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鉴别APE质量之图文并茂

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发表于 2007-5-1 21:54:58 | 只看该作者 回帖奖励 |倒序浏览 |阅读模式
<STRONG>鉴别APE质量之图文并茂<BR></STRONG>这些天看到论坛上很多询问怎样鉴别APE质量好坏的帖子,现在我就和大家分享一下我的方法。<BR>需要准备的软件工具:<BR>1.Tau Analyzer<B>安装文件下载见下</B>;这是用来鉴别APE质量好坏的核心工具。这是俄罗斯人推出的一款共享软件(未注册好像只能对一张专辑前两首进行分析,一般我也就分析一首),主要是用来鉴别CD是否为正版,其内核就是auCDtect(同一个作者),操作简单,对分析是否为正版CD或APE好坏还是足够了。目前最新的版本为1.2。不过不知为什么,这个软件分析得好像不是很稳定(针对同一个文件,有时会出现频谱,有时就没有,频率分布图有时也是如此,可以试着多分析几次。在我的低配置机上还真是慢阿,郁闷!)<BR>2.Daemon Tool;用来制作光盘映像的工具,也有许多其它软件,注意,制作光盘映像不支持APE,支持wav。所以就要将APE转换成wav(一般我也就转一张专辑里的一首歌曲,这个比较有效率,不过要想让Tau Analyzer得出的结果更正确,就多转几首吧)。注意装载的cue文件要编辑一下,还好这个过程比较简单。<BR>3.Foobar;用来播放及转换ape的优秀软件,我一直在用,很方便。题外话使用此软件的其它功能需要一些DIY精神(网上这方面的资料不少,尤其是处理大量音乐的tag非常方便)。替代软件猴子不过不是很方便。<BR>闲言少叙,下面就是操作步骤。下面就以本论坛<BR>第一步:<BR>用Foobar将APE格式的专辑里一首曲子转换成wav,这个没啥说的,基本比较简单。然后是编辑该首曲目的cue文件,最方便的是考一个现成的cue文件(要保证与转换后得到的wav文件在同一目录下,且同名)在这个基础上编辑,格式上基本不会出问题。我们只保留第一个曲目信息就好了,其余删掉。见图<BR><A href="http://music.onegreen.net/UploadFiles/200601/200722011166734.jpg" target=_blank><IMG onmousewheel="return imgzoom(this);" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor='hand'; this.alt='Click here to open new window\nCTRL+Mouse wheel to zoom in/out';}" onclick="if(!this.resized) {return true;} else {window.open('http://music.onegreen.net/UploadFiles/200601/200722011166734.jpg');}" alt="" src="http://music.onegreen.net/UploadFiles/200601/200722011166734.jpg" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt='Click here to open new window\nCTRL+Mouse wheel to zoom in/out';}" border=0></A><BR>我们只保留文件头部和Track01的信息,并编辑第三行引号内的部分。因为转换成的wav的名字是I Swear了,所以需要编辑一下。当然也可以改变wav的文件名为CDImage啦,随个人喜好,总之让第三行引号内的内容与wav同名就好了(注意扩展名为wav)。见下图<BR><A href="http://music.onegreen.net/UploadFiles/200601/200722011167621.jpg" target=_blank><IMG onmousewheel="return imgzoom(this);" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor='hand'; this.alt='Click here to open new window\nCTRL+Mouse wheel to zoom in/out';}" onclick="if(!this.resized) {return true;} else {window.open('http://music.onegreen.net/UploadFiles/200601/200722011167621.jpg');}" alt="" src="http://music.onegreen.net/UploadFiles/200601/200722011167621.jpg" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt='Click here to open new window\nCTRL+Mouse wheel to zoom in/out';}" border=0></A><BR>第二步:<BR>启动Daemon加载cue文件,如果出错,请检查cue文件是否编辑错误。操作简单,就不罗嗦了。我这里的虚拟光驱的盘符为G:<BR>第三步:<BR>启动Tau Analyzer,加载盘片。选择好盘符,按左侧那个+号按钮(Read new CD)就是了。<BR><A href="http://music.onegreen.net/UploadFiles/200601/200722011167371.jpg" target=_blank><IMG onmousewheel="return imgzoom(this);" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor='hand'; this.alt='Click here to open new window\nCTRL+Mouse wheel to zoom in/out';}" onclick="if(!this.resized) {return true;} else {window.open('http://music.onegreen.net/UploadFiles/200601/200722011167371.jpg');}" alt="" src="http://music.onegreen.net/UploadFiles/200601/200722011167371.jpg" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt='Click here to open new window\nCTRL+Mouse wheel to zoom in/out';}" border=0></A><BR>加载后<BR><A href="http://music.onegreen.net/UploadFiles/200601/200722011167112.jpg" target=_blank><IMG onmousewheel="return imgzoom(this);" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor='hand'; this.alt='Click here to open new window\nCTRL+Mouse wheel to zoom in/out';}" onclick="if(!this.resized) {return true;} else {window.open('http://music.onegreen.net/UploadFiles/200601/200722011167112.jpg');}" alt="" src="http://music.onegreen.net/UploadFiles/200601/200722011167112.jpg" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt='Click here to open new window\nCTRL+Mouse wheel to zoom in/out';}" border=0></A><BR>加载后,我们看到标签页CD Info变黄了,它提供了一些基本的驱动器和盘片信息 <BR><A href="http://music.onegreen.net/UploadFiles/200601/200722011167833.jpg" target=_blank><IMG onmousewheel="return imgzoom(this);" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor='hand'; this.alt='Click here to open new window\nCTRL+Mouse wheel to zoom in/out';}" onclick="if(!this.resized) {return true;} else {window.open('http://music.onegreen.net/UploadFiles/200601/200722011167833.jpg');}" alt="" src="http://music.onegreen.net/UploadFiles/200601/200722011167833.jpg" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt='Click here to open new window\nCTRL+Mouse wheel to zoom in/out';}" border=0></A><BR>第四步<BR>就是分析了,要选一下分析模式(主要是设定分析的速度质量),在左侧最下面。这里我们选1,速度要慢,但结果保证准确,是保证质量最好的模式。然后按左侧标有箭头的按钮(Analyze CD),开始分析了。 <BR><A href="http://music.onegreen.net/UploadFiles/200601/200722011167140.jpg" target=_blank><IMG onmousewheel="return imgzoom(this);" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor='hand'; this.alt='Click here to open new window\nCTRL+Mouse wheel to zoom in/out';}" onclick="if(!this.resized) {return true;} else {window.open('http://music.onegreen.net/UploadFiles/200601/200722011167140.jpg');}" alt="" src="http://music.onegreen.net/UploadFiles/200601/200722011167140.jpg" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt='Click here to open new window\nCTRL+Mouse wheel to zoom in/out';}" border=0></A><BR>分析结束后,相应的标签页会变黄(上面提到过可能有时Spetrum和Frequency没有得到结果,多试几次有时会有)。我们看到Tracks下的Status栏有CDDA字样表明,表明是由质量比较有保证的CD转成的。 <BR><A href="http://music.onegreen.net/UploadFiles/200601/200722011168876.jpg" target=_blank><IMG onmousewheel="return imgzoom(this);" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor='hand'; this.alt='Click here to open new window\nCTRL+Mouse wheel to zoom in/out';}" onclick="if(!this.resized) {return true;} else {window.open('http://music.onegreen.net/UploadFiles/200601/200722011168876.jpg');}" alt="" src="http://music.onegreen.net/UploadFiles/200601/200722011168876.jpg" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt='Click here to open new window\nCTRL+Mouse wheel to zoom in/out';}" border=0></A><BR>下面是该首曲目的频谱图(时—频)21Khz以上的频率也仍然很丰富 <BR><A href="http://music.onegreen.net/UploadFiles/200601/200722011168436.jpg" target=_blank><IMG onmousewheel="return imgzoom(this);" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor='hand'; this.alt='Click here to open new window\nCTRL+Mouse wheel to zoom in/out';}" onclick="if(!this.resized) {return true;} else {window.open('http://music.onegreen.net/UploadFiles/200601/200722011168436.jpg');}" alt="" src="http://music.onegreen.net/UploadFiles/200601/200722011168436.jpg" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt='Click here to open new window\nCTRL+Mouse wheel to zoom in/out';}" border=0></A><BR>下面是频率分布图 <BR><A href="http://music.onegreen.net/UploadFiles/200601/200722011168884.jpg" target=_blank><IMG onmousewheel="return imgzoom(this);" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor='hand'; this.alt='Click here to open new window\nCTRL+Mouse wheel to zoom in/out';}" onclick="if(!this.resized) {return true;} else {window.open('http://music.onegreen.net/UploadFiles/200601/200722011168884.jpg');}" alt="" src="http://music.onegreen.net/UploadFiles/200601/200722011168884.jpg" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt='Click here to open new window\nCTRL+Mouse wheel to zoom in/out';}" border=0></A><BR>下面是一张从某论坛下来的《黑毒》,当然是从盗版压制过来的,不过做得也算好的了,因为单纯从频谱来说如果没有正版来对比还是挺难分辨的,但观察Status的信息MPEG就一目了然了,是从压缩过的文件转来的。 <BR><A href="http://music.onegreen.net/UploadFiles/200601/200722011168954.jpg" target=_blank><IMG onmousewheel="return imgzoom(this);" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor='hand'; this.alt='Click here to open new window\nCTRL+Mouse wheel to zoom in/out';}" onclick="if(!this.resized) {return true;} else {window.open('http://music.onegreen.net/UploadFiles/200601/200722011168954.jpg');}" alt="" src="http://music.onegreen.net/UploadFiles/200601/200722011168954.jpg" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt='Click here to open new window\nCTRL+Mouse wheel to zoom in/out';}" border=0></A><BR><BR><BR>这个是其Spectrum <BR><A href="http://music.onegreen.net/UploadFiles/200601/200722011169572.jpg" target=_blank><IMG onmousewheel="return imgzoom(this);" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor='hand'; this.alt='Click here to open new window\nCTRL+Mouse wheel to zoom in/out';}" onclick="if(!this.resized) {return true;} else {window.open('http://music.onegreen.net/UploadFiles/200601/200722011169572.jpg');}" alt="" src="http://music.onegreen.net/UploadFiles/200601/200722011169572.jpg" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt='Click here to open new window\nCTRL+Mouse wheel to zoom in/out';}" border=0></A><BR>这个是其Frequency <BR><A href="http://music.onegreen.net/UploadFiles/200601/200722011169148.jpg" target=_blank><IMG onmousewheel="return imgzoom(this);" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor='hand'; this.alt='Click here to open new window\nCTRL+Mouse wheel to zoom in/out';}" onclick="if(!this.resized) {return true;} else {window.open('http://music.onegreen.net/UploadFiles/200601/200722011169148.jpg');}" alt="" src="http://music.onegreen.net/UploadFiles/200601/200722011169148.jpg" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt='Click here to open new window\nCTRL+Mouse wheel to zoom in/out';}" border=0></A><BR>另外也有无法分辨的情况会在Status下显示为UNKN。这时APE的质量比较的不好说了,就得凭大家的耳朵了,不过这样的APE勉强可以接受吧(不要嘲笑我的要求低,呵呵)。<BR>下面是一典型从mp3(码率为128kbps)转过来的例子,当然Status显示的是MPEG了 <BR><A href="http://music.onegreen.net/UploadFiles/200601/200722011169521.jpg" target=_blank><IMG onmousewheel="return imgzoom(this);" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor='hand'; this.alt='Click here to open new window\nCTRL+Mouse wheel to zoom in/out';}" onclick="if(!this.resized) {return true;} else {window.open('http://music.onegreen.net/UploadFiles/200601/200722011169521.jpg');}" alt="" src="http://music.onegreen.net/UploadFiles/200601/200722011169521.jpg" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt='Click here to open new window\nCTRL+Mouse wheel to zoom in/out';}" border=0></A><BR>看频谱,大概在15KHz就被斩断了,犹如刀切的,这种音质的音乐是让人不怎么能忍受的 <BR><A href="http://music.onegreen.net/UploadFiles/200601/200722011169660.jpg" target=_blank><IMG onmousewheel="return imgzoom(this);" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor='hand'; this.alt='Click here to open new window\nCTRL+Mouse wheel to zoom in/out';}" onclick="if(!this.resized) {return true;} else {window.open('http://music.onegreen.net/UploadFiles/200601/200722011169660.jpg');}" alt="" src="http://music.onegreen.net/UploadFiles/200601/200722011169660.jpg" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt='Click here to open new window\nCTRL+Mouse wheel to zoom in/out';}" border=0></A><BR>这是其Frequency <BR><A href="http://music.onegreen.net/UploadFiles/200601/2007220111610337.jpg" target=_blank><IMG onmousewheel="return imgzoom(this);" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor='hand'; this.alt='Click here to open new window\nCTRL+Mouse wheel to zoom in/out';}" onclick="if(!this.resized) {return true;} else {window.open('http://music.onegreen.net/UploadFiles/200601/2007220111610337.jpg');}" alt="" src="http://music.onegreen.net/UploadFiles/200601/2007220111610337.jpg" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt='Click here to open new window\nCTRL+Mouse wheel to zoom in/out';}" border=0></A><BR>好了,以上这些就是用Tau Annalyze检测APE文件优劣的一些步骤。说到这里大家会奇怪为什么ISRC Info标签页总是灰色的不可用。明示一下,这个是针对检测真正的CD盘片时要用到的,正版的CD都会有ISRC信息,下面介绍一下ISRC<BR>ISRC (International Standard Recording Code)就是国际标准录音录影资料代码,有正式的录音资料编码,是为正货。无录音资料编码,即为假货。有关录音资料编码的真伪可进一步向ISRC管理机构查询。联合国「国际标准组织」(International Standardization Organization,简称ISO) 于公元1986年所制定的一套国际性编码系统(ISO 3901) 。这就是ISRC编码的起源。ISRC编码对于录音录影资料,就是国际间通用的资料识别码,作为辨识唱片等录音资料及影盘片等音乐性资料的国际标准,保护著作人的权利。国际唱片业联盟 (InternationalFederation of the PhonographicIndustry,简称IFPI) ,在1989年被ISO认定为ISRC编码管理权责机构。 唱片制造业者向「国际唱片业联盟」(ISRC管理中心)取得生产者编码权后,即可开始对将出版发行之CD唱片进行编码,并将编好的资料回报ISRC管理中心。ISRC管理中心将资料审核后,即存入【ISRC查询系统】供业者及销费者查询。在录音产品母带制作过程中,ISRC编码必须被烧录于母带的每一音轨上。同时,在CD唱片的产品上,亦须标示ISRC编码。ISRC编码由12个英文字母或阿拉伯数字所组成,代码分成四段:  <BR>  (1)国码: 由2个大写字母组成,为CD唱片之出产国或地区。<BR>  (2)出版公司代码: 由3个文数字组成。<BR>  (3)录制年代码: 由2个数字组成,为公元年之后两位数。<BR>  (4)录音录影资料代码: 由5位数字组成,为作品流水号,同一年度中不可重复。<BR>还是非常简单的。当然也有出错的时候,对于CD碟片的检测是否为正版的准确率是相当高的。但基本无法区别APE是否为比较高质量的盗版(当然不是经过压制后的劣质玩意儿了)转换而来(用大家的金耳朵吧,呵呵),但区分是否从mp3等损失音质严重的文件转换而来的APE还是绰绰有余的。
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