{"id":1255,"date":"2011-04-14T17:47:33","date_gmt":"2011-04-14T09:47:33","guid":{"rendered":"http:\/\/www.ccttours.com\/blog\/?p=1255"},"modified":"2011-04-14T17:51:19","modified_gmt":"2011-04-14T09:51:19","slug":"sc%ef%bc%9a%e7%94%a8if%e5%81%9a%e6%8e%a7%e5%88%b6%ef%bc%8c%e6%8e%a5%e7%9d%80do%ef%bc%8carrays%ef%bc%8cmidiin%ef%bc%8c%e8%ae%a1%e7%ae%97%e6%9c%ba%e8%be%85%e5%8a%a9%e5%88%86%e6%9e%90","status":"publish","type":"post","link":"https:\/\/learn.travelchinawith.me\/?p=1255","title":{"rendered":"SC\uff1a\u7528if\u505a\u63a7\u5236\uff0c\u63a5\u7740do\uff0cArrays\uff0cMIDIIn\uff0c\u8ba1\u7b97\u673a\u8f85\u52a9\u5206\u6790"},"content":{"rendered":"

\u63a7\u5236\u6d88\u606f\u201cif\u201d<\/h3>\n

\u4eba\u5de5\u667a\u80fd\u548c\u8ba1\u7b97\u673a\u8f85\u52a9\u521b\u4f5c\u59cb\u4e8e\u903b\u8f91\u63a7\u5236\u3002\u5373\uff0c\u544a\u8bc9\u673a\u5668\u5728\u7279\u5b9a\u7684\u60c5\u51b5\u4e0b\u505a\u4ec0\u4e48\u3002\u5982\u679c\u4f60\u997f\u4e86\uff0cdo\u6253\u5f00\u51b0\u7bb1\u3002\u5982\u679c\u91cc\u8fb9\u6ca1\u6709\u9762\u5305\uff0c\u90a3\u4e48do\u53bb\u5546\u5e97\u3002\u5982\u679c\u4f60\u94b1\u591f\u591a\uff0cdo\u4e70\u56db\u5757\u70e4\u8089\u3002\u56de\u5bb6\u5e76\u518d\u6b21\u6253\u5f00\u51b0\u7bb1\u3002\u5982\u679c\u91cc\u8fb9\u6709\u679c\u51bb\u6216\u679c\u9171\uff0cdo\u9009\u5176\u4e00\u505a\u4e2a\u4e09\u660e\u6cbb\u3002\u4e0d\u8981\u7528\u814c\u8c46\u8150\u3002\u6709\u5f88\u591a\u8bf8\u5982while, for, \u548c forBy \u7b49\u8fed\u4ee3\u548c\u63a7\u5236\u7684\u65b9\u6cd5\uff0c\u4f46\u662fdo\u548cif\u662f\u6700\u666e\u904d\u7684\u3002<\/p>\n

if\u6d88\u606f\u6216\u51fd\u6570\u6709\u4e09\u4e2a\u5f15\u6570\uff1a\u4e00\u4e2a\u88ab\u8bc4\u4f30\u7684\u8868\u8fbe\u5f0f\uff0c\u4e00\u4e2atrue\u51fd\u6570\uff0c\u4ee5\u53ca\u4e00\u4e2afalse\u51fd\u6570\u3002\u5b83\u8bc4\u4f30\u8868\u8fbe\u5f0f\u662f\u771f\u662f\u5047\u5e76\u8fd4\u56de\u7ed3\u679c\u3002
\n<\/p>\n

if(\u8868\u8fbe\u5f0f, {\u771f\u51fd\u6570}, {\u5047\u51fd\u6570})<\/pre>\n
\u771f\u3001\u5047\u5e38\u7531\u8fd0\u7b97\u7b26\u6bd4\u5982\u5927\u4e8e\u3001\u5c0f\u4e8e\u6765\u5224\u65ad\uff08\u6ce8\u610f\u4e00\u4e2a\u7b49\u53f7\u548c\u4e24\u4e2a\u7b49\u53f7\u95f4\u7684\u533a\u522b\u3002\u201c=\u201d\u610f\u601d\u662f\u5c06\u67d0\u4e2a\u503c\u5b58\u5165\u53d8\u91cf\uff0c”==”\u610f\u601d\u662f\u201c\u76f8\u7b49\u5417\uff1f\u201d\uff09\u3002\u8fd0\u884c\u4e0b\u4f8b\u6bcf\u4e00\u884c\u3002\u7b2c\u4e00\u884c\u8bc4\u4f30\u5e76\u8fd4\u56de\u771f\uff08\u56e0\u4e3a1\u7684\u786e\u7b49\u4e8e1\uff09\u56e0\u6b64\u5b83\u8fd0\u884c\u7b2c\u4e00\u4e2a\u51fd\u6570\u3002\u7b2c\u4e8c\u4f8b\u662f\u5047\uff0c\u56e0\u6b64\u5047\u51fd\u6570\u88ab\u8fd0\u884c\u3002<\/p>\n
21.1. if \u8303\u4f8b<\/strong> <\/p>\n
if(1 == 1, {\"true statement\";},{\"false statement\";}) \r\n\r\nif(1 == 4, {\"true statement\";},{\"false statement\";}) \r\n\r\n\/\/ \u6ce8\u91ca\u7248: \r\nif( \r\n   1 == 1, \/\/\u88ab\u8bc4\u4f30\u7684\u8868\u8fbe\u5f0f; \"1\u7b49\u4e8e1\" \u5bf9\u8fd8\u662f\u9519? \r\n   {\"true statement\";}, \/\/\u5982\u679c\u662f\u5bf9\uff0c\u8fd0\u884c\u6b64\u884c \r\n   {\"false statement\";} \/\/\u5982\u679c\u662f\u9519\uff0c\u8fd0\u884c\u6b64\u884c \r\n)<\/pre>\n
\u4e0b\u8fb9\u662f\u5176\u4ed6\u7684\u5e03\u5c14\u8fd0\u7b97\u7b26
\n< \u5c0f\u4e8e\n> \u5927\u4e8e
\n<= \u5c0f\u4e8e\u6216\u7b49\u4e8e\n>= \u5927\u4e8e\u6216\u7b49\u4e8e
\n!= \u4e0d\u7b49\u4e8e
\n== \u7b49\u4e8e<\/code><\/p>\n
\u6d88\u606for<\/em> \u5408\u5e76\u4e24\u4e2a\u58f0\u660e\uff0c\u5982\u679c\u4e24\u8005\u4e4b\u4e00\u662f\u5bf9\u7684\u5219\u8fd4\u56de\u771f\uff1aor(a > 20, b > 100)<\/em>\u3002\u6d88\u606fand \u5408\u5e76\u4e24\u4e2a\u58f0\u660e\uff0c\u53ea\u6709\u5f53\u4e24\u8005\u90fd\u5bf9\u65f6\u8fd4\u56de\u771f\uff1aand(a > 20, b > 100)<\/em>\u3002\u5355\u8bcdtrue\u662f\u771f\uff0cfalse\u662f\u5047\u3002<\/p>\n
21.2. if \u8303\u4f8b<\/strong> <\/p>\n
if((1 == 1).and(5 < 7), {\"\u5168\u90e8\u90fd\u5bf9\"},{\"\u53ea\u6709\u4e00\u4e2a\u5bf9\";}) \r\n\r\nif((1 == 20).and(5 < 7), {\"\u5168\u90e8\u90fd\u5bf9\";},{\"\u4e00\u4e2a\u9519\u6216\u5168\u9519\";}) \r\n\r\nif((1 == 4).or(true), {\"\u5bf9\u6c38\u8fdc\u662f\u5bf9\";},{\"1\u4e0d\u7b49\u4e8e4\";}) \r\n\r\nif(false.or(true), {\"\u5bf9\u6c38\u8fdc\u662f\u5bf9\";},{\"\u5bf9\u7528\u6216\u8005\uff08or\uff09\u8d62\u4e86\";}) \r\n\r\nif(false.and(true), {\"\u5bf9\u6c38\u8fdc\u662f\u5bf9\";},{\"\u4f46\u9519\u7528\u548c\uff08and\uff09\u8d62\u4e86\";}) \r\n\r\nif(or(10 > 0, 10 < 0), {34},{78}) \r\n\r\nif((1 == 1).and((10 > 0).or((5 < 0).or(100 < 200))), {78},{88})<\/pre>\n
\u8fd9\u4e9b\u5b64\u7acb\u7684\u6570\u4f8b\u5728\u6ca1\u6709\u4e0a\u4e0b\u6587\u5173\u7cfb\u5bf9\u7167\u65f6\u663e\u5f97\u83ab\u540d\u5176\u5999\uff08\u6bd4\u5982\uff0c\u4e3a\u4ec0\u4e48\u6211\u4f1a\u7528\u5230\u8868\u8fbe\u5f0f 10>0\uff1f\u4e3a\u4ec0\u4e48\u4f60\u4ec5\u4ec5\u662f\u5217\u5370\u201c\u771f\u201d\u6216\u201c\u5047\u201d\uff1f\uff09if\u51fd\u6570\u5e38\u88ab\u7528\u4e8e\u4e0e\u4e00\u4e9b\u8fed\u4ee3\u8fc7\u7a0b\u6bd4\u5982do\u7ed3\u5408\u4f7f\u7528\u3002\u4e0b\u8fb9\u662f\u4e00\u4e2a\u771f\u5b9e\u7684\u97f3\u4e50\u8303\u4f8b\u3002\u4e0b\u8fb9\u7684\u4ee3\u7801\u7531MIDI\u503c60\uff08C4\uff09\u5f00\u59cb\u3002\u7136\u540e\u5b83\u9009\u53d6\u4e00\u4e2a\u65b0\u7684MIDI\u97f3\u7a0b\uff0c\u5c06\u5b83\u52a0\u5230m\u5e76\u8fd4\u56de\u90a3\u4e2a\u65b0\u503c\u3002\u89c2\u5bdf\u7ed3\u679c\u3002 <\/p>\n
21.3. do 50 MIDI\u97f3\u7a0b <\/strong><\/p>\n
( \r\nm = 60; \r\n50.do( \r\n   { \r\n   m = m + [6, 7, 4, 2, 11, 8, -2, -6, -1, -3].choose; \r\n   m.postln; \r\n   } \r\n) \r\n)<\/pre>\n
\u6211\u503e\u5411\u4e8e\u66f4\u591a\u9ad8\u4f4e\u97f3\u7a0b\u8d77\u4f0f\u7684\u9009\u62e9\u3002\u56e0\u6b64\u6700\u540eMIDI\u503c\u8d85\u8fc7\u4e86\u4e00\u4e2a\u5bf9\u4e8e\u7edd\u5927\u591a\u6570\u4e50\u5668\u6765\u8bf4\u5408\u7406\u7684\u8303\u56f4\u3002\u5373\u4f7f\u6211\u5df2\u5c0f\u5fc3\u7684\u5e73\u8861\u4e86\u8fd9\u4e2a\u9009\u62e9\uff0c\u4f46\u5728\u4e00\u5217\u5185\u4e00\u4e2a\u6b63\u503c\u5c06\u88ab\u9009\u62e920\u6b21\u662f\u5f88\u660e\u663e\u7684\u3002\u4e0b\u8fb9\u7684if\u8868\u8ff0\u68c0\u67e5\u6bcf\u6b21\u5faa\u73af\u540e\u7684\u503c\uff0c\u5982\u679c\u8d85\u8fc784\u5219\u51cf\u53bb\u4e24\u4e2a\u516b\u5ea6\uff0c\u5982\u679c\u4f4e\u4e8e36\u5219\u589e\u52a0\u4e24\u4e2a\u516b\u5ea6\u3002 <\/p>\n
21.4. do 50 MIDI\u97f3\u7a0b<\/strong> <\/p>\n
( \r\nm = 60; \r\n50.do( \r\n   { \r\n   var next; \r\n   next = [6, 17, 14, 2, 11, 8, -12, -16, -1, -3].choose; \r\n   \"next interval is : \".post; next.postln; \r\n   m = m + next; \r\n   \"before being fixed: \".post; m.post; \r\n   if(m > 72, {m = m - 24}); \r\n   if(m < 48, {m = m + 24}); \r\n   \"after being fixed: \".post; m.postln; \r\n   } \r\n) \r\n)<\/pre>\n
\u5f53\u5199\u7c7b\u4f3c\u8fd9\u6837\u7684\u5c0f\u7247\u6bb5\u65f6\uff0c\u5728SC\u91cc\u8fb9\u95f2\u901b\u4e00\u4e0b\uff0c\u770b\u770b\u662f\u5426\u5df2\u7ecf\u6709\u67d0\u4e2a\u51fd\u6570\u5b58\u5728\u5e76\u80fd\u505a\u4f60\u60f3\u505a\u7684\u4e8b\u60c5\u662f\u503c\u5f97\u7684\u3002wrap<\/em>\uff0c\u5b83\u4f1a\u5c06\u4e00\u4e2a\u503c\u5305\u88f9\u8d77\u6765\uff0c\u4f46\u5728\u672c\u4f8b\u4e2d\uff0c\u6211\u4eec\u505a\u7684\u662f\u7f13\u51b2\uff08buffering\uff09\u800c\u4e0d\u662f\u5305\u88f9\uff08wrapping\uff09\u3002\u56e0\u6b64\u5728\u8fd9\u4e2a\u72b6\u51b5\u4e0b\uff0c\u6211\u4eec\u5fc5\u987b\u5f97\u8981\u52a0\u5165\u989d\u5916\u7684\u4ee3\u7801\u3002<\/p>\n
\u4e0b\u4f8b\u5c55\u793a\u4e86\u5728\u4e00\u4e2a\u97f3\u7c7b\u6570\u7ec4\u4e2d\u7684do\u5faa\u73af\u4e0eif\u534f\u540c\u6d4b\u8bd5\u67e5\u627eC\uff0cD\u6216E\u3002\u7535\u8111\u4e0d\u53ef\u80fd\u6309\u5b9e\u9645\u7684\u97f3\u53bb\u7406\u89e3\u8fd9\u4e9b\uff08\u770b\u4e0b\u8fb9\u5f26\u4e50\u7684\u8ba8\u8bba\uff09\uff0c\u5b83\u4eec\u770b\u5230\u7684\u53ea\u662f\u6587\u5b57\u3002\u5373\u4f7f\u5982\u6b64\uff0c\u5b83\u4ecd\u80fd\u6bd4\u8f83\u5b83\u4eec\u662f\u5426\u76f8\u7b49\u3002 <\/p>\n
21.5. \u97f3\u7c7b do <\/strong><\/p>\n
( \r\n[\"C\", \"C#\", \"D\", \"Eb\", \"E\", \"F\", \"F#\", \"G\", \"Ab\", \"A\", \"Bb\", \"B\"].do( \r\n   {arg item, count; \r\n      if((item == \"C\").or(item == \"E\").or(item == \"G\"), \/\/\u5e03\u5c14\u6d4b\u8bd5 \r\n         {item.post; \" is part of a C chord.\".postln;}, \/\/\u5bf9\u51fd\u6570 \r\n         {item.post; \" is not part of a C chord\".postln;} \/\/\u9519\u51fd\u6570 \r\n         ) \r\n      } \r\n   ) \r\n)<\/pre>\n
\u4f60\u53ef\u4ee5\u8bf4\u6211\u4eec\u5c06\u4f1a\u4e86\u8ba1\u7b97\u673a\u8ba4\u8bc6C\u548c\u5f26\u3002\u8fd9\u4fbf\u662f\u4eba\u5de5\u667a\u80fd\u5f00\u59cb\u7684\u5730\u65b9\u3002 <\/p>\n
if\u8868\u8fbe\u5f0f<\/em>\u4e5f\u53ef\u7528\u4e8e\u5728\u8367\u5e55\u4e0a\u5b9a\u4e49\u4e00\u4e2a\u533a\u57df\u3002\u5f53\u9f20\u6807\u8fdb\u5165\u6307\u5b9a\u7684\u533a\u57df\u751f\u6210\u4e00\u4e2a\u6b63\u503c\uff0c\u6216\u4e00\u4e2a\u89e6\u53d1\u5668\u3002\u5728\u672c\u4f8b\u4e2d\uff0c* \u76f8\u5f53\u4e8e\u548c\uff08and\uff09\u3002\u8fd9\u91cc\u6ca1\u6709\u5bf9\u9519\uff0c\u53ea\u6709\u503c1\uff08\u5f00\u542f\uff09\u548c0\uff08\u5173\u95ed\uff09\u3002 <\/p>\n
21.6. \u9f20\u6807\u533a\u57df\u89e6\u53d1\u5668<\/strong> <\/p>\n
( \r\n{ \r\nvar aenv, fenv, mgate, mx, my; \r\nmx = MouseX.kr(0, 1); \r\nmy = MouseY.kr(0, 1); \r\nmgate = if((mx>0.3) * (mx<0.5) * (my>0.3) * (my<0.7), 1, 0); \r\naenv = EnvGen.kr(Env.asr(0.1, 0.5, 2), mgate); \r\nfenv = EnvGen.kr(Env.asr(1, 1, 2), mgate, 1000, 100); \r\nRLPF.ar(Saw.ar(100)*aenv, fenv, 0.1) \r\n}.play \r\n)<\/pre>\n
\u4e00\u4e2a\u4f7f\u7528if\u5f88\u68d2\u7684\u5c0f\u6280\u5de7\u63a7\u5236\u4f55\u65f6postln<\/em>\u800c\u4e0d\u662fpost<\/em>\uff0c\u8fd9\u5e76\u4e0d\u5217\u5370\u65b0\u7684\u4e00\u884c\uff1a <\/p>\n
21.7. \u65b0\u884c<\/strong> <\/p>\n
( \r\n100.do( \r\n   { \r\n      arg count; \r\n      100.rand.post; \r\n      if(count%10 == 9, \/\/\u6bcf\u4e2a\u7b2c9\u6b21 \r\n         {\" new line: \".postln;}, \/\/\u5217\u5370\u4e00\u4e2a\u56de\u8f66 \r\n         {\" : \".post;} \/\/\u4ec5\u662f\" * \"\uff0c\u6ca1\u6709\u56de\u8f66 \r\n         ); \r\n   } \r\n) \r\n)<\/pre>\n
while<\/h3>\n
while<\/em>\u51fd\u6570\u5728\u7b2c\u4e00\u4e2a\u5f15\u6570\uff08\u4e00\u4e2a\u8bc4\u4f30\u51fd\u6570\uff09\u8fd4\u56de\u9519\u8bef\u524d\u91cd\u590d\u7b2c\u4e8c\u5f15\u6570\uff08\u4e00\u4e2a\u51fd\u6570\uff09\u3002\u5b83\u5bf9\u65b0\u624b\u6765\u8bf4\u662f\u4e00\u4e2a\u5371\u9669\u7684\u5de5\u5177\u3002\u5982\u679c\u4f60\u5199\u4e00\u4e2a\u6c38\u8fdc\u4e0d\u4f1a\u8fd4\u56de\u5047\u7684\u6761\u4ef6\uff0cSC\u5c06\u6c38\u8fdc\u8fd0\u884c\u4e0b\u53bb\uff08\u8fd9\u662f\u591a\u6570\u60c5\u51b5\u4e0b\u9020\u6210\u7a0b\u5e8f\u9501\u6b7b\u7684\u539f\u56e0\uff09\u3002\u4e0b\u8fb9\u7b2c\u4e00\u4f8b\u5c55\u793a\u4e86\u4e00\u4e2a\u5e38\u89c1\u7684\u9519\u8bef\u3002\u4ee3\u7801\u5728\u7b2c\u4e8c\u4e2a\u51fd\u6570\u5728\u53d8\u91cfa\u4e2d\u5b58\u50a8\u53d8\u91cf10\u524d\u4f1a\u6301\u7eed\u91cd\u590d\u3002\u4f4610.rand\u53ea\u80fd\u9009\u53d60\u52309\u95f4\u7684\u6570\u5b57\uff0c\u56e0\u6b64\u5b83\u6c38\u8fdc\u9009\u4e0d\u523010\uff0c\u56e0\u6b64\u5728\u4f60\u5f3a\u884c\u505c\u6b62\u524d\u4f1a\u65e0\u9650\u8fd0\u884c\u4e0b\u53bb\u3002\u4e5f\u6b63\u56e0\u6b64\uff0c\u4e5f\u53ef\u4ee5\u5229\u7528\u5b83\u7ed9\u4e00\u4e2a\u800c\u5916\u7684\u6761\u4ef6\u4f7f\u7a0b\u5e8f\u505c\u6b62\u3002<\/p>\n
\u6700\u540e\u4e00\u884c\u5c55\u793a\u4e86while\u7684\u5178\u578b\u7528\u6cd5\u3002\u8fd9\u884c\u4ee3\u7801\u82f1\u544a\u8bc9\u4f60\u5b83\u4ece100\u4e2d\u9009\u5230\u6570\u5b5713\u6240\u7528\u7684\u65f6\u95f4\u957f\u77ed\u3002<\/p>\n
21.8. while<\/strong> <\/p>\n
\/\/ \u5178\u578b\u7684\u9519\u8bef\uff0c\u56e0\u4e3aa\u6c38\u8fdc\u4e0d\u4f1a\u7b49\u4e8e10 \r\na = 0; while({a != 10}, {a = 10.rand}) \/\/ \u6b7b\u5faa\u73af \r\n\r\n\/\/ \u5728\u7279\u5b9a\u6b21\u6570\u540e\u505c\u6b62\u663e\u5f97\u66f4\u5b89\u5168\u4e00\u4e9b? \r\n\/\/ \u6ce8\u610fand\u7684\u5199\u6cd5 \r\nc = 0; a = 0; \r\nwhile({and(a != 10, c < 100)}, {a = 10.rand; c = c + 1;}) \r\n\r\n\/\/while\u7684\u5178\u578b\u7528\u6cd5\u3002\u544a\u8bc9\u4f60\u4ece100\u4e2d\u6311\u523013\u9700\u8981\u591a\u957f\u65f6\u95f4\u3002 \r\n( \r\na = 0; c = 0; \r\nwhile({(a != 13).and(c < 10000)}, {a = 100.rand; c = c + 1;}); \r\nc \r\n)<\/pre>\n
for, forBy<\/h3>\n
for<\/em>\u5141\u8bb8\u4f60\u6307\u5b9a\u5faa\u73af\u7684\u5f00\u59cb\u4e0e\u7ed3\u675f\u70b9\uff0cforBy<\/em>\u5305\u542b\u4e00\u4e2a\u6b65\u8fdb\u503c\u5f15\u6570\u3002\u5728\u4e4b\u524d\u7684\u7ae0\u8282\uff0c\u6211\u4eec\u7528\u5947\u6570\u8c10\u6ce2\u5efa\u7acb\u4e86\u4e00\u4e2apatch\u3002\u8ba1\u6570\u5668\u7528\u4e8e\u8ba1\u7b97\u6bcf\u4e2a\u8c10\u6ce2\uff0c\u4f46\u7531\u4e8e\u5b83\u4ece0\u5f00\u59cb\uff0c\u6211\u4eec\u4e0d\u5f97\u4e0d\u52a01\uff08counter+1\uff09.\u6211\u4eec\u540c\u6837\u4e0d\u5f97\u4e0d\u4ec5\u4e3a\u5947\u6570\u8c10\u6ce2\u505a\u4e00\u70b9\u6570\u5b66\u8ba1\u7b97\u3002\u4f46\u6709\u4e86forBy<\/em>\uff0c\u8fd9\u4e2a\u8ba1\u7b97\u53ef\u4ee5\u88ab\u6574\u5408\u3002 <\/p>\n
21.9. for, forBy <\/strong><\/p>\n
34.for(84, {|i| i.midicps.postln}); \r\n\r\n34.forBy(84, 5, {|i| [i, i.midicps].postln}); \r\n\r\n1.forBy(24, 2, {|i| [i, i*500].postln}); \/\/ \u5947\u6570\u8c10\u6ce2 \r\n\r\n( \/\/ \u52a0\u6cd5\u65b9\u6ce2 \r\n{ \r\no = 0; \r\n1.forBy(24, 2, {|i| o = o + SinOsc.ar(i*500, mul: 1\/i)}); \r\no*0.4 \r\n}.scope \r\n)<\/pre>\n
MIDIIn<\/h3>\n
MIDIIn<\/em>\u4ece\u4e00\u4e2aMIDI\u8f93\u5165\u8bfb\u53d6\u6570\u636e\u3002\u6709\u5f88\u591a\u53ef\u7528\u7684\u65b9\u6cd5\u3002\u9996\u5148\u662f\u89e6\u53d1\u4e00\u4e2a\u4f60\u4e4b\u524d\u8bbe\u8ba1\u7684\u4e50\u5668\uff1a <\/p>\n
21.10. MIDI\u8f93\u5165\u89e6\u53d1SynthDef <\/strong><\/p>\n
( \r\n\/\/ \u5148\u5b9a\u4e49\u4e00\u4e2a\u4e50\u5668 \r\nSynthDef(\"simpleInst\", \r\n{ \r\narg midi = 60, vel = 60, inst; \r\ninst = { \r\n   SinOsc.ar( \r\n      freq: (midi.midicps)*(LFNoise0.kr(12) + 2).round(1), \r\n      mul: vel\/256) \r\n   }.dup(5) * \r\n   EnvGen.kr(Env.perc(0, 3), doneAction: 2); \r\nOut.ar(0, inst) \r\n} \r\n).play \r\n) \r\n\r\nMIDIIn.connect; \r\n\r\n( \r\n\/\/ \u7136\u540e\u5c06\u5b83\u94fe\u5230MIDI\u8f93\u5165 \r\nMIDIIn.noteOn = { \r\narg src, chan, midiNum, midiVelo; \r\nSynth(\"simpleInst\", [\\midi, midiNum, \\vel, midiVelo]); \r\n}; \r\n)<\/pre>\n
\u8981\u63a7\u5236\u5176\u4ed6SynthDef\u4e50\u5668\uff0c\u53ea\u9700\u7528\u4e50\u5668\u540d\u66ff\u6362\"simpleInst\"\u5e76\u786e\u4fdd\u6302\u4e0a\u8be5\u4e50\u5668\u5bf9\u5e94\u7684\u5f15\u6570\u5373\u53ef\u3002<\/p>\n
\u5b9e\u65f6\u7be1\u6539\uff08Real-Time Interpolation\uff09<\/h3>\n
MIDI\u8f93\u5165\u7684\u53e6\u4e00\u7528\u6cd5\u662f\u5728\u7ecf\u8fc7\u67d0\u4e9b\u4fee\u6539\u4e4b\u540e\uff0c\u5c06\u8f93\u5165\u53cd\u6620\u5230\u4f60\u7684MIDI\u8bbe\u5907\uff08\u6216\u5176\u4ed6\u8bbe\u5907\uff09\u3002\u4e4d\u4e00\u770b\uff0c\u8fd9\u770b\u8d77\u6765\u50cf\u4e00\u4e2a\u5f88\u597d\u7684\u6076\u4f5c\u5267\uff0c\u4f46\u540c\u6837\u53ef\u4ee5\u7528\u4e8e\u7be1\u6539\uff08interplotion\uff09\u3002\u7be1\u6539\u5229\u7528\u73b0\u5b58\u7ec4\u4ef6\u6bd4\u5982\u4e00\u4e2a\u5373\u5174\u5668\u7684\u7ed3\u6784\u6216\u76f4\u89c9\u7684\u6210\u5c31\uff0c\u5c06\u4e4b\u6620\u5c04\u5230\u4e00\u90e8\u5206\u6216\u5168\u90e8\u65b0\u6750\u6599\u7684\u97f3\u4e50\u5143\u7d20\u4e0a\u3002\u6bd4\u5982\u8bf4\uff0c\u4e00\u4e2a\u94a2\u7434\u5bb6\u53ef\u80fd\u5728\u5373\u5174\u65f6\u7528\u7235\u58eb\u5171\u6709\u7684\u5168\u97f3\u9636\u5c55\u793a\u6280\u5de7\uff0c\u4f46\u5982\u679c\u88ab\u8981\u6c42\u5305\u542b\u4e0d\u540c\u7684\u97f3\u9636\u6216\u6784\u601d\u300112\u97f3\u4f53\u7cfb\u3001\u5408\u6210\u97f3\u9636\uff0c\u6216\u590d\u6742\u7684\u8f6e\u5531\u6280\u672f\u65f6\u5c31\u50bb\u903c\u4e86\u3002\u901a\u8fc7\u8bfb\u53d6\u4ed6\u4f7f\u7528\u4ed6\u6240\u719f\u77e5\u7684\u6750\u6599\u8fdb\u884c\u7684\u5b9e\u65f6\u5373\u5174\uff0c\u4f60\u53ef\u4ee5\u5c06\u8fd9\u6d41\u7545\u7684\u76f4\u89c9\u601d\u7ef4\u6620\u5c04\u5230\u66f4\u590d\u6742\u7684\u5b9e\u9a8c\u4e0a\u3002 <\/p>\n
\u5728\u7be1\u6539\u6570\u636e\u65f6\uff0c\u4f60\u5e38\u4e0d\u5f97\u4e0d\u4f7f\u7528\u4e00\u4e2aif\u8868\u8fbe\u5f0f\u6dfb\u52a0\u4e00\u4e2a\u903b\u8f91\u8fc7\u6ee4\u5668\uff0c\u5141\u8bb8\u4e00\u4e9b\u6750\u6599\u4e0d\u4f5c\u6539\u53d8\u5c31\u901a\u8fc7\uff0c\u540c\u65f6\u6539\u53d8\u5176\u4ed6\u7684\u3002\u4e0b\u4f8b\u7528\u4e00\u79cd\u65b0\u5947\u7684\u65b9\u5f0f\u4f7f\u7528\u4e86\u8fc7\u6ee4\u5668\u3002\u7b2c\u4e00\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u5ef6\u8fdf\uff0c\u4f46\u5b83\u4ec5\u5728\u529b\u5ea6\u9ad8\u4e8e60\u7684\u60c5\u51b5\u4e0b\u88ab\u6dfb\u52a0\uff0c\u4f7f\u7528\u4e00\u4e2aif\u8868\u8fbe\u5f0f\u4f5c\u4e3a\u8fc7\u6ee4\u5668\u3002\u529b\u5ea660\u4ee5\u4e0b\u4e0d\u4f5c\u6539\u53d8\u7136\u540e\u901a\u8fc7\u3002 <\/p>\n
\u7b2c\u4e8c\u53d6MIDI\u8f93\u5165\u5e76\u5728C4\u8f74\u53cd\u5411\u540e\u5c06\u4e4b\u53cd\u5c04\u5230MIDI\u8bbe\u5907\u3002\u7136\u800c\uff0cif\u8868\u8fbe\u5f0f\u53ea\u641c\u5bfb\u767d\u952e([0, 2, 4, 5, 7, 9, 11]%12)\u5e76\u4ec5\u5c06\u53cd\u5411\u6dfb\u52a0\u5230\u90a3\u4e9bMIDI\u503c\u4e0a\u3002\u9ed1\u952e\u4e0d\u88ab\u53cd\u5411\u3002\u56e0\u6b64\u5e03\u9c81\u65af\u97f3\u9636C4, D4, Eb4, E4, F4, F#4, G4, A4, Bb4, C5 \u5c06\u53d8\u4e3a C4, Bb3, Eb4, Ab3, G3, F#4, F3, Eb3, Bb4, C3\u3002\u4e0d\u6d88\u8bf4\uff0c\u8fd9\u771f\u7684\u53ef\u4ee5\u6446\u8131\u4e00\u4e2a\u6f14\u594f\u8005\uff0c\u56e0\u6b64\u4e3a\u4e86\u6548\u7387\uff0c\u4ed6\u4eec\u5e94\u8be5\u8131\u79bb\u76d1\u542c\u6b63\u786eMIDI\u4fe1\u606f\u7684\u8033\u673a\uff0c\u5728\u542c\u4f17\u4ec5\u542c\u5230\u7be1\u6539\u7248\u7684\u65f6\u5019\uff0c\u6fc0\u53d1\u7cbe\u786e\u53cd\u9988\u7684\u76f4\u89c9\u5373\u5174\u3002\u7528\u591a\u5c42\u3001\u53e4\u5178\u3001\u5373\u5174\u3001\u4e0d\u5bfb\u5e38\u97f3\u9636\u3001\u8c03\u8c10\u3001\u6539\u826f\u7684\u8282\u594f\u7b49\u7b49\u5c1d\u8bd5\u8fd9\u4e2a\u3002\u53ef\u80fd\u6027\u662f\u65e0\u9650\u7684\u3002 <\/p>\n
21.11. \u901a\u8fc7if() \u8fc7\u6ee4\u5668\u8fdb\u884cMIDI\u8f93\u5165\u7be1\u6539 <\/strong><\/p>\n
\/\/ \u4e3a\u529b\u5ea6\u9ad8\u4e8e60\u7684\u505a\u7b80\u5355\u5ef6\u8fdf \r\n( \r\nMIDIIn.noteOn = {arg src, chan, num, vel; \r\nvar delay = 0.5; \r\nthisThread.clock.sched(delay, {m.noteOn(1, num, vel)}); \r\n}; \r\nMIDIIn.noteOff = {arg src, chan, num, vel; \r\nvar delay = 0.5; \r\nthisThread.clock.sched(delay, {m.noteOff(1, num, vel)}); \r\n}; \r\n) \r\n\r\n\/\/ \u7be1\u6539: \u4ec5\u53cd\u5411\u767d\u952e \r\n( \r\nvar white; \r\nwhite = [0, 2, 4, 5, 7, 9, 11]; \r\n\r\nMIDIIn.noteOn = {arg src, chan, num, vel; \r\n\r\nif(white.includes(num%12), \r\n   {m.noteOn(1, (60 - num) + 60, vel);}, \r\n   {m.noteOn(1, num, vel)}); \r\n}; \r\n\r\nMIDIIn.noteOff = {arg src, chan, num, vel; \r\n\r\nif(white.includes(num%12), \r\n   {m.noteOff(1, (60 - num) + 60, vel);}, \r\n   {m.noteOff(1, num, vel)}); \r\n}; \r\n)<\/pre>\n
\u5206\u6790<\/h3>\n
MIDI\u8f93\u5165\u6700\u540e\u7684\u7528\u5904\u662f\u505a\u5206\u6790\u3002\u4e0b\u4f8b\u8bfb\u53d6MIDI\u503c\uff0c\u8ba1\u7b97\u8ddd\u4e0a\u4e2a\u503c\u7684\u97f3\u7a0b\uff0c\u7136\u540e\u5c06\u90a3\u4e2a\u503c\u5b58\u5165\u4e00\u4e2a\u6570\u7ec4\uff0c\u56e0\u6b64\u53ef\u4ee5\u6301\u7eed\u8bb0\u5f55\u4e00\u4e2a\u97f3\u4e50\u5bb6\u6216\u5373\u5174\u6f14\u594f\u5bb6\u4f7f\u7528\u6bcf\u4e2a\u97f3\u7a0b\u7684\u9891\u5ea6\u3002\u6709\u4e24\u4e2a\u7248\u672c\u3002\u7b2c\u4e00\u4e2a\u4ee5\u79fb\u52a8\u5230\u4efb\u4f55\u97f3\u7684\u52a8\u4f5c\u6765\u8ba1\u6570\u97f3\u7a0b\uff0c\u4e0d\u7ba1\u662f\u5347\u662f\u964d\uff0c\u5373\u4f7f\u5012\u7f6e\uff08\u4e0a\u8fb9\u8fd9\u6bb5\u8bdd\u7684\u539f\u6587\uff1aThe first counts an interval as motion to any pitch, whether up or down, as the same interval since they are inversions\u3002\u7ffb\u8bd1\u81f3\u6b64\uff0c\u5ffd\u7136\u4e00\u9635\u5934\u6655\uff0c\u518d\u52a0\u4e0aCottle\u8bf4\u8bdd\u7231\u7ed5\u7684\u5199\u4f5c\u98ce\u683c\uff0c\u56e0\u6b64\u4e0d\u786e\u5b9a\u80fd\u5fe0\u5b9e\u53cd\u6620\u539f\u6587\u610f\u601d\u3002\u5148\u653e\u7740\uff0c\u60f3\u5230\u597d\u7684\u7ffb\u8bd1\u518d\u4fee\u6b63\u3002\uff09\uff1aC4\u5347\u5230G4\uff08\u4e94\u5ea6\uff09\u88ab\u8bb0\u5f55\u5f97\u4e0eC4\u964d\u5230G3\uff08\u964d4\u5ea6\uff09\u4e00\u6837\u3002\u7b2c\u4e8c\u7248\u672c\uff0c\u5728\u4f8b\u5b50\u4e2d\u88ab\u6ce8\u91ca\u4e86\uff0c\u4ee5\u76f8\u7b49\u8ba1\u6570\u97f3\u7a0b\u5347\u964d\uff1aC4\u5347\u5230G4\uff08\u4e94\u5ea6\uff09\u4e0eC4\u964d\u5230F3\uff08\u964d5\u5ea6\uff09\u4e00\u6837\u3002<\/p>\n
21.12. \u7528if()\u8fc7\u6ee4\u5668\u505aMIDI\u8f93\u5165\u7be1\u6539<\/strong><\/p>\n
(\r\n\/\/ \u8fd0\u884c\u6b64\u4ee5\u5f00\u59cb\u8bfb\u53d6\u8f93\u5165\r\n\r\nvar previousPitch = 62, thisInterval;\r\n~intervals = Array.fill(12, {0});\r\n\r\nMIDIIn.noteOn = {arg src, chan, num;\r\n\/\/ \u8ba1\u6570\u5012\u7f6e\u4e3a\u4e00\u6837 Counts inversions as the same\r\nthisInterval = (12 - (previousPitch - num))%12;\r\n\/\/ \u8ba1\u6570\u97f3\u7a0b\u5347\u964d\u4e3a\u4e00\u6837 Counts intervals up or down as the same\r\n\/\/ thisInterval = abs(previousPitch - num);\r\n\r\n\/\/ \u53cd\u6ce8\u91ca\u4ee5\u76d1\u89c6\u503c\r\n\/\/ [previousPitch, num, thisInterval].postln;\r\n\r\n~intervals.put(thisInterval, ~intervals.at(thisInterval) + 1);\r\npreviousPitch = num;\r\n\r\n\/\/ \u53cd\u6ce8\u91ca\u4ee5\u5b9e\u65f6\u67e5\u770b\r\n\/\/ ~intervals.postln;\r\n};\r\n)\r\n\r\n\/\/ \u4e00\u5207\u5c31\u7eea\u540e\uff0c\u8fd0\u884c\u6b64\u884c\r\n~intervals;<\/pre>\n","protected":false},"excerpt":{"rendered":"
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