LIHKG [音響撚]究竟音響係唔係變咗玄學
用樣子過日子 2018-12-31 21:43:05 佢講到個後級咁食電又要粗線又剩,但就插足六件,我真係幫佢唔到
:^(

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Viperfx 2018-12-31 21:44:12 其實13amp plug英國工業用既足load 既鴨記13蚊就有 又唔貴 好過燒撚埋屋企
IT唔係狗 2018-12-31 21:44:14 有睇過類似嘅嘢,應該係流
http://www.intexcables.com/9-cable-myths.html
Blackstar 2018-12-31 21:44:34 hdmi線我就唔太清楚佢咩原理
但係干擾都不外乎係磁場同埋線長
因為所以digital都有set 一個固定既電壓值先至會開始讀取
例如電腦發出黎係2.3v, 收果個可能唔可以少過2.1v,如果唔係就直接當冇收過野出error
只要干擾咁岩令到佢電壓既variation係2.09-2.11咁跳就會導致訊號不穩
如果個標準越高, for example 普通hdmi 1080p可能容許係2.1, 4k既話可能只可以容許2.28v以上, 咁樣對線材既要求就會越高

都係果句我唔係video人,我係以audio既傳輸原理去估計hdmi既運作
唔一定岩煩請指教
Blackstar 2018-12-31 21:46:05 mute撚左都會有noise架
好撚多老seafood都係聽依d就話隻喇叭好唔好
屌佢啦哄到咁埋聽
你試下我正常音量你哄咁埋睇下聽唔聽到noise
:^(
Viperfx 2018-12-31 21:48:13 屌 我d喇叭係天花板架
:^(

Mute左都有既就唔係noise 係heating 黎
要本身喇叭amp個邊gain爆到好勁先聽到
因為line array近會好易聽到
用樣子過日子 2018-12-31 21:50:33 有noise都聽唔撚到啦,人老左都都聽唔到嗰啲frequency
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Blackstar 2018-12-31 21:50:37 我就試過做demo 有d唔係audio人哄埋隻mute左既喇叭聽底噪然後話咁大底既得唔得架
:^(
:^(

在場既師兄都指住黎笑
line array吊咁撚高鬼聽到依d noise咩
淨係你部冷氣機都嘈過佢啦
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:^(
:^(
夕陽武士 2018-12-31 21:50:38 ACK係行Bulk mode先有
:^(

Real time野, 例如audio, 係行Isochronous mode
:^(


https://source.android.com/devices/audio/usb#isochronous

Isochronous transfer mode
USB audio uses isochronous transfer mode for its real-time characteristics, at the expense of error recovery. In isochronous mode, bandwidth is guaranteed, and data transmission errors are detected using a cyclic redundancy check (CRC). But there is no packet acknowledgement or re-transmission in the event of error.
Viperfx 2018-12-31 21:51:47 D老屎忽真係好撚煩 成撚日扮晒金耳朵咁
IT唔係狗 2018-12-31 21:52:34 USB Asynchronous mode唔使對clock
HDMI好似唔係Packet所以要
有錯請指正

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Blackstar 2018-12-31 21:54:49 不過有d 老屎忽係真係勁既
經佢tune完套野係真係好好多
後生果輩依家好多都係用mic cap套curve黎拉條eq
佢地果班就直接聽到邊個frequecy黎執幾多q幾多gain
:^(
Viperfx 2018-12-31 21:56:12 好明顯heating都唔識既就唔係勁個班啦
:^(
IT唔係狗 2018-12-31 21:58:21 近幾年DAC 多數都行Asynchronous
例如TEAC
http://audio.teac.com/product/ud-301/
Viperfx 2018-12-31 22:02:03 佢個部係後級定係分體冷氣後架 要成13amp電咁大咬
:^(
來自篤精的你 2018-12-31 22:03:34 data package lose左又無buffer直頭係無左聲, 最簡單就係藍牙耳機, 因為無ram做buffer先成日會段線, 無data到唔係會走音, 加下係digital年代, 聲音data數碼化一係就有聲, 一係就無聲, 玄學撚無聲聽出黎會走音?

cd player都係即時轉code, 花左讀唔到係讀唔到data, 音響撚係會聽到走音而唔係lag左
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佢部amp仲勁過google個ai, data lose左個cpu都照轉到code出聲
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如果寫code就正, 個program run唔到同佬細講因為條usb線lose左data先會有bug, 個佬細即時唔係炒你而係即刻搵人整條咩晶銅既usb線同lan線出黎
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Viperfx 2018-12-31 22:06:15 可能佢玩開黑膠碟
夕陽武士 2018-12-31 22:09:38 Asynchronous mode係Isochronous 既其中一個mode
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http://thewelltemperedcomputer.com/KB/USB.html

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來自篤精的你 2018-12-31 22:11:26 但後級又真係好大咬, 13a單拖一部後級真係唔出奇, 但香港有幾多屋企有成千呎放音響?都唔洗咁大輸出.

膽機講靚聲300b, 輸出都係10w樓下1聲道, 但都推到唔少大喇叭
微豐細乳 2018-12-31 22:12:10 Bose apple耳機好?
:^(

清你玩鳩我?
真係想討論既,麻煩清你去轉旺角星際,叫店員比部m2 + ie800s你聽symphony/ live performance,你都覺得70蚊耳機贏既我冇野好講
:^(

利申:玩同聽classical music,同樣覺得高級音響撚好多玄學
甲烷製造員 2018-12-31 22:13:49 耳機綫真係有分別
但係電源綫同hdmi綫真係唔知有咩分別
:^(