{"id":85117,"date":"2020-03-27T09:36:29","date_gmt":"2020-03-27T01:36:29","guid":{"rendered":"http:\/\/4563.org\/?p=85117"},"modified":"2020-03-27T09:36:29","modified_gmt":"2020-03-27T01:36:29","slug":"%e9%9f%b3%e9%a2%91-pcm-%e7%9a%84%e6%95%b0%e6%8d%ae%e4%b8%ad%e5%8c%85%e5%90%ab%e8%b4%9f%e5%80%bc%ef%bc%8c%e4%bd%86%e6%98%af%e5%88%86%e8%b4%9d%e8%bd%ac%e6%8d%a2%e5%85%ac%e5%bc%8f%e4%b8%ad%e7%9a%84","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=85117","title":{"rendered":"\u97f3\u9891 PCM \u7684\u6570\u636e\u4e2d\u5305\u542b\u8d1f\u503c\uff0c\u4f46\u662f\u5206\u8d1d\u8f6c\u6362\u516c\u5f0f\u4e2d\u7684\u503c\u8981\u6c42\u662f\u6b63\u503c\uff0c\u8bf7\u95ee\u8fd9\u6837\u662f\u5426\u5b58\u5728\u51b2\u7a81\u5462\uff1f"},"content":{"rendered":"
\n
\n
\n

\u97f3\u9891 PCM \u7684\u6570\u636e\u4e2d\u5305\u542b\u8d1f\u503c\uff0c\u4f46\u662f\u5206\u8d1d\u8f6c\u6362\u516c\u5f0f\u4e2d\u7684\u503c\u8981\u6c42\u662f\u6b63\u503c\uff0c\u8bf7\u95ee\u8fd9\u6837\u662f\u5426\u5b58\u5728\u51b2\u7a81\u5462\uff1f <\/h1>\n

<\/p>\n

\n
\u8cc7\u6df1\u5927\u4f6c : SystemLight <\/span> <\/i> 13<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
<\/p>\n

\u97f3\u9891 PCM \u7684\u6570\u636e\u4e2d\u5305\u542b\u8d1f\u503c\uff0c\u4f46\u662f\u5206\u8d1d\u8f6c\u6362\u516c\u5f0f\u4e2d\u7684\u503c\u8981\u6c42\u662f\u6b63\u503c\uff0c\u8bf7\u95ee\u8fd9\u6837\u662f\u5426\u5b58\u5728\u51b2\u7a81\u5462\uff1f<\/p>\n

\"\u97f3\u9891<\/p>\n

\u6211\u901a\u8fc7 python \u91c7\u96c6\u5230\u7684 sample \u503c\u662f\u5305\u542b\u8d1f\u503c\u7684\uff0c\u8fd9\u6837\u7684\u8bdd\u5982\u4f55\u5c06\u8fd9\u4e2a\u632f\u5e45\u503c\u8f6c\u6210\u5206\u8d1d\u503c\uff0c\u8fd8\u6709 adobe Audition \u4e2d\u7684\u65f6\u57df\u6ce2\u5f62\u56fe\u57fa\u51c6\u7ebf\u4e3a\u4f55\u662f\u8d1f\u65e0\u7a77\u800c\u4e0d\u662f 0 \u5462\uff0c\u770b\u8d77\u6765\u602a\u602a\u7684\u3002<\/p>\n

\"\u97f3\u9891<\/p>\n<\/p><\/div>\n

\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (29<\/span>) <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n
    \n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : noe132 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u5206\u8d1d\u662f\u4e2a\u6bd4\u503c\u5355\u4f4d\uff0c\u8981\u770b\u505a\u5bf9\u6bd4\u7684\u503c\uff08 0db \uff09\u662f\u54ea\u4e00\u4e2a\u3002
    \u632f\u5e45\u662f\u8d1f\u7684\u4e0d\u662f\u53d6\u4e2a\u7edd\u5bf9\u503c\u5c31\u641e\u5b9a\u7684\u4e8b\u4e48 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : catror <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u5206\u8d1d\u662f\u8861\u91cf\u6570\u91cf\u6bd4\u4f8b\u7684\u5355\u4f4d\uff0c\u6b63\u8d1f\u662f\u4e0d\u4f1a\u5f71\u54cd\u6bd4\u4f8b\u7684\u3002\u53e6\u5916\u4f60\u7ed9\u51fa\u7684\u8ba1\u7b97\u516c\u5f0f\u5e94\u8be5\u662f\u4e0d\u5bf9\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : ZZSZZSZZS <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    pcm \u5c31\u662f\u6709\u6b63\u6709\u8d1f\u7684\uff0c\u56e0\u4e3a\u8fd9\u662f\u4e2a\u6b63\u5f26\u6ce2\u5c31\u662f\u6709\u6b63\u6709\u8d1f\u7684\uff0c\u8ddf\u4ea4\u6d41\u7535\u4e00\u6837\uff0c\u6240\u4ee5\u4f60\u628a\u8d1f\u7684\u53d6\u7edd\u5bf9\u503c\u5c31\u597d\u4e86\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : ZZSZZSZZS <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u5e45\u5ea6\u8d8b\u8fd1\u4e8e 0 \u7684\u65f6\u5019\uff0cdb \u5c31\u662f\u8d8b\u8fd1\u4e8e\u8d1f\u65e0\u7a77\u554a <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : Accelerant <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u9ea6\u514b\u98ce\u7684\u632f\u819c\u662f\u53ef\u4ee5\u4e24\u4e2a\u65b9\u5411\u8fd0\u52a8\u7684\uff0c0 \u5c31\u662f\u9759\u6b62 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : msg7086 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u632f\u5e45\u4e0d\u662f\u9707\u52a8\u7684\u5e45\u5ea6\u5417\uff1f\u5e45\u5ea6\u4e0d\u5c31\u662f\u91c7\u6837\u70b9\u5230 0 \u7684\u8ddd\u79bb\u5417\uff1f\u4f60\u8d1f\u6570\u91c7\u6837\u70b9\u5230 0 \u7684\u8ddd\u79bb\u4e5f\u4e0d\u662f\u8d1f\u8ddd\u79bb\u5440\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : SystemLight <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @msg7086 \u6211\u7684\u97f3\u9891\u6570\u636e\u7684\u4f4d\u6df1\u662f 2 \u5b57\u8282\u7684\uff0c\u6211\u53d6\u6570\u636e\u65f6\u5019\u662f\u4e0d\u662f\u7528\u65e0\u7b26\u53f7\u7684 16 \u4f4d\u6574\u578b\u53bb\u53d6\u5c31\u884c\u4e86\u554a\uff0c\u6211\u73b0\u5728\u7528\u7684\u662f\u6709\u7b26\u53f7\u7684\u6574\u578b\uff0c\u4f1a\u51fa\u73b0\u8d1f\u503c\uff0c\u4f46\u662f\u4e0d\u6e05\u695a\u8fd9\u4e2a 2 \u5b57\u8282\u7684 sample \u8868\u793a\u7684\u5927\u5c0f\u5230\u5e95\u662f\u4e0d\u662f\u6709\u7b26\u53f7\u7684 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : liuzhedash <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u9996\u5148\uff1a\u53d6\u7edd\u5bf9\u503c\u662f\u4e0d\u6b63\u786e\u7684\uff0c\u5047\u8bbe\u58f0\u97f3\u7684\u6ce2\u5f62\u6309\u7167 x \u8f74\u4e3a\u65f6\u95f4\uff0cy \u8f74\u4e3a\u632f\u5e45\u663e\u793a\uff0c\u53d6\u7edd\u5bf9\u503c\u7b49\u4e8e\u628a y \u8f74\u8d1f\u534a\u8f74\u7684\u6ce2\u5f62\u7ffb\u8f6c\u5230\u6b63\u534a\u8f74\u3002
    \u6709\u8d1f\u503c\u7684\u539f\u56e0\uff1a\u97f3\u9891\u91c7\u96c6\u7684\u4e24\u4e2a\u4e3b\u8981\u7269\u7406\u91cf\u662f\u91c7\u6837\u9891\u7387\uff08 sample rate \uff09\u548c\u91c7\u6837\u6df1\u5ea6\uff08 bit depth \uff09\uff0c\u91c7\u6837\u9891\u7387\u4ee3\u8868\u6bcf\u79d2\u5bf9\u58f0\u97f3\u8fdb\u884c\u591a\u5c11\u6b21\u91c7\u6837\uff0c\u91c7\u6837\u6df1\u5ea6\u4ee3\u8868\u6bcf\u6b21\u91c7\u6837\u7528\u591a\u5c11 bit \u7684\u4fe1\u606f\u63cf\u8ff0\u91c7\u6837\u7ed3\u679c\uff0c\u5982\u679c\u628a\u8fd9\u4e2a\u7ed3\u679c\u5b9a\u4e49\u4e3a\u6709\u7b26\u53f7\u6570\uff0c\u90a3\u4e48\u5c31\u4f1a\u6709\u8d1f\u503c\uff0c\u53cd\u4e4b\u5b9a\u4e49\u4e3a\u65e0\u7b26\u53f7\u6570\u5c31\u4e0d\u4f1a\u6709\u8d1f\u503c\u3002
    \u516c\u5f0f\uff1a\u8fd9\u4e2a\u516c\u5f0f\u672c\u8eab\u6ca1\u95ee\u9898\uff0c\u4f46\u662f\u6709\u9650\u5b9a\u6761\u4ef6\uff1a\u5f53\u91c7\u6837\u6df1\u5ea6\u662f 16bit\uff0c\u4e14\u91c7\u6837\u8fc7\u6765\u7684\u6570\u503c\u5b9a\u4e49\u4e3a\u65e0\u7b26\u53f7\u6570\u7684\u65f6\u5019\uff08\u503c\u57df[0,65535]\uff09\uff0c\u53ef\u4ee5\u7528\u8fd9\u4e2a\u516c\u5f0f\u8ba1\u7b97 db \u6570\u503c\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : SystemLight <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @Accelerant \u90a3\u97f3\u9891\u6570\u636e\u6bcf\u4e00\u4e2a sample \u7684\u5927\u5c0f\u662f\u6709\u7b26\u53f7\u7684\u8fd8\u662f\u65e0\u7b26\u53f7\u7684\u5462\uff0c\u97f3\u9891\u6570\u636e\u6709\u6b63\u8d1f\u65b9\u5411\u7684\u8bf4\u6cd5\u4e48 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : SystemLight <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @liuzhedash \u5bf9\u5bf9\u5bf9\uff0c\u6211\u73b0\u5728\u4e0d\u6e05\u695a\u7684\u662f\u8fd9\u4e2a\u6570\u636e\u5b9a\u4e49\u672c\u8eab\u662f\u6709\u7b26\u53f7\u7684\u8fd8\u662f\u65e0\u7b26\u53f7\u7684\u5462\uff0c\u56e0\u4e3a\u6211\u81ea\u5df1\u8f6c\u7684\u65f6\u5019\uff0c2 \u4e2a\u5b57\u8282\u4e48\uff0c\u6211\u53ef\u4ee5\u8f6c\u6210\u6709\u7b26\u53f7\uff0c\u4e5f\u53ef\u4ee5\u8f6c\u65e0\u7b26\u53f7\uff0c\u4f46\u662f\u8fd9\u4e2a\u771f\u5b9e\u60c5\u51b5\u4e0b\u662f\u4e0d\u662f\u6709\u7b26\u53f7\u8fd8\u662f\u65e0\u7b26\u53f7\u5c31\u4e0d\u6e05\u695a\u4e86\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : autogen <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u5f52\u4e00\u5316*65535 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : deanguqiang <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @liuzhedash \u4f60\u662f\u8ba4\u771f\u7684\u5417\u3002\u3002\u3002
    \u51e0\u4e4e\u6240\u6709\u7684 ADC \u91c7\u6837\u8fdb\u6765\u90fd\u662f\u6709\u7b26\u53f7\u6570\uff08\u53ef\u80fd\u4f1a\u6709\u4e00\u4e2a 1\/2dBFS \u7684\u504f\u7f6e\uff09\uff0c\u4e3b\u7684\u516c\u5f0f\u662f\u8ba1\u7b97 dBFS\uff0c\u5373\u76f8\u5bf9\u6ee1\u5e45\u5ea6\u7684\u5206\u8d1d\u503c\uff0c\u6240\u4ee5\u6309\u7167\u7edd\u5bf9\u503c\u5c31\u884c\u4e86\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : deanguqiang <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u53e6\u5916\u6211\u8ba4\u4e3a\u4e3b\u7684\u516c\u5f0f\u4e0d\u592a\u5bf9\uff0c16bit \u6709\u7b26\u53f7\u6570\u7684\u8303\u56f4\u662f-32768 \u5230 32767\uff0c\u6240\u4ee5 dBFS = 20 * log10(abs(sample) \/ 32768)\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : liuzhedash <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @deanguqiang
    \u6211\u641e\u9519\u4e86\uff0c16bit \u7684\u91c7\u6837\u6570\u503c\u5e94\u8be5\u6709\u7b26\u53f7\u7684 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : liuzhedash <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @deanguqiang
    @SystemLight
    \u7814\u7a76\u4e86\u4e00\u4e0b\uff0c13L \u7684\u516c\u5f0f\u662f\u6b63\u786e\u7684\u3002
    \u6211 8L \u8bf4\u7684\u6709\u5f88\u591a\u95ee\u9898\uff0c\u4e0d\u8981\u770b\u4e86\u3002<\/p>\n

    \u53ef\u4ee5\u53c2\u8003\u8fd9\u4e24\u4e2a\uff1a
    https:\/\/blog.jianchihu.net\/pcm-vol-control-advance.html
    https:\/\/stackoverflow.com\/questions\/28632721\/does-16bit-integer-pcm-data-mean-its-signed-or-unsigned <\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : xiangyuecn <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    pcm=[1,-2,3,-4…..]
    \u8ba1\u7b97\u8fd9\u4e2a pcm \u7684\u5206\u8d1d\u7684\u4e00\u79cd\u65b9\u6cd5\uff1a\u53d6\u51fa pcm \u91cc\u9762\u7684\u6700\u5927\u503c\uff0c\u53ef\u4ee5\u4e0d\u7ba1\u8d1f\u6570\uff08\u6216\u8005\u7528\u7edd\u5bf9\u503c\uff09\uff0c\u7136\u540e\u7528\u8fd9\u4e2a\u6700\u5927\u503c\u6765\u8ba1\u7b97\u6709\u591a\u5c11\u5206\u8d1d\u3002<\/p>\n

    so\uff0c\u53d6\u6700\u5927\u503c\u4e0d\u53ef\u80fd\u4f1a\u51fa\u73b0\u8d1f\u6570\uff0c\u6700\u591a\u4e3a 0 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : jagger2048 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    1. \u9996\u5148 lz \u7684\u516c\u5f0f\u4e2d 20*log_10 \uff08 x \uff09 \u5176\u5b9e\u5c31\u662f 10 * log_10(x^2)\uff0c\u6709\u5e73\u65b9\u7684\u60c5\u51b5\u4e0b\u6b63\u8d1f\u65e0\u6240\u8c13
    2. \u5176\u6b21 \u4e00\u822c 16 bits \u7684 PCM \u90fd\u662f\u6709\u7b26\u8868\u793a\uff0c\u516c\u5f0f\u4e2d\u7684 65536 \u6709\u95ee\u9898\uff0c\u5e94\u8be5\u662f 32767 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : thedrwu <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u8ba1\u7b97\u91c7\u6837\u5355\u4f4d\u5bbd\u5ea6\u7684\u7535\u529f\u7387\uff0c\u9664\u4ee5\u53c2\u8003\u529f\u7387\uff0c\u505a 10log\uff0c\u4e0d\u7ba1\u6570\u503c\u6b63\u8d1f\uff0c\u529f\u7387\u80af\u5b9a\u662f\u6b63\u7684\u3002\u4f46\u662f\u4e3b\u8bf4\u7684\u4e0d\u662f\u8fd9\u4e2a\u3002<\/p>\n

    \u5982\u679c\u4e3b\u6307\u7684\u662f\u4eba\u8033\u542c\u5230\u7684 dB\uff0c\u6bcf\u4e2a\u9891\u7387\u7684\u6807\u51c6\u7ebf\u4e0d\u4e00\u6837\uff0c\u5148\u5085\u7acb\u53f6\u62c6\u6210\u9891\u8c31\u518d\u505a\u9664\u6cd5\u6216\u8005\u51cf\u6cd5\u3002<\/p>\n

    \u57fa\u51c6\u7ebf\u8d1f\u65e0\u7a77\u662f\u56e0\u4e3a log0=\u8d1f\u65e0\u7a77\u3002 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : msg7086 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u91c7\u6837\u90fd\u662f\u6709\u7b26\u53f7\u7684\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : SystemLight <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @jagger2048 \u5b9e\u9645\u4e0a\u516c\u5f0f\u662f 10 * log_10((sample\/32767)^2) \u5bf9\u5427 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : SystemLight <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @thedrwu \u57fa\u51c6\u7ebf\u662f\u56e0\u4e3a\u91c7\u6837\u7684\u6570\u503c\u4e3a 0 \u65f6\uff0c\u5f97\u5230\u7684\u5206\u8d1d\u662f\u8d1f\u65e0\u7a77\uff0c\u800c\u57fa\u51c6\u7ebf\u4e24\u8fb9\u5c31\u662f\u5206\u522b\u4ee3\u8868\u91c7\u6837\u7684\u632f\u5e45\u503c\u7684\u6b63\u8d1f\u6362\u7b97\u8fc7\u6765\u7684\u5206\u8d1d\u503c\u662f\u5427\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : SystemLight <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @liuzhedash \u8bf6\uff0c\u6709\u70b9\u7cca\u6d82\u4e86\uff0c\u7b2c\u4e00\u4e2a\u6587\u7ae0\u91cc\u9762\u63d0\u5230\uff1a\u5982\u679c\u5c06\u58f0\u97f3\u91c7\u6837\u5927\u5c0f\u589e\u52a0\u4e00\u500d\u5230 16bit\uff0c\u4ea7\u751f\u7684\u52a8\u6001\u8303\u56f4\u5219\u4e3a 96 \u5206\u8d1d\uff0c\u8ba1\u7b97\u516c\u5f0f\u5982\u4e0b\uff1a
    dB = 20 * log(65536)<\/p>\n

    \u4ed6\u5728 16 \u4f4d\u7684 sample width \u7528\u7684\u4e0d\u5c31\u662f 65536 \u4e48 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : thedrwu <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @SystemLight #21
    \u4f60\u60f3\u6e05\u695a\u4f60\u7684\u76ee\u7684\u662f\u4ec0\u4e48\u3002\u5206\u8d1d\u672c\u8eab\u53ea\u662f\u4e00\u4e2a\u529f\u7387\u6bd4\u4f8b\u7684 log \u3002<\/p>\n

    #22
    \u548c\u5e26\u4e0d\u5e26\u7b26\u53f7\u65e0\u5173\uff0c\u591a\u4e00\u4e2a bit \u4f60\u80fd\u6d4b\u7684\u4fe1\u53f7\u8303\u56f4\u53d8\u6210\u4e86\u539f\u6765\u7684 2 \u500d\uff08=6dB \uff09\u3002\uff08\u7b26\u53f7\u4f4d\u4e5f\u4f7f\u8303\u56f4\u589e\u4e24\u500d\uff0c\u53ea\u4e0d\u8fc7\u4eba\u4e3a\u5730\u89e3\u91ca\u6210\u4e86\u7b26\u53f7\uff09 <\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : SystemLight <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @thedrwu \u611f\u89c9\u597d\u50cf\u662f\u79bb\u76ee\u6807\u8d8a\u6765\u8d8a\u8fdc\u4e86\uff0c\u54c8\u54c8\uff0c\u6211\u5176\u5b9e\u5462\u60f3\u5b9e\u73b0\u8fd9\u4e2a\u56fe\u7247\u6548\u679c\uff0chttps:\/\/www.buzzsprout.com\/player\/wave\/10\uff0c\u770b\u8fd9\u4e2a\u6700\u9ad8\u7684\u9ad8\u5ea6\u662f 60\uff0c\u6211\u7684\u60f3\u6cd5\u5c31\u662f\u628a\u5206\u8d1d\u56fa\u5b9a\u5230 0 \u5230 60 \u5206\u8d1d\u8fd9\u4e2a\u8303\u56f4\uff0c\u7136\u540e\u5bf9\u6574\u4e2a\u97f3\u9891\u7684\u5e27\u5747\u5300\u62bd\u6837\u51fa 200 \u4e2a\u7247\u6bb5\uff0c\u7136\u540e\u6839\u636e\u8fd9\u4e2a\u7247\u6bb5\u4e2d\u6bcf\u4e2a\u7684\u632f\u5e45\u503c\u7b97\u51fa\u5bf9\u5e94\u7684\u5206\u8d1d\u5927\u5c0f\uff0c\u51b3\u5b9a\u6bcf\u4e2a\u5c0f\u5757\u7684\u5927\u5c0f\uff0c\u8fd9\u6837\u7684\u601d\u8def\u662f\u5426\u5408\u7406\u6b63\u786e\u5462\uff0c\u6c42\u6307\u70b9\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : ssdde <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u77e5\u4e4e\u4e5f\u80fd\u505a\u56fe\u5e8a\uff1f\u7a33\u5417\uff1f <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : thedrwu <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @SystemLight
    \u94fe\u63a5\u91cc\u53ea\u6709\u4e2a\u7a84\u7a84\u7684\u5c0f\u56fe\u3002
    \u5ffd\u7565\u4eba\u8033\u611f\u5b98\u7684\u57fa\u51c6\u66f2\u7ebf\u548c masking \u4e4b\u7c7b\u7684\u673a\u5236\uff0c\u542c\u5230\u7684\u97f3\u91cf\u548c\u632f\u5e45\u5927\u81f4\u662f\u5bf9\u6570\u5173\u7cfb\u7684\u3002
    \u5982\u679c\u753b\u56fe\u4e0d\u9700\u8981\u7cbe\u786e\u7684\u6570\u503c\uff0c\u5750\u6807\u53ef\u4ee5\u6bd4\u8f83\u968f\u610f\u3002<\/p>\n

    \u7a0d\u5fae\u6bd4\u4f8b\u6b63\u786e\u5730\u753b\u90a3\u5f20\u7a84\u7a84\u7684\u5c0f\u56fe\uff0c\u53ef\u4ee5\u8ba1\u7b97\u6bcf\u4e2a\u5c0f\u533a\u95f4\u7684\u5e73\u5747\u529f\u7387\uff08\u6216\u7edd\u5bf9\u503c\u5e73\u5747\uff0c\u5982\u679c\u65f6\u95f4\u5747\u5300\uff0c\u53cd\u6b63\u5f00\u5bf9\u6570\u4e4b\u540e\u53ea\u5dee\u4e2a 2 \uff09\uff0c\u53d6\u4e86\u5bf9\u6570\u518d\u7f29\u653e\u5230 60 \u7684\u533a\u95f4\uff0c\u6bd4\u5982\u628a\u6700\u5927\u7684\u5bf9\u6570\u529f\u7387\u5b9a\u4e3a 60\uff0c\u5c0f\u4e8e\u67d0\u6570\u5b57\uff08\u542c\u529b\u7684\u9608\u503c\uff09\u7684\u780d\u6210 0 \u3002 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : thedrwu <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @SystemLight
    \u518d\u7b80\u5355\u70b9\uff0c\u7b97\u4e2a\u5e73\u5747 most significant bit \u7684\u4f4d\u6570\uff0c\u4e0d\u9700\u8981\u771f\u6b63\u7684\u53d6\u5bf9\u6570\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : xcstream <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u5206\u8d1d \u4e3a\u4ec0\u4e48\u4e0d\u80fd\u662f\u8d1f\u7684 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : SystemLight <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @thedrwu \u597d\u7684\uff0c\u611f\u8c22\u6307\u6559 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n","protected":false},"excerpt":{"rendered":"

    \u97f3\u9891 PCM \u7684\u6570\u636e\u4e2d\u5305\u542b\u8d1f\u503c\uff0c\u4f46…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/85117"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=85117"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/85117\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=85117"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=85117"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=85117"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}