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"index_show"><a href="http://www.cdcfah.com/zh/"><span>展會信息</span></a></li></ul></div></nav><section class="wrap clearfix"><section class="container clearfix tcPro"><section class="home-main container clearfix"><div id="n3cel38" class="twoCol"><div id="p2ysubs" class="page-proshow clearfix"><p class="current"> 當(dāng)前位置:<a href="http://www.cdcfah.com/">首頁?<a href="http://www.cdcfah.com/cp/">產(chǎn)品供應(yīng)</a>?<a href="http://www.cdcfah.com/cp/first-_swfw/">商務(wù)服務(wù)</a>?<a href="http://www.cdcfah.com/cp/second-swfw_zlhxx/">展覽會信息</a>?<a href="http://www.cdcfah.com/cp/third-zlhxx_jypxysz/">教育、培訓(xùn)、藝術(shù)展</a>?南通線下音頻專業(yè) 創(chuàng)造輝煌上海懷嚴(yán)文化傳媒供應(yīng)</p><div id="yxz3og3" class="leftbox clearfix"><h1>南通線下音頻專業(yè) 創(chuàng)造輝煌上海懷嚴(yán)文化傳媒供應(yīng)</h1><div id="jsuoahe" class="proBig"><div id="podam3e" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/huaiyan/637414038515259363/9916345.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="ktq7m7e" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/huaiyan/637414038515259363/9916345.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="dcp7q8d" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</span>面議</p><p><span>所在地：</span>上海市</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>南通線下音頻專業(yè),音頻</p><p><span>***更新：</span>2020-12-08 06:16:59</p><p><span id="click" >瀏覽次數(shù)：10次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="lzqawvc" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">上海懷嚴(yán)文化傳媒有限公司</a></p><p><span>聯(lián)系人：</span>曹晨光</p><p><span>郵箱: </span>deforu@163.com</p><p><span>電話: </span>13611988611</p><p><span>傳真: </span>021_</p><p><span>網(wǎng)址: </span>http://www.oranshine.com</p><p><span>手機: </span>021-64458098</p><p><span>地址: </span>宜山路508號3E室</p><p>[當(dāng)前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="osz88j7" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="cvico37" class="box"><p><p style="text-indent:25px">我們注意一下身邊的CD片就會看到很多CD都有如：ADD、AAD、DDD等標(biāo)記。三個字母按順序各表示該片在音頻、編輯、成品三個過程中所使用的方法，是模擬(Analog)還是數(shù)字(Digital)。當(dāng)然A表示模擬，D表示數(shù)字。AAD就說明其音頻和編輯是用模擬方式的，而然后灌片是用數(shù)字方式的，這類唱片多是將過去錄制的音樂轉(zhuǎn)成CD片而不做任何修改。ADD則是有一個修改過程，南通線下音頻專業(yè)。許多古典音樂大師的演奏或指揮多錄制于模擬時代，我們聽到的CD是經(jīng)過修改后灌錄的，很多這類唱片都有標(biāo)記ADD。而DDD的唱片必然是較現(xiàn)代的音頻品。自然，CD片必然以D結(jié)尾，而磁帶可以姑且認(rèn)為是AAA，南通線下音頻專業(yè)，南通線下音頻專業(yè)，雖然好像并沒有這種說法。人類能夠聽到的所有聲音都稱之為音頻，它可能包括噪音等。南通線下音頻專業(yè)</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="南通線下音頻專業(yè),音頻" src="https://tyunfile.71360.com/UploadFile/huaiyan/637414038515259363/9916345.png"></div><p style="text-indent:25px">相位：因為一個周期可始于波形的任意一點，所以可以用兩個波形發(fā)生器來產(chǎn)生頻率相同且振幅值相等的兩個正弦波，但它們在同一時刻上幅度不同。這樣的波形稱為不同相的波。相移：一個波形相對于另一個波形超前或滯后的相位量，是其中一個波形在傳輸上時間延遲的結(jié)果。相移度=時間延遲（秒）×頻率×360度。拍音與拍頻：兩個頻率相近簡諧振動產(chǎn)生的疊加振動，其振幅形成周期性變化的聲現(xiàn)象稱為拍音，這一合成振幅的變化頻率稱為拍頻。等于兩個振動的頻率之差。諧波：一個具有頻率為一個波形頻率的整倍數(shù)的波形，就稱為一個波形的諧波。任何重復(fù)的波形都可以分解為含有基波頻率和一系列為基波倍數(shù)的諧波的正弦波分量。南通線下音頻專業(yè)采樣頻率就是采用一段音頻，做為樣本。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="南通線下音頻專業(yè),音頻" src="https://tyunfile.71360.com/UploadFile/huaiyan/637414038273765192/3596499.png"></div><p style="text-indent:25px">雙耳效應(yīng)：盡管單耳耳廓的選聽功能對方位聽感有某些作用，但人是用兩耳聆聽的，對方位的感覺是依靠雙耳完成的，這就是雙耳效應(yīng)。人耳對方位感的作用機理：人耳在一定的聲學(xué)空間內(nèi)能夠?qū)β曉炊ㄎ坏哪芰ΨQ空間定位，取決于兩耳聽覺上的強度差、到達兩耳的時間差、耳廓的作用。雙耳的時間差和相位差是低頻的水平定位的主要因素，隨著頻率的提高，雙耳間的相位可能相同，這時聲壓差和音色差就成了水平定位的主要因素，人耳的縱向定位能力較差。早期反射聲：指經(jīng)過一次、兩次或多次反射后到達接受者的聲音，與混響不同，每個反射聲可以區(qū)分，可以改變聲音的音色、位置和空間感。</p><p style="text-indent:25px">數(shù)碼音頻是我們保存聲音信號，傳輸聲音信號的一種方式，它的特點是信號不容易損失。而模擬信號是我們?nèi)缓罂梢月牭降臇|西。不過模擬信號錄制過程中的修改簡直是一場災(zāi)難，損失太大了。有此僻好的格倫?古爾德若也會瞠目結(jié)舌的。而數(shù)碼音頻復(fù)制100遍也不會有損耗，不信大家COPY一個wav文件試試？數(shù)碼音頻關(guān)鍵一步就是要把模擬信號轉(zhuǎn)換為數(shù)碼信號。就電腦而言是把模擬聲音信號錄制成為wav文件，這個工作Windows自帶的音頻機也可以做到，但是它的功能十分有限，不能滿足我們的需求，所以我們用其他專業(yè)音頻軟件代替，如Sound Forge等。錄制出來的文件就是wav文件，描述wav文件主要有兩個指標(biāo)，一個是采樣頻率，或稱采樣率、采率，另一個是采樣精度也就是比特率。這是數(shù)字音頻制作中十分重要的兩個概念。當(dāng)強迫力的頻率與振動物體的固有頻率成整倍數(shù)關(guān)系時，振動系統(tǒng)獲得較大的振幅。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="南通線下音頻專業(yè),音頻" src="https://tyunfile.71360.com/UploadFile/huaiyan/637414038729419531/318452.png"></div><p style="text-indent:25px">MP3格式壓縮音樂的采樣頻率有很多種，可以用64Kbps或更低的采樣頻率節(jié)省空間，也可以用320Kbps的標(biāo)準(zhǔn)達到極高的音質(zhì)。我們用裝有Fraunhofer IIS Mpeg Lyaer3的 MP3編碼器（現(xiàn)在效果好的編碼器）MusicMatch Jukebox 6.0在128Kbps的頻率下編碼一首3分鐘的歌曲，得到2.82MB的MP3文件。采用缺省的CBR（固定采樣頻率）技術(shù)可以以固定的頻率采樣一首歌曲，而VBR（可變采樣頻率）則可以在音樂“忙”的時候加大采樣的頻率獲取更高的音質(zhì)，不過產(chǎn)生的MP3文件可能在某些播放器上無法播放。我們把VBR的級別設(shè)定成為與前面的CBR文件的音質(zhì)基本一樣，生成的VBR MP3文件為2.9MB。音頻藝術(shù)專業(yè)培養(yǎng)的學(xué)生要求具有較高的藝術(shù)素質(zhì)和修養(yǎng)，具備深厚的音樂功底。南通線下音頻專業(yè)</p><p style="text-indent:25px">要講音頻格式，CD自然是打頭陣的先鋒。南通線下音頻專業(yè)</p><p style="text-indent:25px">流動旋律：RealAudio主要適用于在網(wǎng)絡(luò)上的在線音樂欣賞，大多數(shù)的用戶仍然在使用56Kbps或更低速率的Modem，所以典型的回放并非好的音質(zhì)。有的下載站點會提示你根據(jù)你的Modem速率選擇佳的Real文件。real的的文件格式主要有這么幾種：有RA（RealAudio）、RM（RealMedia，RealAudio G2）、RMX（RealAudio Secured），還有更多。這些格式的特點是可以隨網(wǎng)絡(luò)帶寬的不同而改變聲音的質(zhì)量，在保證大多數(shù)人聽到流暢聲音的前提下，令帶寬較富裕的聽眾獲得較好的音質(zhì)。隨著網(wǎng)絡(luò)帶寬的普遍改善，Real公司正推出用于網(wǎng)絡(luò)廣播的、達到CD音質(zhì)的格式。如果你的RealPlayer軟件不能處理這種格式，它就會提醒你下載一個**的升級包。許多音樂網(wǎng)站提供了歌曲的Real格式的試聽版本?，F(xiàn)在新的版本是RealPlayer 11。南通線下音頻專業(yè)</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2315264.html</p></div></div></div></div></div><div id="pdfhjyf" 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