{"id":1196,"date":"2011-03-03T17:30:19","date_gmt":"2011-03-03T09:30:19","guid":{"rendered":"http:\/\/www.ccttours.com\/blog\/?p=1196"},"modified":"2011-03-03T17:32:05","modified_gmt":"2011-03-03T09:32:05","slug":"sc%ef%bc%9a%e8%87%aa%e7%84%b6%e5%8f%8a%e5%b9%b3%e5%9d%87%e5%be%8b%e9%9f%b3%e7%a8%8b%ef%bc%8c%e5%a4%9a%e9%80%9a%e9%81%93%e6%89%a9%e5%b1%95%ef%bc%8c%e5%85%a8%e5%b1%80%e5%8f%98%e9%87%8f","status":"publish","type":"post","link":"https:\/\/learn.travelchinawith.me\/?p=1196","title":{"rendered":"SC\uff1a\u81ea\u7136\u53ca\u5e73\u5747\u5f8b\u97f3\u7a0b\uff0c\u591a\u901a\u9053\u6269\u5c55\uff0c\u5168\u5c40\u53d8\u91cf"},"content":{"rendered":"

\u5982\u540c\u6211\u4eec\u5728\u4e4b\u524d\u7ae0\u8282\u4e2d\u8ba8\u8bba\u7684\uff0c\u7eaf\u97f3\u7a0b\u5373\u6bd4\u7387\u3002\u4e00\u4e2a\u516b\u5ea6\u662f2:1\u3002\u4e5f\u5c31\u662f\u8bf4A440\u4e4b\u4e0a\u7684\u4e00\u4e2a\u516b\u5ea6\u5373\u5b83\u7684\u500d\u6570\uff0c\u6216880\u3002\u518d\u4e0a\u4e00\u4e2a\u516b\u5ea6\u662f1760\u3002\u97f3\u7a0b\u5012\u7f6e\u5373\u5012\u6570\uff1a\u5f80\u4e0a\u4e00\u4e2a\u516b\u5ea6\u662f2:1\uff0c\u5f80\u4e0b\u4e00\u4e2a\u516b\u5ea6\u662f1:2\u3002\u897f\u65b9\u97f3\u4e50\u4e2d\u4f7f\u7528\u7684\u97f3\u7a0b\u6765\u81ea\u548c\u58f0\u7ea7\u6570\uff08harmonic series\uff09\uff0c\u662f\u57fa\u51c6\u6570\u7684\u500d\u6570\u3002\u5982\u679c\u57fa\u51c6\u97f3\u662f200\uff08\u4f60\u542c\u5230\u7684\u97f3\uff09\uff0c\u90a3\u4e48\u548c\u58f0\u90e8\u5206\u5373200, 400, 600, 800, 1000 \u7b49\u7b49\u3002\u57fa\u51c6\u97f3\u4e4b\u4e0a\u7684\u97f3\u7a0b\u5373\u516b\u5ea6\u3001\u4e94\u5ea6\u3001\u516b\u5ea6\u3001\u4e09\u5ea6\u3001\u4e94\u5ea6\u3001\u4e03\u5ea6\u3001\u516b\u5ea6\u7b49\u7b49\uff0c\u5982\u4e0b\u56fe\u6240\u793a\u3002
\n<\/p>\n

\"\u548c\u58f0\u7ea7\u6570\"<\/a>
\u548c\u58f0\u7ea7\u6570<\/figcaption><\/figure>\n

C2 \u662f\u56fe\u8868\u4e0a\u6700\u5e95\u90e8\u7684\u97f3\u3002\u6211\u4eec\u78b0\u5230\u7684\u7b2c\u4e00\u4e2a\u4e94\u5ea6\u662fG3\uff0c\u7b2c\u4e09\u4e2a\u548c\u58f0\u3002\u8981\u7b97G2\uff08C2\u4e4b\u4e0a\u7b2c\u4e94\u4e2a\uff09\uff0c\u4f60\u53ef\u4ee5\u5148\u5411\u90a3\u4e2a\u9891\u7387\u4e583\uff08G30\uff09\uff0c\u7136\u540e\u518d\u9664\u4ee52\u5411\u4e0b\u79fb\u52a8\u4e00\u4e2a\u516b\u5ea6\u5230G2\uff0c\u62163\/2\u3002\u8ba9\u6211\u4eec\u8bf4C2\u662f60Hz\uff08\u4ee5\u4fbf\u4e8e\u8ba1\u7b97\uff09\uff0cC3\u5c06\u662f120\uff0cG3 180\uff0cG2\u5c06\u662f\u8fd9\u4e2a\u7684\u4e00\u534a\uff1a60 * 3 \/ 2 = 90\u3002<\/p>\n

\u7b2c\u4e94\u4e2a\u548c\u58f0\u662f\u7ea7\u6570\u4e2d\u7684\u7b2c\u4e00\u4e2a\u5927\u4e09\u5ea6\uff0c\u5b9e\u9645\u4e0a\u662f\u4e24\u4e2a\u516b\u5ea6\u548c\u4e00\u4e2a\u4e09\u5ea6\uff08E4\uff09\u3002\u6b32\u8ba1\u7b97C2\u4e4b\u4e0a\u7684\u4e00\u4e2a\u4e09\u5ea6\uff08E2\uff09\uff0c\u9996\u5148\u4e58\u4ee55\u4ee5\u5f97\u5230E4\uff0c\u8ba9\u540e\u9664\u4ee52\u964d\u516b\u5ea6\uff0c\u5373\uff1aE2 = 60 * 5 \/ 4 = 75\u3002<\/p>\n

\u8bb0\u5fc6\u97f3\u7a0b\u6bd4\u7387\u6709\u4e00\u4e9b\u6280\u5de7\u3002\u4e00\u4e2a\u516b\u5ea6\u662f2:1\uff0c\u4e94\u5ea6\u662f3:2\uff0c\u56db\u5ea6\u662f4:3\uff0c\u4e09\u5ea6\u662f5:4\uff0c\u5c0f\u4e09\u5ea6\u662f6:5\uff0c\u4e8c\u5ea6\u662f9:8\u3002\u6ce8\u610f\u6240\u6709\u5206\u5b50\u90fd\u6bd4\u5206\u6bcd\u59271\u3002\u56e0\u6b64\u5982\u679c\u4f60\u80fd\u8bb0\u5f97\u5e8f\u5217\uff08sequence\uff09\u516b\u5ea6\u3001\u4e94\u5ea6\u3001\u56db\u5ea6\u3001\u4e09\u5ea6\u3001\u5c0f\u4e09\u548c\u4e8c\u5ea6\uff0c\u4f60\u901a\u5e38\u4fbf\u80fd\u91cd\u5efa\u6bd4\u7387\uff08\u8bb0\u5f979:8\u662f\u4e00\u79d2\uff09\u3002<\/p>\n

\u540c\u6837\u5730\uff0c\u4f60\u53ef\u4ee5\u53c2\u7167\u4e0a\u8fb9\u90a3\u4e2a\u548c\u58f0\u7ea7\u6570\u4ee5\u5b9a\u4f4d\u897f\u65b9\u6821\u97f3\u4e2d\u7684\u97f3\u7a0b\u53ca\u5bf9\u5e94\u7684\u6bd4\u7387\u3002\u548c\u58f01\u548c2\u95f4\u7684\u97f3\u7a0b\u662f\u4e00\u4e2a\u516b\u5ea6\uff082:1\uff09\uff0c2\u548c3\u95f4\u662f\u4e00\u4e2a\u4e94\u5ea6\uff083:2\uff09\uff0c3\u548c4\u95f4\u662f\u4e00\u4e2a\u56db\u5ea6\uff084:3\uff09\uff0c4\u548c5\u95f4\u662f\u4e00\u4e2a\u5927\u4e09\u5ea6\uff085:4\uff09\uff0c5\u548c6\u95f4\u662f\u4e00\u4e2a\u5c0f\u4e09\u5ea6\uff086:5\uff09….\u4f46\u968f\u540e\u7cfb\u7edf\u5d29\u6e83\u4e86\u30026\u548c7\u95f4\u7684\u97f3\u7a0b\u662f\u4ec0\u4e48\uff1f7\u548c8\u5462\uff1f\u6211\u4eec\u4e3a\u4ec0\u4e48\u4e0d\u7528\u5b83\u4eec\uff1f\u6211\u4eec\u5e94\u8be5\u7528\u5b83\u4eec\u5417\uff1f8\u548c9\u95f4\u662f\u6211\u4eec\u7528\u4f5c1\u79d2\uff089:8\uff09\u7684\u97f3\u7a0b\u3002\u6700\u540e\u4e24\u4e2a\u9610\u8ff0\u4e86\u6211\u4eec\u7528\u4e8e15\u548c16\u95f4\u7684\u534a\u97f3\uff0816:15\uff09\u3002\u8fd8\u9700\u6ce8\u610f\u548c\u58f05\u548c8\u4e4b\u95f4\u7684\u97f3\u7a0b\u662f\u4e00\u4e2a\u5c0f\u516d\u5ea6\uff088:5\uff09\u3002\u4e00\u4e2a\u5927\u516d\u5ea6\uff085:3\uff09\u53ef\u4ee5\u5728\u7b2c\u516d\u548c\u7b2c\u5341\u4e2a\u548c\u58f0\u95f4\u627e\u5230\uff0c\u5927\u4e03\u5ea6(15:8)\uff0c\u4f4d\u4e8e8\u548c15\u4e4b\u95f4\uff0c\u5c0f\u4e03\u5ea6(9:5)\u4f4d\u4e8e9\u548c5\u4e4b\u95f4\u3002<\/p>\n

\u4e0b\u8fb9\u8fd9\u4e2apatch\u5141\u8bb8\u4f60\u6d4b\u8bd5\u4e0d\u540c\u7684\u97f3\u7a0b\u3002r = 2\/1 \u4ee3\u8868\u4e86\u7b2c\u4e8c\u4e2a\u9891\u7387\u7684\u6bd4\u7387\u3002\u5982\u679c f = 400\uff0cr = 2:1\uff08\u201c\u4e8c\u5230\u4e00\u201d\uff09\uff0c\u7136\u540ef*r \u662f 800\uff0c\u6216\u8005\u8bf4 400\u4e582\u9664\u4ee51\u3002\u5373\u4f7f\u9664\u4ee51\u662f\u6ca1\u6709\u4f5c\u7528\u7684\uff0c\u4f46\u6211\u8fd8\u662f\u5c06\u5b83\u5199\u51fa\u6765\uff0c\u8fd9\u6837\u4f60\u4fbf\u53ef\u4ee5\u5c1d\u8bd5\u4e0d\u540c\u7684\u6bd4\u7387\u4ee5\u8bc1\u5b9e\u5b83\u4eec\u786e\u5b9e\u4ee3\u8868\u666e\u901a\u7684\u97f3\u7a0b\u3002\u5c06r\u7684\u503c\u6539\u4e3a3\/2 (\u4e00\u4e2a\u4e94\u5ea6), 4\/3 (\u4e00\u4e2a\u56db\u5ea6), 5\/4 \u7b49\u7b49\u3002\u4e09\u5168\u97f3\u7684\u8bdd\uff0c\u5c1d\u8bd564\/45\u3002<\/p>\n

13.1. \u97f3\u7a0b<\/strong><\/p>\n

(\r\n{\r\n     f = 400; \/\/fundamental\r\n     r = 2\/1; \/\/ratio for second note in interval\r\n     FSinOsc.ar([f, f*r], mul: 0.6)\r\n}.scope(2)\r\n)<\/pre>\n
FSinOsc<\/em>\uff08\u5feb\u901f\u6b63\u5f26\u632f\u8361\u5668\uff09\u7684\u7b2c\u4e00\u5f15\u6570\u4e0d\u662f\u5355\u72ec\u7684\u503c\uff0c\u800c\u662f\u4e00\u4e2a\u6570\u7ec4\u3002\u8bb0\u5f97\u6570\u7ec4\u662f\u4f4d\u4e8e\u65b9\u62ec\u53f7\u5185\u7684\u4e00\u4e32\u7531\u9017\u53f7\u95f4\u9694\u5f00\u7684\u503c\u3002\u5f53\u6570\u7ec4\u88ab\u5728\u4efb\u4f55\u5730\u65b9\u7528\u4f5c\u5f15\u6570\uff0cSC\u4f1a\u5c06\u6574\u4e2apatch\u4e3a\u6bcf\u4e2a\u901a\u9053\u6269\u5c55\u4e3a\u4e24\u4e2a\u5b8c\u5168\u76f8\u540c\u7684patch\u3002\u6211\u4eec\u7528\u6570\u7ec4\u4e2d\u7684\u7b2c\u4e00\u4e2a\u503c\u7ed9\u5de6\u58f0\u9053\uff0c\u7b2c\u4e8c\u4e2a\u7ed9\u53f3\u58f0\u9053\u3002\u8fd9\u4e2a\u6781\u597d\u7684\u529f\u80fd\u88ab\u79f0\u4e3a\u591a\u901a\u9053\u6269\u5c55\uff08multi-channel expansion\uff09\u3002\u591a\u4e8e\u4e24\u4e2a\u503c\u7684\u6570\u7ec4\u5c06\u88ab\u6269\u5c55\u5230\u66f4\u591a\u901a\u9053\uff1a\u4f60\u58f0\u5361\u80fd\u5904\u7406\u591a\u5c11\u5c31\u80fd\u6269\u5c55\u5230\u591a\u5c11\u3002SC\u5339\u914d\u6240\u6709\u6570\u7ec4\u5f15\u6570\uff0c\u5728\u9700\u8981\u7684\u5730\u65b9\u590d\u5236\uff0c\u4ee5\u521b\u5efa\u5e73\u884c\u7684patch\u3002<\/p>\n
13.2. \u591a\u901a\u9053\u6269\u5c55<\/strong><\/p>\n
\/\/\u8fd9\u6bb5\u4ee3\u7801\r\n\r\n(\r\n{SinOsc.ar(\r\n     LFNoise0.ar([10, 12, 14, 6], 400, [800, 1000]),\r\n     mul: [0.3, 0.5])}.scope(4)\r\n)\r\n\r\n\/\/\u5728\u6bcf\u4e2a\u901a\u9053\u5185\u53d8\u6210\u8fd9\u4e2a\r\n\r\n(\r\n\/\/\u901a\u90531\r\n{SinOsc.ar(\r\n     LFNoise0.ar(10, 400, 800),\r\n     mul: 0.3)}.scope(1)\r\n)\r\n\r\n(\r\n\/\/\u901a\u90532\r\n{SinOsc.ar(\r\n     LFNoise0.ar(12, 400, 1000),\r\n     mul: 0.5)}.scope(1)\r\n)\r\n\r\n(\r\n\/\/\u901a\u90533\r\n{SinOsc.ar(\r\n     LFNoise0.ar(14, 400, 800),\r\n     mul: 0.3)}.scope(1)\r\n)\r\n\r\n(\r\n\/\/\u901a\u90534\r\n{SinOsc.ar(\r\n     LFNoise0.ar(6, 400, 1000),\r\n     mul: 0.5)}.scope(1)\r\n)<\/pre>\n
\u518d\u770b\u4e00\u6b21\u90a3\u4e2a\u97f3\u7a0b\u7684patch\u3002\u56e0\u4e3a\u6240\u6709\u9891\u7387\u90fd\u662f\u5468\u671f\u6027\u7684\uff0c\u800c\u4e14\u90fd\u662f\u6570\u5b66\u6bd4\u7387\uff0c\u76f8\u957f\uff08constructive\uff09\u548c\u76f8\u6d88\uff08destructive\uff09\u70b9\u53d8\u6210\u4e00\u4e2a\u805a\u5408\uff08aggregate\uff09\uff0c\u6211\u4eec\u5728\u6ce2\u8c37\u548c\u6ce2\u5cf0\u201c\u542c\u5230\u201d\u4f5c\u4e3a\u7ed3\u679c\u7684\u6a21\u5f0f\u3002\u4e0b\u9762\u662f\u540c\u6837\u7684\u4e09\u901a\u9053\u6269\u5c55\u7684\u4f8b\u5b50\u3002\u5982\u679c\u4f60\u5728\u53cc\u58f0\u9053\u8bbe\u5907\u4e0a\u56de\u653e\u7684\u8bdd\uff0c\u4f60\u5c06\u4ec5\u80fd\u542c\u52301\u548c2\u3002\u7b2c\u4e09\u4e2a\u5c06\u4f5c\u4e3a\u5206\u6790\uff08\u5c3d\u7ba1\u5b83\u540c\u6837\u4f1a\u53d1\u58f0\uff09\u3002\u5c06r = 2\/1 \u6539\u4e3a\u5176\u4ed6\u6bd4\u7387\u6bd4\u5982 3\/2, 4\/3, 5\/4, 6\/5, 9\/8\u7b49\u7b49\u3002<\/p>\n
13.3. \u97f3\u7a0b<\/strong><\/p>\n
(\r\n{\r\n     f = 400; r = 2\/1;\r\n     a = FSinOsc.ar(f, 0.3);\r\n     b = FSinOsc.ar(f*r, 0.3);\r\n[a, b, a+b]*0.3\r\n}.scope(3, zoom: 4)\r\n)<\/pre>\n
\u5728\u4e4b\u524d\u7684\u51e0\u4e2apatch\u91cc\u4f60\u53ef\u80fd\u4f1a\u6ce8\u610f\u5230\uff0c\u6211\u5728\u7533\u660e\u53d8\u91cf\u524d\u5c31\u53ef\u4ee5\u4f7f\u7528\u5b83\u4eec\u3002\u8fd9\u662f\u56e0\u4e3a\u5b57\u6bcda-z\u662f\u5168\u5c40\u53d8\u91cf\uff0cSC\u8fd0\u884c\u540e\u4fbf\u5df2\u88ab\u7533\u660e\uff0c\u4f7f\u7528\u8d77\u6765\u5f88\u65b9\u4fbf\u3002\u4f46\u662f\u6211\u4e0d\u5f97\u4e0d\u8b66\u544a\u4f60\uff1a\u968f\u7740\u4f60\u7684patch\u53d8\u5f97\u8d8a\u6765\u8d8a\u590d\u6742\uff0c\u4f60\u5f88\u53ef\u80fd\u4f1a\u540e\u6094\u5f53\u521d\u4f7f\u7528\u4e86\u5168\u5c40\u53d8\u91cf\u800c\u4e0d\u662f\u4e00\u4e9b\u66f4\u6709\u610f\u4e49\u7684\u540d\u5b57\u3002<\/p>\n
\u540c\u6837\u6ce8\u610f\u51fd\u6570\u4ee3\u7801\u7684\u6700\u540e\u4e00\u884c\u662f\u53d8\u91cf\u7684\u6570\u7ec4\u3002\u8fd9\u6700\u540e\u4e00\u884c\u88ab\u79f0\u4f5c\u201c\u8fd4\u56de\uff08return\uff09\u201d\u3002\u4e00\u4e2a\u4e0d\u7ba1\u51fd\u6570\u4e3b\u4f53\u90e8\u5206\u53d1\u751f\u4e86\u4ec0\u4e48\u4ec5\u201c\u8fd4\u56de\u201d\u6700\u540e\u4e00\u884c\u4ee3\u7801\u7684\u51fd\u6570\uff0c\u5982\u4e0b\u6240\u793a\u3002<\/p>\n
13.4. \u8fd4\u56de\u51fd\u6570\uff1a\u6700\u540e\u4e00\u884c<\/strong><\/p>\n
(\r\n{ \/\/ \u8fd9\u6bb5\u4ee3\u7801\u5c06\u4ec5\u6f14\u594f \"c\"\r\n     a = FSinOsc.ar(200);\r\n     b = FSinOsc.ar(1000);\r\n     c = Pulse.ar(45);\r\n     d = FSinOsc.ar(400);\r\nc\r\n}.scope(1)\r\n)<\/pre>\n
(\r\n     1 + 25;\r\n     1000 * 13 \/ 4;\r\n     1 + 1;\r\n     7; \/\/ \u5c06\u4ec5\u5217\u5370\u8fd9\u4e00\u884c\uff0c\u5176\u4ed6\u90e8\u5206\u65e0\u6548\u3002\r\n)<\/pre>\n
\u8fd9\u91cc\u662f\u4e00\u4e9b\u591a\u79cd\u97f3\u7a0b\u6ce2\u5f62\u7684\u56fe\u793a\u3002\u7b2c\u4e00\u4e2a\u662f\u8d85\u8fc71\/10\u79d2\u7684\u4e94\u5ea6\u3002<\/p>\n
\"\u8d85\u8fc71\/10\u79d2\u7684\u4e94\u5ea6\u97f3\u7a0b\"<\/a>
\u8d85\u8fc71\/10\u79d2\u7684\u4e94\u5ea6\u97f3\u7a0b<\/figcaption><\/figure>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\u6709\u5f88\u591a\u6ce2\u5cf0\u548c\u6ce2\u8c37\u3002\u6700\u9ad8\u5cf0\u548c\u6700\u4f4e\u8c37\u662f\u76f8\u957f\u5e72\u6d89\u6700\u5927\u91cf\u7684\u5730\u65b9\u3002\u6ce2\u4eec\u88ab\u53e0\u52a0\u5728\u4e00\u8d77\u4ee5\u63a8\u62c9\u66f4\u8fdc\u3002\u6211\u4eec\u5c06\u6574\u4e2a\u6a21\u5f0f\u542c\u505a\u4e00\u4e2a\u4e94\u5ea6\u3002\u63a5\u7740\u662f\u56db\u5ea6(4\/3), \u4e09\u5ea6 (5\/4), \u5c0f\u516d\u5ea6 (8\/5), \u6700\u540e\u5230\u4e09\u5168\u97f3 (64\/45)\u3002<\/p>\n
\"p3\"<\/a>
p3<\/figcaption><\/figure>\n
\"p4\"<\/a>
p4<\/figcaption><\/figure>\n
\u5728\u8f83\u4f4e\u7684\u6bd4\u7387\u4e0b\u4f1a\u6709\u66f4\u591a\u7684\u76f8\u957f\u5e72\u6d89\uff0c\u56e0\u6b64\u6709\u8f83\u5c11\u7684\u6ce2\u5cf0\u548c\u6ce2\u8c37\u3002\u9ad8\u6bd4\u7387\u4e0b\u6709\u66f4\u591a\u76f8\u6d88\u5e72\u6d89\u548c\u66f4\u591a\u7684\u6ce2\u5cf0\u4e0e\u6ce2\u8c37\u3002\u5373\u4f7f\u62e5\u6709\u590d\u6742\u7684\u6ce2\u3001\u8c37\uff0c\u6211\u4eec\u4ecd\u7136\u80fd\u591f\u542c\u5230\u6a21\u5f0f\uff08pattern\uff09\u3002\u8c10\u548c\u4e0e\u4e0d\u8c10\u548c\u53ef\u4ee5\u4e0e\u7ed9\u5b9a\u65f6\u95f4\u5185\u6a21\u5f0f\u7684\u6ce2\u5cf0\u6570\u91cf\u76f4\u63a5\u76f8\u5173\uff0c\u5e76\u80fd\u88ab\u5176\u5b9a\u4e49\uff0c\u6216\u8005\u8bf4\uff0c\u5b9a\u4e49\u6a21\u5f0f\u6ce2\u5cf0\u95f4\u7684\u65f6\u95f4\u3002\u66f4\u591a\u7684\u5cf0\u3001\u8c37\uff0c\u66f4\u5927\u7684\u4e0d\u8c10\u548c\u3002<\/p>\n
\u6211\u4eec\u7684\u773c\u775b\u548c\u5927\u8111\u8bc6\u522b\u89c6\u89c9\u6a21\u5f0f\uff0c\u6b63\u5982\u6211\u4eec\u7684\u53cc\u8033\u8bc6\u522b\u7531\u76f8\u957f\u548c\u76f8\u6d88\u5e72\u6d89\u9020\u6210\u7684\u542c\u89c9\u6a21\u5f0f\u3002<\/p>\n
\u4e0b\u4f8b\u5b9e\u65f6\u9610\u660e\u4e86\u8fd9\u4e00\u6982\u5ff5\u3002\u5b83\u5141\u8bb8\u4f60\u5c06\u4e24\u4e2a\u4f4e\u9891\u79fb\u5230\u4eba\u7c7b\u7684\u542c\u89c9\u8303\u56f4\u5185\u3002\u8fd9\u4e2a\u65b9\u6cd5\u4e0b\uff0c\u4f60\u53ef\u4ee5\u5148\u542c\u5230\u4e00\u7ec4\u6ef4\u7b54\u58f0(click)\u6216\u4f4e\u9891\u8109\u51b2\u7684\u6a21\u5f0f\u3002\u4f34\u968f\u8109\u51b2\u6216\u952f\u9f7f\u6ce2\uff0c\u4f60\u4f1a\u5728\u5f53\u626c\u58f0\u5668\u8fd4\u56de\u521d\u59cb\u4f4d\u7f6e\u7684\u6bcf\u4e2a\u6ce2\u7684\u5468\u671f\u5185\u542c\u5230\u4e00\u4e2a\u5355\u72ec\u7684\u6ef4\u7b54\u58f0\uff08\u6211\u4eec\u50cf\u542c3\/2, 4\/3\u7b49\u8282\u594f\u6a21\u5f0f\u4e00\u6837\u542c\u5230\u5355\u72ec\u7684\u8109\u51b2\uff09\u3002\u7136\u540e\u968f\u7740\u4f60\u5c06\u9f20\u6807\u53f3\u79fb\uff0c\u5c06\u9891\u7387\u5e26\u8fdb\u4eba\u7c7b\u542c\u89c9\u8303\u56f4\uff0c\u4f60\u4fbf\u542c\u5230\u4e86\u97f3\u7a0b\u3002\u9996\u5148\u5c1d\u8bd5\u8fd0\u884c\u4e0b\u8fb9\u8fd9\u884c\u4ee3\u7801\u4ee5\u542c\u5230LFO\u548c\u97f3\u9891\u7387\u4e4b\u95f4\u7684\u533a\u522b\u3002\u5c06\u9f20\u6807\u5de6\u79fb\u4ee5\u5f97\u5230\u4f4e\u9891\uff0c\u53f3\u79fb\u5f97\u5230\u97f3\u9891\u9891\u7387\u3002<\/p>\n
13.5. \u97f3\u9891\u9891\u7387<\/strong><\/p>\n
{Saw.ar(MouseX.kr(1, 1200, 1), 0.5)}.scope(1)<\/pre>\n
\u4e0b\u8fb9\u8fd9\u4e2apatch\u7528\u4e24\u4e2a\u9891\u7387\u5b9a\u4e49\u4e00\u4e2a\u97f3\u7a0b\u3002\u6211\u7528\u53d8\u91cfratioNum \u548c ratioDenum\u5c06\u6bd4\u7387\u8bbe\u7f6e\u52303:2\uff0c\u8bd5\u7740\u5c06\u4e4b\u6539\u4e3a2:1, 4:3, 5:4\u7b49\u3002\u540c\u6837\u53ef\u4ee5\u8bd5\u8bd5\u8d85\u5e38\u89c4\u6bd4\u7387\u6bd4\u59828:3, 7:2\u3002\u6ce8\u610f\uff0c\u6570\u5b57\u8d8a\u5927\uff0c\u4e00\u81f4\u7684\u76f8\u957f\u5e72\u6d89\u6ce2\u5cf0\u5c31\u4f1a\u8d8a\u5c11\uff0c\u6211\u4eec\u7684\u8033\u6735\u4f1a\u611f\u77e5\u5230\u66f4\u591a\u4e0d\u548c\u8c10\u97f3\u7a0b\u3002<\/p>\n
\u542c\u5176\u6a21\u5f0f\uff0c\u89c6\u5176\u8303\u56f4\u3002\u63a5\u4e0b\u6765\u7f13\u6162\u5c06\u9f20\u6807\u79fb\u81f3\u53f3\u4fa7\u76f4\u5230\u9891\u7387\u6210\u97f3\u3002\u5c06\u5b83\u5b8c\u5168\u79fb\u5230\u53f3\u8fb9\u4ee5\u8bc1\u5b9e\u90a3\u6b63\u662f\u4f60\u5728\u5c1d\u8bd5\u7684\u97f3\u7a0b\u3002<\/p>\n
13.6. \u4ece\u4f4e\u9891\u5230\u97f3\u9891\u7387\u7684\u6bd4\u7387\uff08Ratios from LF to audio rate<\/strong>\uff09<\/p>\n
(\r\n{\r\nvar freq, ratioNum, ratioDenum; \/\/\u7533\u660e\u4e24\u4e2a\u53d8\u91cf\r\nratioNum = 3; \/\/\u8d4b\u503c\u5206\u5b50\r\nratioDenum = 2; \/\/\u8d4b\u503c\u5206\u6bcd\r\nfreq = MouseX.kr(1,440, warp: 1); \/\/\u9891\u7387\u88ab\u9f20\u6807\u63a7\u5236\r\nLFSaw.ar(\r\n     [freq, freq*(ratioNum\/ratioDenum)], 0,\r\n     0.3)\r\n}.scope(2)\r\n)<\/pre>\n
\u81ea\u7136\u97f3\u7a0b vs. \u5e73\u5747\u97f3\u7a0b\uff08Just vs. Equal Intervals\uff09<\/h3>\n
\u6211\u4eec\u73b0\u5728\u6709\u4e00\u70b9\u70b9\u8fdb\u9000\u4e24\u96be\uff08\u6216\u8005\u8bf4\u66f4\u591a\u9009\u62e9\uff09\u3002\u6211\u4eec\u662f\u4f7f\u7528\u7eaf\u7684\uff0c\u81ea\u7136\u7684\u97f3\u7a0b\uff1f\u8fd8\u662f\u4f7f\u7528\u5e73\u5747\u4e50\u5f8b\uff08equal temperament\uff09\uff1f\u5728\u4e4b\u524d\u7ae0\u8282\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528 midicps \u5c06 MIDI\u6570\u8f6c\u6362\u4e3a\u9891\u7387\u3002\u4f46MIDI\u503c\u662f\u88ab\u5e73\u5747\u8c03\u548c\uff08temper\uff09\u7684\u3002\u6211\u4eec\u4e4b\u524d\u5b9e\u9a8c\u7684\u6bd4\u7387\u5176\u7ed3\u679c\u662f\u81ea\u7136\u8c03\u8c10\uff08just tuning\uff09\u3002\u8be5\u7528\u54ea\u4e2a\u5462\uff1f\u5fc5\u987b\u4e8c\u62e9\u4e00\u5417\uff1f\u5b83\u4eec\u771f\u7684\u5982\u6b64\u4e0d\u540c\uff1f<\/p>\n
\u662f\u7684\uff0c\u5b83\u4eec\u771f\u7684\u5982\u6b64\u4e0d\u540c\u3002\u5e73\u5747\u5f8b\u97f3\u9636\u91cc\u7684\u6bcf\u4e2a\u534a\u97f3\u662f100\u5206\u3002MIDI\u6570\u7528\u4e00\u4e2a\u6574\u6570\u7ed9\u6bcf\u4e2a\u534a\u97f3\uff0c\u56e0\u6b64\u53ef\u4ee5\u4f7f\u7528\u4e24\u4e2a\u5c0f\u6570\u70b9\u7684\u7cbe\u51c6\u6765\u63cf\u8ff0\u5206\u3002C4\u548cC#4\u95f4\u7684\u56db\u5206\u97f3\u7b26\uff0c\u6bd4\u5982\u8bf4\uff0c\u662f60.5\uff0860+50\u5206\uff09\u3002\u4e0b\u8fb9\u7684\u4ee3\u7801\u5c55\u793a\u4e86\u5982\u4f55\u7528\u7eaf\u6bd4\u7387\u8ba1\u7b97\u5927\u8c03\u97f3\u9636\uff0c\u7136\u540e\u5c06\u90a3\u4e9b\u9891\u7387\u8f6c\u6362\u4e3aMIDI\u503c\uff0c\u7a0d\u540e\u53ef\u4e0e\u5e73\u5747\u5f8b\u503c\u505a\u6bd4\u8f83\u3002<\/p>\n
13.7. \u5e73\u5747\u5f8b\u5bf9\u6bd4\u7eaf\u5f8b<\/strong><\/p>\n
(261.6 * [1, 9\/8, 5\/4, 4\/3, 3\/2, 5\/3, 16\/15, 2\/1]).round(0.01)<\/pre>\n
[261.6, 294.3, 327, 348.8, 392.4, 436, 279.04, 523.2].cpsmidi.round(0.01)<\/pre>\n
\u7ed3\u679c\u81ea\u7136\u6bd4\u7387\u6216\u79f0\u7eaf\u6bd4\u7387\u662f60, 62.04, 63.86, 64.98, 67.02, 68.84, 61.12, 72\uff0c\u4e0e\u4e4b\u76f8\u5bf9\u7684\u7ed3\u679c\u662f60, 62, 64, 65, 67, 69, 70, 72\u3002\u5927\u4e09\u5ea6\u964d\u4e8614\u5206\uff0c\u5927\u516d\u5ea6\u964d\u4e8616\u5206\u3002<\/p>\n
\u8ba9\u6211\u4eec\u7528\u4f4e\u9891\u5230\u97f3\u9891\u7387\u7684\u5b9e\u9a8c\u6765\u770b\u5b83\u4eec\u662f\u5982\u4f55\u53d1\u58f0\u7684\u3002\u4e0b\u8fb9\u7684\u4f8b\u5b50\u4e2d\u6709\u4e24\u70b9\u975e\u5e38\u91cd\u8981\u7684\u5dee\u522b\u3002\u9996\u5148\uff0cMouseX \u4e0d\u518d\u6709\u6307\u6570\u7684\u53d8\u5f62\uff08exponential warp\uff09\u3002\u8fd9\u662f\u56e0\u4e3aMIDI\u6570\u662f\u7ebf\u6027\u7684\u3002\u9891\u7387\u88ab\u81ea\u52a8\u8f6c\u5316\u4e3amidicps\u6d88\u606f\u91cc\u7684\u6307\u6570\u503c\u3002\u53e6\u5916\uff0c\u97f3\u7a0b\uff08\u8868\u8ff0\u4e3a\u534a\u97f3\uff08half step\uff09\uff09\u88ab\u52a0\u5230\u5de6\u9ea6\u514b\u98ce\u7684\u503c\u4e0a\uff0c\u5e76\u975e\u50cf\u4ee5\u5f80\u90a3\u6837\u4e58\u4ee5\u6bd4\u7387\u3002<\/p>\n
13.8. \u4ece\u4f4e\u9891\u5230\u97f3\u9891\u7387\u7684\u6bd4\u7387\uff08Ratios from LF to audio rate\uff09<\/strong><\/p>\n
(\r\n{\r\nvar midiNum, interval;\r\ninterval = 7;\r\nmidiNum = MouseX.kr(0.1, 84);\r\nLFSaw.ar(\r\n      [midiNum.midicps, (midiNum + interval).midicps], 0,\r\n      0.3)\r\n}.scope(2)\r\n)<\/pre>\n
\u5f53\u4e0e\u5176\u4ed6\u5e73\u5747\u5f8b\u4e50\u5668\uff08\u5409\u4ed6\uff0c\u94a2\u7434\uff0cMIDI\u952e\u76d8\uff09\u534f\u540c\u5de5\u4f5c\u65f6\uff0c\u4f60\u5e94\u4f7f\u7528MIDI\u503c\u3002\u5f53\u4e0e\u975e\u54c1\u683c\uff08fretless\uff09\u5f26\u4e50\u6216\u4eba\u58f0\u5408\u4f5c\u65f6\uff0c\u4e3a\u4ec0\u4e48\u4e0d\u4ec5\u4ec5\u4f7f\u7528\u58f0\u8c03\uff08intonation\uff09\uff1f\uff08\u4e3a\u4ec0\u4e48\u5148\u524d\u4ece\u6ca1\u6709\u4eba\u5411\u4f60\u63d0\u51fa\u8fd9\u4e2a\u9009\u62e9\uff1f\u56e0\u4e3a\u5728\u7535\u8111\u51fa\u73b0\u524d\uff0c\u6211\u4eec\u6ca1\u6709\u8db3\u591f\u7cbe\u51c6\u7684\u4e50\u5668\uff0c\u6216\u8005\u8bf4\u8db3\u591f\u7075\u6d3b\uff0c\u6765\u5141\u8bb8\u8fd9\u4e2a\u9009\u62e9\uff09\u6216\u8005\u56db\u5206\u97f3\uff0c\u4e2d\u97f3\uff0c\u6216\u6c49\u671d\u6dee\u5357\u5b50\u7684\u4e50\u5f8b\uff08\u539f\u6587\u4e3aLu scale\uff0c\u6211\u731c\u662f\u6307\u4e50\u5f8b\uff0c\u94fe\u63a5<\/a>\uff09\uff1f<\/p>\n
\u5982\u679c\u4f60\u8c03\u97f3\u5230\u6301\u7eed\u7684\u81ea\u7136\u97f3\u7a0b\uff0c\u4f60\u5c06\u78b0\u5230\u97f3\u8c03\u504f\u79fb\u7684\u60c5\u51b5\u3002\u5982\u679c\u4f60\u662f\u5192\u9669\u5bb6\uff0c\u4f60\u4f1a\u5c06\u8fd9\u89c6\u4e3a\u4e00\u4e2a\u6311\u6218\uff0c\u7136\u540e\u6df1\u5165\u81ea\u7531\u81ea\u7136\u58f0\u8c03\u7684\u4e16\u754c\u63a2\u8ba8\uff0c\u5728\u8fd9\u4e2a\u4e16\u754c\u91cc\uff0c\u504f\u79fb\u4e5f\u4f1a\u88ab\u4f5c\u4e3a\u662f\u6b63\u786e\u7684\u6765\u63a5\u53d7\u3002<\/p>\n
\u4e0b\u8fb9\u7684\u4f8b\u5b50\u91cc\uff0c\u6211\u5728\u4ee3\u7801\u65b9\u9762\u8df3\u5f97\u8fdc\u4e86\u4e00\u70b9\u3002\u4f60\u4e0d\u5fc5\u5f04\u61c2\u6bcf\u4e2a\u7ec6\u8282\u3002\u8fd9\u4e2apatch\u6f14\u594f\u4e86\u4e24\u4e2a\u7b80\u5355\u7684\u97f3\uff0c\u4e00\u4e2a\u5728\u5de6\u8fb9\uff0c\u4e00\u4e2a\u5728\u53f3\u8fb9\u3002\u5de6\u58f0\u9053\u7528\u81ea\u7136\u8c03\u97f3\u64cd\u4f5c\uff08\u6bcf\u4e2a\u97f3\u7a0b\u7528\u6bd5\u8fbe\u54e5\u62c9\u65af\u6bd4\u7387\uff08http:\/\/wehner.org\/pythag\/ratios.htm\uff09\u672a\u4f5c\u4efb\u4f55\u8c03\u6574\u6765\u8ba1\u7b97\uff09\u3002\u53f3\u58f0\u9053\u7528\u5e73\u5747\u5f8b\u97f3\u7a0b\u3002\u6bd5\u8fbe\u54e5\u62c9\u65af\u9017\u53f7<\/a>\uff08Pythagorean comma\uff09\u5c06\u5f71\u54cd\u5de6\u58f0\u9053\uff0c\u9891\u7387\u5c06\u504f\u79fb\uff08\u4e0e\u53f3\u58f0\u9053\u76f8\u6bd4\uff09\u3002\u5b83\u4eec\u6f14\u594f\u7684\u5e94\u8be5\u662f\u201c\u540c\u6837\u7684\u201d\u97f3\uff0c\u5982\u679c\u5b83\u4eec\u88ab\u4ee5\u540c\u6837\u7684\u65b9\u5f0f\u8c03\u97f3\u7684\u8bdd\u3002\u5f53\u5b83\u4eec\u6f02\u79fb\u5f00\u7684\u65f6\u5019\uff0c\u5e76\u975e\u7531\u4e8e\u5b83\u4eec\u505a\u51fa\u4e86\u4e0d\u540c\u7684\u9009\u62e9\uff0c\u800c\u662f\u7531\u4e8e\u8c03\u97f3\u65b9\u5f0f\uff0c\u7531\u4e8e\u6bd5\u8fbe\u54e5\u62c9\u65af\u8c03\u97f3\u7684\u504f\u79fb\u3002\u6211\u518d\u4e09\u68c0\u67e5\u4e86\u6211\u7684\u8ba1\u7b97\uff0c\u6211\u76f8\u4fe1\u5982\u679c\u6211\u9519\u4e86\u4f60\u4f1a\u7ea0\u6b63\u6211\uff0c\u4f46\u662f\u7684\uff0c\u5b83\u4eec\u8d70\u97f3\u5f97\u5982\u6b64\u4e4b\u5feb\uff0c\u5982\u6b64\u4e4b\u591a\u3002<\/p>\n
\u7b2c\u4e00\u4f8b\u9009\u53d6\u968f\u673a\u97f3\u7a0b\uff0c\u7b2c\u4e8c\u4e2a\u4ec5\u662f\u4e00\u4e2a\u97f3\u9636\uff08\u66f4\u597d\u7684\u5c55\u793a\u4e86\u97f3\u8c03\u504f\u79fb\uff09\u3002\u5f53\u6211\u4eec\u4e24\u8005\u4e00\u8d77\u542c\u7684\u65f6\u5019\uff0c\u53ef\u4ee5\u542c\u5230\u5b83\u4eec\u662f\u5f7c\u6b64\u8d70\u97f3\u7684\u3002\u4f46\u5982\u679c\u53ea\u542c\u5de6\u58f0\u9053\u7684\u8bdd\uff0c\u4f60\u80fd\u542c\u51fa\u504f\u79fb\u6765\u5417\uff1f<\/p>\n
\u7ec3\u4e60\uff0c\u81ea\u7136\u5f8b\u8c03\u97f3\uff0c\u5e73\u5747\u5f8b\u8c03\u97f3<\/h3>\n
13.9. \u8c03\u97f3<\/strong><\/p>\n
( \/\/\u53cc\u51fb\u4ee5\u9009\u53d6\u5168\u90e8\u4ee3\u7801\r\nSynthDef(\"PureTone\",\r\n{arg justFreq = 440, equalFreq = 440;\r\nOut.ar(0, SinOsc.ar([justFreq, equalFreq], mul: 0.4)\r\n          *EnvGen.kr(Env.perc(0, 1), doneAction:2));\r\n}).load(s);\r\nTask({\r\nvar jfreq = 440, efreq = 69, next = 6, equalInt, justInt;\r\nequalInt = [-10, -8, -7, -5, -3, -1,\r\n      0, 2, 4, 5, 7, 9, 11];\r\njustInt = [9\/16, 5\/8, 2\/3, 3\/4, 5\/6, 15\/16, 1\/1,\r\n      9\/8, 5\/4, 4\/3, 3\/2, 5\/3, 15\/8];\r\n      {\r\n      [equalInt[next], justInt.at(next).round(0.01)].post;\r\n      Synth(\"PureTone\", [\\justFreq, jfreq.round(0.01),\r\n            \\equalFreq, efreq.midicps.round(0.01)].postln);\r\n      next = 13.rand;\r\n      jfreq = jfreq*justInt.at(next);\r\n      efreq = efreq + equalInt.at(next);\r\n      if(jfreq < 100, {jfreq = jfreq*2; efreq = efreq + 12});\r\n      if(jfreq > 1000, {jfreq = jfreq\/2; efreq = efreq - 12});\r\n      [0.125, 0.125, 0.124, 0.25, 0.5, 1].choose.wait\r\n      }.loop;\r\n}).play(SystemClock);\r\n)<\/pre>\n
\/\/ \u53ea\u6709\u4e00\u4e2a\u97f3\u9636\u7684\u540c\u6837\u7684\u4f8b\u5b50\r\n( \/\/\u53cc\u51fb\u4ee5\u9009\u53d6\u5168\u90e8\u4ee3\u7801\r\nSynthDef(\"PureTone\",\r\n{arg justFreq = 440, equalFreq = 440;\r\nOut.ar(0, SinOsc.ar([justFreq, equalFreq], mul: 0.4)\r\n          *EnvGen.kr(Env.perc(0, 1), doneAction:2));\r\n}).load(s);\r\nTask({\r\nvar jfreq = 440, efreq = 69, next = 0, equalInt, justInt;\r\nequalInt = [-12, 2, 2, 1, 2, 2, 3];\r\njustInt = [1\/2, 9\/8, 9\/8, 16\/15, 9\/8, 9\/8, 6\/5];\r\n       {\r\n       [equalInt.wrapAt(next), justInt.wrapAt(next).round(0.01)].post;\r\n       Synth(\"PureTone\", [\\justFreq, jfreq.round(0.01),\r\n             \\equalFreq, efreq.midicps.round(0.01)].postln);\r\n       next = next + 1;\r\n       jfreq = jfreq*justInt.wrapAt(next);\r\n       efreq = efreq + equalInt.wrapAt(next); 0.25.wait\r\n       }.loop;\r\n}).play(SystemClock);\r\n)<\/pre>\n
\/\/ \u53ea\u6709\u81ea\u7136\u58f0\u8c03\r\n( \/\/\u53cc\u51fb\u4ee5\u9009\u53d6\u5168\u90e8\u4ee3\u7801\r\nSynthDef(\"PureTone\",\r\n{arg justFreq = 440, equalFreq = 440;\r\nOut.ar(0, SinOsc.ar([justFreq, equalFreq], mul: 0.4)\r\n          *EnvGen.kr(Env.perc(0, 1), doneAction:2));\r\n}).load(s);\r\nTask({\r\nvar jfreq = 440, efreq = 69, next = 0, equalInt, justInt;\r\nequalInt = [-12, 2, 2, 1, 2, 2, 3];\r\njustInt = [1\/2, 9\/8, 9\/8, 16\/15, 9\/8, 9\/8, 6\/5];\r\n        {\r\n        [equalInt.wrapAt(next), justInt.wrapAt(next).round(0.01)].post;\r\n        Synth(\"PureTone\", [\\justFreq, jfreq.round(0.01),\r\n               \\equalFreq, jfreq.round(0.01)].postln);\r\n        next = next + 1;\r\n        jfreq = jfreq*justInt.wrapAt(next);\r\n        efreq = efreq + equalInt.wrapAt(next); 0.25.wait\r\n        }.loop;\r\n}).play(SystemClock);\r\n)<\/pre>\n","protected":false},"excerpt":{"rendered":"
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