為什麼有些發燒友害怕測量？

[wu61]

集資弄一台設備給有出錢的玩，是不錯的作法
平常就當my-hiend的設備

有意思 , 很不錯想法算我一份

[Leo Yeh]

測什麼？
都可以呀，看看能有什麼結果 :)

之前看雜誌，好像都說拿來做空間EQ用...而且都還說這東西好得很...
歷史悠久的事了，搞不清楚了...

又，關於FM Acoustics，劉漢盛總編下的標題是"希望能有平價的頻率響應曲線補償與雙擴大機療法"...
內容也不是針對錄音，而是針對空間，
他老大顯然用的挺愉快勒...給了"石破天驚之聲！"的評價...

這二套我連見都沒見過，完全沒概念...
總覺得EQ拿來用在空間校正不是挺好...

聽某張錄音要是很糟糕，我會選擇先懷疑自己的系統是否沒搞好勒...
若是某些很明顯的真的很糟糕的錄音（前陣子聽老搖滾有好幾張...），我也就認了，就當做了解當時的錄音風格或極限。
要自己調整？怎麼調啊...還真累...就是因為是懶人，才會用CD，現在全丟進PC裡，連翻CD都懶囉...
又，若是用iTunes，可以針對每一首調EQ，還能存下來，之後自動套上

回正題，小葉打算測啥勒？
振幅/相位頻率響應？impulse response？TIM？THD？Water fall？
或許該回頭來先問問，目的是想分辨什麼呢？
這才能決定該測啥吧？

[Leo Yeh]

andychu買一台最貴的捐出來
我們出資買一台簡單隨身的....

[999369]

Testing LoudspeakersHOME/SOLUTIONS/LOUDSPEAKERS

Speaker testing is challenging because extraneous noises and reflections from surrounding walls and floors interfer with the acoustic measurements. The ideal testing setup is a dedicated acoustic tester in an anechoic chamber (or a remote, windless location such as a desert), where there are no reflections or other disturbances. However, the cost and time for this kind of setup is impossible to justify for the vast majority of engineers, especially if the need is only occasional.
Most engineers who want to make acoustic measurements wish to do so in their lab, or even on a noisy production line. For these situations, two main techniques have been developed to negate the effect of reflections: MLS and time gated log chirp (continuous sweep).
Setting up an acoustic test
Setting up an acoustic test is the biggest challenge in measuring loudspeakers because it's hard to determine exactly when the first reflection hits the measurement microphone (and thus pollutes all subsequent signals). The latest APx software uses drag and drop cursors on an Energy Time Graph to define where the time gate should start. APx also automatically calculates distances to double check the measurement correctly. Measurement results are recalculated based on the new time window and regraphed in real time.
Common speaker tests include frequency response, sensitivity, maximum SPL, phase, group delay, and impedance. The APx Series and 2700 Series both feature extensive programming capabilities for automated production line testing, including advanced reporting, pass/fail limit setting, and control of turntables and other external equipment.

[Yeh捨]

在Cello還是M.L當家的年代,Cello有出一本白皮書.
之所以稱之為"白皮書",是因為它的前後封面,底都是全白的.
在那本白皮書裡,就介紹了美國當時多家著名的錄音室都有採用.
問題是,這是廣告意味呢?還是真的不適用,我就不得而知了!!
不過幾乎可以肯定的是,真的是沒有太多錄音室使用是真的!!

有試圖查各大錄音室之器材表列.
以EMI?之 abbey road有5座音控室.機器很多但不見 cello.:P..TELARC 一度是美國發燒唱片代表..他以前標示主要都是 sony 的錄音/製作器材.
本島大間/有名錄音間.器材少些.也無..

意外的是~telarc在今年4?月..已經裁減一半員工(26人):O!
錄/製工作..全體委外製作啦..(受ipod..網下載..影響(sweat)).

[Yeh捨]

以前有家Pope Music，號稱用全套Cello的器材監聽。不過，好像出了幾張唱片就撐不下去了。這邊還有幾張http://www.elusivedisc.com/products.asp?dept=372

厲害..找到:O.
是否1.太小眾行銷歉佳|-).2.cello全套成本太高..拖垮(sweat).?
popo在台灣小紅一陣過.我就有幾張~站衛兵 8).

[999369]

Cello Acoustic Recordings By Mark Levinson 想这器材必是用Cello直接錄的8)

[999369]

Audio system do not reproduce music they reproduce "recording of music"
這是CD內付的資料------

[martin]

厲害..找到:O.
是否1.太小眾行銷歉佳|-).2.cello全套成本太高..拖垮(sweat).?
popo在台灣小紅一陣過.我就有幾張~站衛兵 8).

Pope Music在日本當時是木內和夫代理，他告訴我老闆家裏非常有錢，做唱片其實賺不了多少，後來被徵召回去經營家族事業，唱片就沒做了。

[chsiang]

厲害..找到:O.
是否1.太小眾行銷歉佳|-).2.cello全套成本太高..拖垮(sweat).?
popo在台灣小紅一陣過.我就有幾張~站衛兵 8).

這張我還是會三不五時拿出來聽......