恆速(Constant Speed)狀態下每秒鐘閱讀同樣距離、同樣數量的資訊;鐳射光射在 CD 表面上,將 0 與 1 的資訊反射至一面集訊鏡上,閱讀工作便告完成。
反射鏡所搜集到的資訊,理論上是應該 100% 與印在 CD 上的毫無分別。而印在碟上的東西又應 100% 和印版毫無分別……如此引申至和被切粒(量子化)之前的音源 100% 毫無分別。可惜事實上絕非如此,無論 Analog 或 Digital 軟件,其最終階段成品必然產生失真。Analog 失真是波形之各式畸變,Digital 失真是脈衝訊號之失落。前者聽在耳朶裏是有失真的音響,而後者却無法令到 D > A 解碼器正常操作,還原為「一條條」的 Analog 聲響。 - #93 [myml], 23-02-03 03:10reply #92
相信你也用了不少時間尋找資料,我不是甚麼專業人士,亦只是查看互聯網,擁有黑膠唱片及CD 在家中作對比,
才得出結論,既然你有這方面興趣,大家不妨研究一下..
原始聲音經過錄音系統再次播放出來亦可能會失真,問題在於製成品後那樣失真較多,這個就是重點, - #94 [myml], 23-02-10 05:08今天有空去清潔一些舊黑膠唱片,怎知道弄了數分鐘,黑膠唱片掉下一小片出來,看清楚後,
發覺可能是以前曾掉過地上加上黑膠唱片老化,想當年購買黑膠唱片,今天又做了傻瓜.. - #95 [fotheringay], 23-02-10 06:51Houses will get older and deteriorated.
Cars will get older, less efficient and even need yearly service and parts replacements to keep it running.
Clothes from designer labels cost hundred times more than from Primark but last more or less the same time.
£400 a bottle of red wine tastes the same to me from a £8 one which can be bought in local supermarket.
Believe or not, CD's also get fungus and scratches and deemed unusable.
Are we all fools?
最後修改時間: 2023-02-10 06:52:46 - #96 [myml], 23-02-10 07:58reply#95
最低限度,我現在的可愛CD是沒有問題 - #97 [fotheringay], 23-02-10 08:23
That's good. Make sure it will last.
The 1.0.1.0. may last forever but the hardware(CD materials themselves) may not be able to.
I.O.I.O..............
最後修改時間: 2023-02-10 08:27:14 - #98 [myml], 23-02-10 11:47reply #97
( the hardware(CD materials themselves) may not be able to. )
為何如此,可否說明? - #99 [fotheringay], 23-02-10 18:03CD's(including the CD, booklet and case) are prompt to sunlight and humidity.
If your CD's are stored in a damp environment the booklet may have mildew or even molds. If it gets in touch with the CD printing side molds may spread to the CD. It happens to me.
I could clean off the molds from the surface with aqueous based cleaning fluid but nothing I can do with those CDs suffered from molds eaten underneath the printings.
Some are ok to play but some not.
Also, some CD's look clean and no scratch from the silver side(the playing side) but still jumping. Most of the time it's to do with the damage to the printing side.
And I quote from EMI;
" — A spokesperson for EMI, commenting on research done on the permanence of compact discs by the record label Nimbus in 1988. Nimbus, the first CD manufacturer in the UK, said that it had done some research into the disc rot issue and found that most discs will self-destruct after between eight and 10 years. The company's findings, which went against prevailing theories of the time that CDs were indestructible, blamed the problems on improper dyes that reduced the quality of the discs. As highlighted by the quote, record companies were at first skeptical, but Nimbus' concerns about disc integrity turned out to be important and true."
- #100 [myml], 23-02-10 22:58reply#99
你給A spokesperson for EMI這個傢伙誤導了,
看來你不明白甚麼稱為CD, 讓我告訴你的真實情況罷,我擁有4000張(包括VCD, DVD,BLURAY)光碟,
有一些已經存放超過35年, 你提及到那個不知名的傢伙識少少,做代表,他提到的問題我現在逐一反駁..
1) 不要說一張弱小的CD,就算是不綉鋼,不好好保護,也會變質..
2) 早期的製造CD事業技術可能不太成熟,至有一些不良產品出現,但這是極少極少數,主要是一些買賣二手的小販把一些舊CD翻新才有那位扮代表的描述事件,另外一些CD-ROM 質素差,你買回來燒錄資料保存就不會長久,正常情形下,你要購買正版CD,才可以大幅避免以上事件發生,可明白否?? - 下一頁 (5 of 7)
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有d嘢你聽唔入耳就話人胡吹,又唔列出你黑膠糸統為何聽Lp易失真,呢度大把C兄比到意見改善
最後修改時間: 2023-01-26 00:07:48