[耳機撚]召集大耳牛、枱式耳機系統用家(18)
Mingccmcml 2020-8-2 21:50:21 我經驗係真係睇錄音
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之前聽過隻盧冠廷自彈自唱嘅cd, 都係人聲偏一邊, 然後吉他另一邊.

就算新啲嘅歌, 有時都聽到少少偏. 我當係特色
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我係打手 2020-8-2 21:56:42 呢個係唔係就係mid/side Processing ?
https://www.rme-audio.de/downloads/adi2dac_e.pdf
8.7 M/S Processing The mid/side principle is a special positioning technique for microphones, which results in a mid signal on one channel and a side signal on the other channel. This information can be trans-formed back into a stereo signal quite easily. The process sends the monaural mid channel to left and right, the side channel too, but phase inverted (180°) to the right channel. For a better understanding: the mid channel represents the function L+R, while the side channel represents L-R. During record the monitoring needs to be done in 'conventional' stereo. Therefore the ADI-2 DAC also offers the functionality of a M/S-decoder. Activation is done in the Settings menu of Line Out, Phones Out and IEM Out via the option M/S-Proc. The M/S-Processing automatically operates as M/S encoder or decoder, depending on the source signal format. When processing a usual stereo signal, all monaural information will be shifted into the left channel, all stereo information into the right channel (thus the stereo signal is M/S encoded).
我係打手 2020-8-2 21:58:54 講起個d LPCD成日個人聲都係左邊,聽到我頭都側,搞到我以為自己聽覺有問題
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做遊戲開發無前途 2020-8-2 22:46:35 https://a85115230.pixnet.net/blog/post/388541836-打破-stereo-圖像的遊戲規則-mid-side-processing,


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做遊戲開發無前途 2020-8-2 22:54:01 用喇叭聽都冇咁誇張
但如果用耳機嘅話就勁誇張
好似左右唔同大細聲咁
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我係打手 2020-8-2 23:51:57 唔係好睇得明
side L同R反相會令音場變大,變返正相就全部野集係mid?
失敗主義者 2020-8-2 23:57:32 此回覆已被刪除
做遊戲開發無前途 2020-8-3 00:00:02 其實我都唔係好明 可能真係等毫子巴打得唔得閒講解下

M/S 呢一類歌曲上次去展覽
如果有中置喇叭嘅話 配合適當嘅歌曲
真係會好似個歌手左右行嚟行去咁
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SolarFlashlight 2020-8-3 00:47:05 新手想請教吓咁多位師兄
本身用開dap+入耳,最近想試吓耳罩費事成日塞住耳窿,想搵啲dap推到既耳罩,手頭dap係n6ii
偏向想搵啲耐聽啲既聲,唔太喜歡冷聲野
我見話denon d5200同tago t3-01都係較啱直推,有冇師兄可以分享吓?如果有其他4k以下耳罩推介都歡迎
另外因為本身用開jvc所以都對mx100都有啲興趣,但monitor啱唔啱聽歌?
千億個夜晚 2020-8-3 01:19:55 早排啲人係咁屌陳百強嗰幾隻LPCD由正相master咗變反相
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我係打手 2020-8-3 02:02:04 monitor聽歌係冇問題
暖聲又唔難推的話仲有HD660s
HD600都OK,不過HD660s易推d
tago t3-01要盲入,咁不如平平地盲入cd900st先,唔啱聽都起碼冇咁高成本
鐵三角同beyerdynamic會刺激d,可能冇咁耐聽(講緊連續用8個鐘唔停
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哥是Dick 2020-8-3 02:04:31
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我係打手 2020-8-3 02:05:10
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LPCD我買過幾隻,中完伏之後就永不錄用
係陳慧嫻個隻正常d
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SHMCD + K2最好聽
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我係打手 2020-8-3 02:05:40
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千億個夜晚 2020-8-3 02:37:03 想知相位係咩概念
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Pern 2020-8-3 15:40:14 師兄你用乜裝備聽 LPCD ?
做遊戲開發無前途 2020-8-3 16:03:46
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正負極的shield 連不連接有沒有分別?
例如HD600的2pin接4 pin xlr背景會冇noise?

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Ebrajom 2020-8-3 18:32:04 此回覆已被刪除
我係打手 2020-8-3 19:51:51 所有wave有3個屬性amplitude、frequency、phase(相位)
amplitude關大細聲,frequency(period)關發出咩聲,phase同時機有關
假設有粒子震動,60Hz sine wave
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粒子唔同時間會處處不同位置,呢d就係相位
0.004s 位於 1,0.012幾s 位於 -1
不過咁描述粒子運動太煩,想象下如果講1MHz會有幾多個零?
waveform會重複,所以如果我地focus係一個period(T)入面,用d代號代替講時間,就會方便d
即係T/4 位於 1, T/2位於0, 3T/4 位於 -1, T位於0, 5T/4位於 1, ....
另一方面,一個wave嘅相位其實可以用一個圓盤轉動去比喻/理解
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用返上面個例子,90度位於1,180度位於0,270度位於-1,360度位於0, ...

係sine wave最高同最低位相距幾耐?就係270-90=180度
所以最高同最低位個相位差(phase difference)就係180度

正相、反相講兩個waveform之間關系
將一個waveform 反轉就得到佢嘅反相waveform
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將一個waveform反轉,亦可以講兩個waveform有180度相位差

音響上正相、反相聲音分別係左右定位不變,而係面前嘅聲變成係身後面,音場大但空,唔實淨

而當正相聲音存在而同佢嘅反相聲音相遇,震動就會抵消。呢個就係ANC個原理。
ANC會實時將收到嘅聲反相經單元輸出,抵消係耳機同耳仔之間原本收到嘅外來噪音
我係打手 2020-8-3 20:01:21
正負極的shield 連不連接有沒有分別?

以下係聽人講,我唔識:
正確做cable shielding應該係接source個邊shield要ground,接receive個邊shield唔駁野,否則shield收到嘅noise就比埋receive end
一般做shielding都係signal 線,耳機線唔洗,因為SNR夠大
我係打手 2020-8-3 20:03:08 細部、好力,聲乾淨
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千億個夜晚 2020-8-3 20:29:01
而係面前嘅聲變成係身後面,音場大但空,唔實淨


其他全部都明,惟獨呢句R晒頭,點解將個wave invert咗將前面嘅聲變咗去後面?
我係打手 2020-8-3 20:57:04 試下
https://youtu.be/kUT6ZhFdLkA
我係打手 2020-8-3 21:07:03 而家rip咗碟,用電腦聽
最初用Pioneer BDP-150

portable CD機用panasonic sl-sw404
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Pern 2020-8-3 21:26:05 之前我都買過幾隻 LPCD 用安橋平價 CD 機聽,但唔覺有大細聲,可能係批次問題...
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