{"id":1235,"date":"2011-03-28T17:38:23","date_gmt":"2011-03-28T09:38:23","guid":{"rendered":"http:\/\/www.ccttours.com\/blog\/?p=1235"},"modified":"2011-03-28T17:44:16","modified_gmt":"2011-03-28T09:44:16","slug":"sc%ef%bc%9akarplusstrong%ef%bc%8c%e5%90%88%e6%88%90%e5%99%a8%e5%ae%9a%e4%b9%89%ef%bc%8c%e4%bc%ba%e6%9c%8d%e5%99%a8%e5%91%bd%e4%bb%a4","status":"publish","type":"post","link":"https:\/\/learn.travelchinawith.me\/?p=1235","title":{"rendered":"SC\uff1aKarplus\/Strong\uff0c\u5408\u6210\u5668\u5b9a\u4e49\uff0c\u4f3a\u670d\u5668\u547d\u4ee4"},"content":{"rendered":"

\u7c7b\u4f3c\u949f\u9e23\u548cKlank\uff0cKarplus\/Strong<\/a> \u201c\u626f\u201d\u4e5f\u662f\u7531\u566a\u97f3\u5f00\u59cb\u7684\u7269\u7406\u6a21\u578b\u3002\u5b83\u6a21\u4eff\u4e00\u6839\u88ab\u62c9\u626f\u7684\u5f26\uff0c\u7531\u624b\u6307\u6216\u5339\u514b\u7684\u62e8\u52a8\u89e6\u53d1\uff0c\u590d\u5236\u4e86\u5728\u4e24\u7aef\u6447\u6446\u7684\u4e8b\u4ef6\u3002 <\/p>\n

\u5728\u8f83\u65e9\u7684\u7ae0\u8282\uff0c\u6211\u4eec\u901a\u8fc7\u590d\u5236\u4e00\u4e2a\u5343\u5206\u4e4b\u4e00\u79d2\u7684\u91c7\u6837\u5e76\u5c06\u5b83\u4e0d\u65ad\u7c98\u8d34\u5165\u4e00\u4e2a\u65b0\u7684\u6587\u4ef6\u6765\u4ece\u566a\u97f3\u4e2d\u521b\u9020\u4e00\u4e2a\u5468\u671f\u6ce2\u3002Karplus\/Strong\u4f7f\u7528\u4e00\u4e2a\u5ef6\u8fdfUGen\u8fbe\u5230\u4e86\u540c\u6837\u7684\u6548\u679c\u3002\u4e00\u4e2a\u566a\u97f3\u7684\u7206\u53d1\u88ab\u91ca\u653e\u5165\u4e00\u95f4\u56de\u97f3\u5ba4\uff0c\u91cd\u590d\u548c\u8870\u51cf\u7684\u56de\u97f3\u7ec4\u6210\u4e86\u90a3\u4e2a\u7206\u53d1\u7684\u5468\u671f\u91cd\u590d\uff0c\u5982\u679c\u8fd9\u4e2a\u91cd\u590d\u6301\u7eed\u7684\u65f6\u95f4\u591f\u77ed\u7684\u8bdd\uff0c\u4fbf\u53ef\u4ee5\u5c06\u4e4b\u89c6\u4e3a\u4e00\u4e2a\u97f3\u3002
\n<\/p>\n

Karplus-Strong\u5f26\u4e50<\/h3>\n

\u6211\u4eec\u9996\u5148\u4ece\u4e00\u4e2a\u77ed\u4fc3\u7684\u566a\u97f3\u7206\u53d1\u5f00\u59cb\uff08\u7c7b\u4f3c\u949f\u9e23\uff09\u3002 <\/p>\n

17.1. \u566a\u97f3\u7206\u53d1<\/strong> <\/p>\n

( \r\n{ \r\n   var burstEnv, att = 0, dec = 0.001; \/\/\u58f0\u660e\u53d8\u91cf \r\n   burstEnv = EnvGen.kr(Env.perc(att, dec), gate: Impulse.kr(1)); \/\/\u5305\u7edc \r\n   PinkNoise.ar(burstEnv); \/\/\u566a\u97f3, \u7531burstEnv\u63a7\u5236\u632f\u5e45 \r\n}.play \r\n)<\/pre>\n
\u5ef6\u8fdf<\/h3>\n
\u4e0b\u4e00\u6b65\u662f\u5c06\u8fd9\u4e2a\u566a\u97f3\u7206\u53d1\u4f20\u9001\u81f3\u56de\u97f3\u5ba4\uff1bCombL<\/em>\uff0c\u5b83\u6709\u5982\u4e0b\u5f15\u6570\uff1ain, maxdelaytime, delayTime, decayTime, mul, add<\/em>\u3002\u8f93\u5165\u5c06\u662f\u6211\u4eec\u521a\u624d\u521b\u5efa\u7684\u566a\u97f3\u3002\u5ef6\u8fdf\u65f6\u95f4\u548c\u6700\u5927\u5ef6\u8fdf\u65f6\u95f4\u4e0e\u672c\u4f8b\u76f8\u540c\u3002\u5b83\u4eec\u4ee3\u8868\u4e86\u4fe1\u53f7\u88ab\u5ef6\u8fdf\uff08\u56de\u97f3\uff09\u7684\u65f6\u95f4\u603b\u91cf\uff0c\u4ee5\u79d2\u8ba1\u3002\u8870\u51cf\u65f6\u95f4\u662f\u56de\u97f3\u5ef6\u7eed\u7684\u65f6\u95f4\u3002\u8bd5\u8bd5\u6539\u53d8\u5ef6\u8fdf\u65f6\u95f4\u548c\u8870\u51cf\u65f6\u95f4\u770b\u770b\u3002gate\u9891\u7387\u88ab\u8bbe\u4e3adelayDecay\u6301\u7eed\u65f6\u95f4\u7684\u5012\u6570\uff0c\u56e0\u6b64\u4e00\u4e2a\u65b0\u7684impulse\u5c06\u5728\u4e4b\u524d\u7684\u566a\u97f3\u7206\u53d1\u6d88\u5931\u540e\u89e6\u53d1\u53e6\u4e00\u4e2a\u566a\u97f3\u3002 <\/p>\n
17.2. \u5177\u6709\u5ef6\u8fdf\u7684\u566a\u97f3\u7206\u53d1<\/strong> <\/p>\n
( \r\n{ \r\n   var burstEnv, att = 0, dec = 0.001; \r\n   var out, delayTime = 0.5, delayDecay = 10; \r\n   burstEnv = EnvGen.kr(Env.perc(att, dec), gate: Impulse.kr(1\/delayDecay)); \r\n   out = PinkNoise.ar(burstEnv); \r\n   out = out + CombL.ar( \r\n      out, \r\n      delayTime, \r\n      delayTime, \r\n      delayDecay); \/\/\u56de\u97f3\u5ba4 \r\n   out \r\n}.play \r\n)<\/pre>\n
\u4e3a\u4ec0\u4e48\u4f7f\u7528\u566a\u97f3\u4f5c\u4e3a\u4e00\u4e2a\u6fc0\u52b1\u6e90\uff1f\u6ce8\u610f\u6bcf\u4e2a\u62c9\u626f\u58f0\u90fd\u6709\u4e9b\u8bb8\u5dee\u522b\u3002\u8fd9\u662f\u56e0\u4e3a\u6bcf\u4e2a\u65b0\u7684\u566a\u97f3\u7206\u53d1\u90fd\u4f1a\u4e0e\u524d\u4e00\u4e2a\u6709\u7740\u8f7b\u5fae\u7684\u5dee\u522b\uff08\u4e0d\u662f\u56de\u97f3\uff0c\u800c\u662f\u6700\u521d\u7684\u7206\u53d1\uff09\u3002\u7ed3\u679c\u662f\u5fae\u5999\u7684\uff0c\u9664\u4e86\u58f0\u97f3\u7684\u81ea\u7136\u53d8\u594f\u3002\u5728\u4e0b\u4f8b\u4e2d\uff0c\u6211\u4e3a\u540c\u6837\u7684\u566a\u97f3\u7206\u53d1\u89e6\u53d1\u5668\u52a0\u5165\u4e86\u4e00\u4e2aRandSeed<\/em>\u3002\u5f53\u53d6\u6d88\u6ce8\u91ca\u540e\uff0c\u8fd9\u7c92\u79cd\u5b50\u5c06\u4f1a\u91cd\u7f6e\u6570\u5b57\u751f\u6210\u5668\uff0c\u4e8e\u662f\u4f60\u6bcf\u6b21\u90fd\u5c06\u5f97\u5230\u540c\u6837\u7684\u566a\u97f3\u7206\u53d1\u3002\u6ce8\u610f\u6240\u6709\u7684\u62c9\u626f\u90fd\u4ee5\u540c\u6837\u7684\u65b9\u5f0f\u53d1\u58f0\u3002 <\/p>\n
\u5c06\u5ef6\u8fdf\u65f6\u95f4\u6539\u4e3a0.1\uff08\u6bcf\u79d2\u5341\u6b21\uff0c\u621610Hz\uff09\uff0c0.01\uff08\u6bcf\u79d2100\u6b21\uff0c\u6216100Hz\uff09\uff0c0.001\uff081000Hz\uff09\u7b49\u7b49\u3002\u5ef6\u8fdf\u65f6\u95f4\u662f\u6211\u4eec\u542c\u5230\u7684\u97f3\u7684\u5012\u6570\uff08\u4e00\u79d2\u76841\/100th\uff0c100Hz\uff09\u3002\u5bf9A440\u6765\u8bf4\uff0c\u8be5\u586b\u5165\u4ec0\u4e48\u5ef6\u8fdf\u65f6\u95f4\u5462\uff1f <\/p>\n
\u6ce8\u610f\u5728\u4e4b\u524d\u7ae0\u8282\u4e2d\uff0c\u5173\u4e8e\u6301\u7eed\u65f6\u95f4\u548c\u9891\u7387\u6211\u4eec\u4e5f\u78b0\u5230\u8fc7\u76f8\u540c\u7684\u95ee\u9898\u3002\u56e0\u4e3a\u6211\u4eec\u6b63\u5728\u521b\u5efa\u4e00\u4e2a\u97f3\u9ad8\u4e8b\u4ef6\uff0c\u56e0\u6b64\u6211\u4eec\u4f1a\u4ee5\u9891\u7387\u6765\u8003\u8651\u95ee\u9898\u3002\u4f46CombL\u5173\u4e8e\u5ef6\u8fdf\u7684\u5f15\u6570\u662f\u4e00\u4e2a\u6301\u7eed\u65f6\u95f4\u3002\u4e3a\u8fbe\u5230\u4e00\u4e2a\u7279\u5b9a\u7684\u97f3\u9ad8\uff0c\u6bd4\u5982\u8bf4\uff0c200Hz\uff0c\u6211\u4eec\u4e0d\u5f97\u4e0d\u4e3a\u90a3\u4e2a\u97f3\u7684\u6bcf\u6b21\u5faa\u73af\u8f93\u5165\u6301\u7eed\u65f6\u95f4\uff1a\u4e00\u79d2\u76841\/200th\u3002 <\/p>\n
SC\u53ef\u4ee5\u501f\u52a9reciprocal\u65b9\u6cd5<\/em>\u505a\u8fd9\u6837\u7684\u8ba1\u7b97\u3002440.reciprocal<\/em>\u5c06\u8fd4\u56de\u4e00\u4e2a\u9891\u7387\u4e3a440\u7684\u6ce2\u7684\u6bcf\u4e2a\u5468\u671f\u7684\u6301\u7eed\u65f6\u95f4\u30023.5.reciprocal\u5c06\u8fd4\u56de\u4e00\u4e2a\u6301\u7eed3.5\u79d2\u7684\u4e8b\u4ef6\u9891\u7387\u3002\u5982\u679c\u6211\u4eec\u8fd8\u4f7f\u7528midicps\u5c06MIDI\u6570\u5b57\u8f6c\u6362\u4e3a\u9891\u7387\uff0c\u6211\u4eec\u5c06\u63d0\u5347\u8bed\u8a00\u7684\u5c42\u6b21\uff0c\u540c\u65f6\u5411\u6211\u4eec\u7684\u60f3\u6cd5\u66f4\u8fdb\u4e00\u6b65\u3002 <\/p>\n
17.3. midi\u5230cps\u5230\u5ef6\u8fdf\u65f6\u95f4 <\/strong><\/p>\n
\/\/ \u8fd9\u5c06\u8fd4\u56de\u4e00\u4e2a\u6ce2\u6bcf\u6b21\u7684\u5faa\u73af\u5468\u671f \r\n\/\/ \u8fd9\u4e2a\u6ce2\u7684\u9891\u7387\u7684MIDI\u503c\u662f69\uff0c\u6216\u8005A 440 \r\n69.midicps.reciprocal;<\/pre>\n
440.reciprocal; \/\/ \u4e00\u6837\u7684<\/pre>\n
\/\/ \u5c06\u8fd9\u90e8\u5206\u63d2\u5165\u5f26\u4e50 \r\n( \r\n{ \r\n   var burstEnv, att = 0, dec = 0.001; \r\n   var burst, delayTime, delayDecay = 0.5; \r\n   var midiPitch = 69; \/\/ A 440 \r\n   delayTime = midiPitch.midicps.reciprocal; \r\n\/\/ RandSeed.kr(Impulse.kr(1\/delayDecay), 111); \r\n   burstEnv = EnvGen.kr(Env.perc(att, dec), gate: Impulse.kr(1\/delayDecay)); \r\n   burst = PinkNoise.ar(burstEnv); \r\n   CombL.ar(burst, delayTime, delayTime, \r\n      delayDecay, add: burst); \r\n}.play \r\n)<\/pre>\n
\u63d2\u5165postln\u67e5\u770b\u503c\u3002 <\/p>\n
\u4e3a\u4ec0\u4e48\u4e0d\u8bd5\u8bd5\u7528WhiteNoise\u4f5c\u4e3a\u566a\u97f3\u6e90\u5462\uff1f\u8bd5\u8bd5\u5176\u4ed6\u7684\u566a\u97f3\u548c\u6ce2\u5f62\u3002\u518d\u8bd5\u8bd5\u6df7\u5408\u4e00\u5806\u590d\u6742\u7684\u6b63\u5f26\u632f\u8361\u5668\u96c6\u5408\u3002 <\/p>\n
\u7528\u5ef6\u8fdf\u5236\u9020\u590d\u6742<\/h3>\n
\u65e9\u4e9b\u65f6\u5019\uff0c\u6211\u4eec\u770b\u5230\uff0c\u7528\u591a\u901a\u9053\u6269\u5c55\u4ee5\u53caMix<\/em>\u548cdup<\/em>\u53ef\u4ee5\u591a\u4e48\u5feb\u901f\u5730\u5145\u5b9e\u4e00\u4e2a\u7b80\u5355\u7684patch\u3002\u5728\u8fd9\u6837\u7684\u60c5\u51b5\u4e0b\uff0c\u5b83\u4eec\u662f\u5728\u540c\u6837\u7684\u65f6\u95f4\u70b9\u88ab\u590d\u5236\u3002\u5ef6\u8fdf\u5177\u5907\u540c\u6837\u7684\u6548\u679c\u3002\u5b83\u4eec\u590d\u5236\u4e00\u4e2apatch\uff0c\u4f46\u662f\u5faa\u5e8f\u5730\u3002\u6ce8\u610f\u4ee5\u4e0b\u4e24\u4e2a\u4f8b\u5b50\u95f4\u7684\u5fae\u5c0f\u5dee\u5f02\u3002\u7b2c\u4e00\u4e2a\u4f8b\u5b50\u521b\u5efa\u4e86\u4e00\u4e2a\u5355\u72ec\u7684\u8fdb\u7a0b\uff0c\u5e76\u5b9e\u65f6\u590d\u5236\u5b83\u3002\u7b2c\u4e8c\u4e2a\u4f8b\u5b50\u5219\u521b\u5efa\u4e86\u4e94\u4e2a\u72ec\u7acb\u7684\u8fdb\u7a0b\u3002 <\/p>\n
17.4. \u7528\u5ef6\u8fdf\u5236\u9020\u590d\u6742<\/strong> <\/p>\n
( \r\n{ \r\nt = Impulse.kr(5); \r\no = SinOsc.ar(TRand.kr(2000, 4000, t), mul: EnvGen.kr(Env.perc(0.001, 0.1), \r\nt))*0.1; \r\nMix.ar(Pan2.ar( \r\n   CombL.ar(o, 2.0, \r\n      Array.fill(5, {rrand(0.2, 1.9)}) \r\n   ), \r\n   Array.fill(5, {1.0.rand2}) \r\n)); \r\n}.play \r\n)<\/pre>\n
\u4e0e\u4e4b\u6bd4\u8f83 <\/p>\n
( \r\n{ \r\nt = Impulse.kr(Array.fill(5, {rrand(4.0, 7.0)})); \r\n\r\nMix.ar(Pan2.ar( \r\nSinOsc.ar(TRand.kr(2000, 4000, t), mul: EnvGen.kr(Env.perc(0.001, 0.1), t))*0.1, \r\n   Array.fill(5, {1.0.rand2}) \r\n)); \r\n}.play \r\n)<\/pre>\n
\u5408\u6210\u5668\u5b9a\u4e49<\/h3>\n
\u5728post\u7a97\u53e3\u5185\uff0c\u4f60\u53ef\u80fd\u5df2\u7ecf\u6ce8\u610f\u5230\u4e00\u4e9b\u7c7b\u4f3c\u4e0b\u8fb9\u8fd9\u6837\u7684\u53cd\u9988\uff1a
\nSynth(\"-429504755\" : 1008)
\nSynth(\"-1768726205\" : 1009)
\nSynth(\"-2052671376\" : 1010)
\nSynth(\"-713843897\" : 1011)
\nSynth(\"2119841241\" : 1012) <\/code><\/p>\n
\u5f15\u53f7\u5185\u7684\u6570\u5b57\u662f\u5408\u6210\u5668\u5b9a\u4e49\u7684\u540d\u5b57\uff0c\u5192\u53f7\u540e\u7684\u662f\u8282\u70b9\u6570\u3002\u5b83\u4eec\u5728\u6bcf\u4e2apatch\u8fd0\u884c\u662f\u81ea\u52a8\u751f\u6210\u3002\u76ee\u524d\u4e3a\u6b62\uff0c\u6211\u4eec\u4f7f\u7528\u4e86\u4e00\u4e2a\u5411\u540e\u517c\u5bb9\uff08\u5bf9\u4e8eSC2\u7528\u6237\uff09\u7684\u6377\u5f84\uff0c\u5141\u8bb8SC\u5728\u6bcf\u6b21\u8fd0\u884c\u9009\u5b9a\u4ee3\u7801\u65f6\u521b\u5efa\u4e00\u4e2a\u4e13\u5236\u7684\uff08arbitrary\uff09\u5408\u6210\u5668\u5b9a\u4e49\u3002\u5373\u4f7f\u4f60\u8fd0\u884c\u76f8\u540c\u7684\u4ee3\u7801\u4e24\u6b21\uff0c\u5b83\u4ecd\u4f1a\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u5408\u6210\u5668\uff0c\u5f53\u7136\uff0c\u8fd9\u662f\u4f4e\u6548\u7684\u3002\u5982\u679c\u80fd\u91cd\u64ad\u4e00\u4e2a\u5df2\u5b58\u5728\u7684\u5b9a\u4e49\u5c06\u4f1a\u66f4\u597d\u3002\u8bd5\u7740\u8fd0\u884c\u4ee5\u4e0b\u51e0\u884c\u4ee3\u7801\uff0c\u7528\u4f60\u5728post\u7a97\u53e3\u770b\u5230\u7684\u6570\u5b57\u66ff\u4ee3\u4e0b\u4f8b\u4e2d\u7684\u6570\u5b57\uff08\u4f60\u53ef\u4ee5\u4f7f\u7528\u590d\u5236-\u7c98\u8d34\uff0c\u6216\u8005\u79fb\u53bb\u5192\u53f7\u548c\u8282\u70b9\u6570\uff0c\u7136\u540e\u8fd0\u884cpost\u7a97\u53e3\u5185\u7684\u9648\u8ff0\uff09\u3002 <\/p>\n
17.5. \u64ad\u653e\u4e00\u4e2asynthDef <\/strong><\/p>\n
\/\/\u9996\u5148 \r\n{SinOsc.ar(rrand(700, 1400), mul: 0.1)}.play\r\n\r\n\/\/\u4f60\u5c06\u4f1a\u5728post\u7a97\u53e3\u770b\u5230\u7c7b\u4f3c\u4e0b\u8fb9\u8fd9\u6837\u7684\u4e1c\u897f \r\n\/\/Synth(\"1967540257\" : 1012) \r\n\r\n\/\/\u7136\u540e, \u7528\u4f60\u5728post\u7a97\u53e3\u5185\u770b\u5230\u7684\u6570\u5b57\u66ff\u4ee31967540257 \r\nSynth(\"1967540257\");<\/pre>\n
\u4e4b\u524d\u6211\u4eec\u4e00\u76f4\u4f7f\u7528cmd+. \u6765\u505c\u6b62\u6bcf\u4e2apatch\uff0c\u8fd9\u4f1a\u505c\u6b62\u5168\u90e8\u8fdb\u7a0b\u3002\u5982\u679c\u4e00\u4e2a\u5408\u6210\u5668\u88ab\u5206\u914d\u5230\u4e00\u4e2a\u53d8\u91cf\uff0c\u4f60\u53ef\u4ee5\u7528free\u65b9\u6cd5\u7cbe\u786e\u5730\u505c\u6b62\u5b83\u3002\u5355\u72ec\u8fd0\u884c\u4e0b\u8fb9\u4e24\u884c\uff1b\u540c\u6837\u7684\uff0c\u7528\u4f60\u5728post\u7a97\u53e3\u5185\u770b\u5230\u7684\u6570\u5b57\u66ff\u4ee31967540257\u3002 <\/p>\n
17.6. \u505c\u6b62\u4e00\u4e2asynthDef <\/strong><\/p>\n
a = Synth(\"1967540257\"); \r\n\r\na.free;<\/pre>\n
\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u5c06\u539f\u59cbpatch\u5206\u914d\u7ed9\u4e00\u4e2a\u53d8\u91cf\u6765\u5ffd\u7565\u6389\u5bfb\u627e\u5176\u540d\u5b57\u7684\u8fc7\u7a0b\u3002\u6211\u4eec\u540c\u6837\u53ef\u4ee5\u8fd0\u884c\u591a\u4e2a\u4f8b\u5b50\uff0c\u7136\u540e\u5355\u72ec\u6216\u5168\u90e8\u505c\u6b62\u5b83\u4eec\u3002 <\/p>\n
17.7. \u8fd0\u884c\u4e00\u4e2asynthDef<\/strong> <\/p>\n
\/\/\u968f\u610f\u8fd0\u884c\u4e00\u4e2a\u6216\u51e0\u4e2a\u6216\u5168\u90e8 \r\na = {SinOsc.ar(rrand(700, 1400), mul: 0.1)}.play \r\nb = {SinOsc.ar(rrand(700, 1400), mul: 0.1)}.play \r\nc = {SinOsc.ar(rrand(700, 1400), mul: 0.1)}.play \r\nd = {SinOsc.ar(rrand(700, 1400), mul: 0.1)}.play \r\n\r\n\/\/\u505c\u6b62\u4e00\u4e9b \r\na.free; b.free; \r\n\/\/\u6216\u5168\u90e8\u505c\u6b62 \r\nc.free; \r\nd.free<\/pre>\n
SynthDef\u5bf9\u8c61\u5141\u8bb8\u4f60\u4e3a\u4e00\u4e2apatch\u547d\u540d\u5e76\u6dfb\u52a0\u5f15\u6570\u3002\u4e00\u4e2a\u5f15\u6570\u7c7b\u4f3c\u4e00\u4e2a\u53d8\u91cf\u5e76\u88ab\u7528\u4e8e\u5411\u51fd\u6570\u4f20\u9012\u503c\u3002\u4f60\u53ef\u4ee5\u5728\u7b2c\u4e00\u6b21\u521b\u5efa\u5408\u6210\u5668\u6216\u8005\u5728\u5b83\u8fd0\u884c\u540e\u8bbe\u7f6e\u5f15\u6570\u3002\u4e0b\u8fb9\u7b2c\u4e00\u4e2a\u4f8b\u5b50\u662f\u4e4b\u524d\u6211\u4eec\u60ef\u7528\u7684\u5199\u6cd5\u3002\u53e6\u4e00\u4e2a\u4f8b\u5b50\u7528\u5408\u6210\u5668\u5b9a\u4e49\u6765\u5199\uff0c\u5e76\u4f7f\u7528\u4e86\u540d\u5b57\u548c\u5f15\u6570\u3002 <\/p>\n
17.8. SynthDef <\/strong><\/p>\n
(\/\/\u521d\u59cbpatch \r\n{ \r\nvar rate = 12, att = 0, decay = 5.0, offset = 400; \r\nvar env, out, pan; \r\npan = LFNoise1.kr(1\/3); \r\nenv = EnvGen.kr(Env.perc(att, decay)); \r\nout = Pan2.ar( \r\n         Blip.ar(LFNoise0.ar(rate, min(100, offset), offset), \r\n            (env)*12 + 1, 0.3), \r\n         pan)*env; \r\nout \r\n}.play \r\n)<\/pre>\n
\/\/SynthDef (\u547d\u540d\u5b83)\u548c\u5f15\u6570 \r\n( \r\nSynthDef(\"SH\", \r\n{ \r\narg rate = 12, att = 0, decay = 5.0, offset = 400; \r\nvar env, out, pan; \r\npan = LFNoise1.kr(1\/3); \r\nenv = EnvGen.kr(Env.perc(att, decay), doneAction: 2); \r\nout = Pan2.ar( \r\n         Blip.ar(LFNoise0.ar(rate, min(100, offset), offset), \r\n            (env)*12 + 1, 0.3), \r\n         pan)*env; \r\nOut.ar(0, out) \r\n}).play \r\n)<\/pre>\n
\u89c2\u5bdfpost\u7a97\u53e3\uff0c\u4f60\u5c06\u770b\u5230\u7b2c\u4e00\u4f8b\u7684\u90a3\u4e32\u957f\u6570\u5b57\u73b0\u5728\u5df2\u88ab\u540d\u5b57\u201cSH\u201d\u6240\u66ff\u4ee3\u3002 <\/p>\n
\u4f7f\u7528SynthDef\u540e\uff0c\u4e00\u4e9b\u4e4b\u524d\u81ea\u52a8\u5b8c\u6210\u7684\u4e1c\u897f\u5728\u8fd9\u91cc\u9700\u8981\u660e\u786e\u4e00\u4e0b\u3002\u9996\u5148\u662f\u4f7f\u7528Out.ar<\/em>\u5206\u914d\u4e00\u4e2a\u8f93\u51fa\u6bcd\u7ebf\uff08bus\uff0c\u4ee5\u540e\u8bf4\u660e\uff09\u3002\u53e6\u5916\u4e00\u70b9\u662f\u5f53\u4e00\u4e2apatch\u5b8c\u6210\u6f14\u594f\u540e\u505c\u6b62\u5b83\u3002\u6211\u4eec\u4f7f\u7528\u5305\u7edc\u751f\u6210\u4e8b\u4ef6\uff0c\u4f46\u4f60\u53ef\u80fd\u5df2\u6ce8\u610f\u5230CPU\u548cUGen\u4eec\u4ecd\u662f\u4e00\u6837\u7684\u3002\u90a3\u662f\u56e0\u4e3a\u5373\u4f7f\u5305\u7edc\u7ec8\u6b62\u4e86\u6211\u4eec\u542c\u5230\u7684\u58f0\u97f3\uff0c\u4f46patch\u5374\u4ecd\u5728\u8fd0\u884c\u3002\u5f53\u5305\u7edc\u7ec8\u6b62\u540e\uff0c\u6709\u51e0\u53ef\u80fd\u6027\u3002\u9ed8\u8ba4\u662f\u4ec0\u4e48\u4e5f\u4e0d\u505a\u3002\u628a\u5b83\u6539\u4e3adoneAction: 2<\/em>\u5c06\u544a\u8bc9\u670d\u52a1\u5668\u91ca\u653e\u5df2\u5b8c\u6210UGen\u7684\u8fdb\u7a0b\u5360\u7528\u3002\uff08\u8981\u770b\u5176\u91cd\u8981\u6027\uff0c\u8bd5\u7740\u5728\u8fd0\u884c\u4e0b\u4f8b\u524d\u6ce8\u91ca\u6389\u8fd9\u4e00\u884c\u3002\u89c2\u5bdf\u670d\u52a1\u5668CPU\u5360\u7528\u7684\u589e\u52a0\u4ee5\u53ca\u6700\u540e\u7684\u5d29\u6e83\u3002\uff09 <\/p>\n
\u73b0\u5728\uff0c\u4ee3\u7801\u5df2\u7ecf\u88ab\u8f7d\u5165\u670d\u52a1\u5668\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528set\u63a7\u5236\u503c\u8fd0\u884c\u82e5\u5e72\u4e2a\u4e50\u5668\u7684\u62f7\u8d1d\u3002\u5f15\u6570\u88ab\u7f6e\u5165\u4e00\u4e2a\u6570\u7ec4\u5e76\u4ee5\u659c\u6760\u5f00\u59cb\uff0c\u503c\uff1a[\\rate, 10, \\offset, 200]<\/em>\u3002\u9010\u6b21\u8fd0\u884c\u4e00\u4e0b\u8bf8\u884c\u3002\uff08\u5728SC\u4e2d\uff0c\u8fd9\u5f88\u65b9\u4fbf\uff0c\u56e0\u4e3a\u4f60\u8fd0\u884c\u5b8c\u4e00\u884c\u4ee3\u7801\u540e\uff0c\u6e38\u6807\u5c06\u8df3\u52a8\u5230\u4e0b\u4e00\u884c\uff0c\u56e0\u6b64\uff0c\u4f60\u4ec5\u9700\u4e00\u76f4\u6309enter\u5373\u53ef\u3002\uff09 <\/p>\n
17.9. SH\u7684\u591a\u8282\u70b9\uff08node\uff09<\/strong> <\/p>\n
\/\/\u5177\u5907\u4e0d\u540c\u5f15\u6570\u7684\u4e09\u4e2a\"SH\"\u72ec\u7acb\u8282\u70b9 \r\n\/\/\u9010\u4e00\u8fd0\u884c\u4ee5\u4e0b\u4e09\u884c\u7136\u540e\u505c\u6b62 \r\na = Synth(\"SH\", [\\rate, 10, \\offset, 200]); \r\nb = Synth(\"SH\", [\\offset, 400, \\att, 3.0, \\decay, 0]); \r\nc = Synth(\"SH\", [\\rate, 30, \\offset, 2000]); \r\n\r\n\/\/\u8ba9\u5b83\u4eec\u81ea\u5df1\u6d88\u5931\u6216\u7528\u4ee5\u4e0b\u8bf8\u884c\u505c\u6b62\u5b83\u4eec. \r\na.free; \r\nb.free; \r\nc.free;<\/pre>\n
\/\/\u6539\u53d8\u4e00\u4e2a\u5df2\u5b58\u5728\u8282\u70b9\u7684\u53c2\u6570. \u9010\u4e00\u8fd0\u884c\u4e00\u4e0b\u8bf8\u884c. \r\na = Synth(\"SH\", [\\rate, 23, \\offset, 30, \\decay, 20]); \r\na.set(\\offset, 1000) \r\na.set(\\offset, 300) \r\na.set(\\offset, 800) \r\n\r\na.free;<\/pre>\n
\/\/\u5177\u5907\u5f15\u6570\u7684\u4e24\u4e2a\u8282\u70b9 \r\na = Synth(\"SH\", [\\rate, 7, \\offset, 200, \\decay, 20]); \r\nb = Synth(\"SH\", [\\rate, 23, \\offset, 1200, \\decay, 20]); \r\n\r\na.set(\\offset, 40) \r\nb.set(\\offset, 1000) \r\na.set(\\offset, 800) \r\nb.set(\\offset, 600) \r\na.set(\\offset, 1200) \r\nb.set(\\offset, 50) \r\n\r\na.free; b.free<\/pre>\n
\u4f60\u540c\u6837\u53ef\u4ee5\u4f7f\u7528\u5f15\u6570\u6570\u5b57\u8ddf\u7740\u503c\uff0c\u6216\u5b57\u7b26\u4e32\u8ddf\u7740\u503c\u7684\u65b9\u5f0f\u8bbe\u7f6e\u5f15\u6570\uff0c\u5c31\u50cf\u4e0b\u8fb9\u8fd9\u6837\u3002 <\/p>\n
17.10. \u4f20\u9012\u5f15\u6570\u7684\u8bed\u6cd5 <\/p>\n
\/\/\u6bcf\u884c\u4ee3\u8868\u7684\u90fd\u662f\u540c\u6837\u7684\u4e1c\u897f \r\na = Synth(\"SH\", [\\rate, 10, \\offset, 200]); \r\na = Synth(\"SH\", [0, 10, 3, 200]); \r\na = Synth(\"SH\", [\"rate\", 10, \"offset\", 200]);<\/pre>\n
\u6700\u540e\uff0c\u4f60\u53ef\u4ee5\u6307\u51fa\u4e00\u4e2a\u5728\u63a7\u5236\u4e0e\u6539\u53d8\u95f4\u7684\u65f6\u6ede\uff0c\u4ee5\u6b64\u83b7\u5f97\u4e00\u4e2a\u5e73\u6ed1\u7684\u8fc7\u6e21\u3002 <\/p>\n
17.11. \u63a7\u5236\u6539\u53d8\u95f4\u7684\u8fc7\u6e21\u65f6\u95f4<\/strong> <\/p>\n
\/\/SynthDef, \u5f15\u6570, \u8fc7\u6e21 \r\n( \r\nSynthDef(\"SH\", \r\n{ \r\narg rate = 12, att = 0, decay = 5.0, offset = 400; \r\nvar env, out, pan; \r\npan = LFNoise1.kr(1\/3); \r\nenv = EnvGen.kr(Env.perc(att, decay), doneAction: 2); \r\nout = Pan2.ar( \r\n         Blip.ar(LFNoise0.ar(rate, min(100, offset), offset), \r\n            (env)*12 + 1, 0.3), \r\n         pan)*env; \r\nOut.ar(0, out) \r\n}, \r\n[0.5, 0.1, 0, 4] \/\/\u4e3a\u4ee5\u4e0a\u6bcf\u4e2a\u5f15\u6570\u8fc7\u6e21 \r\n).play \r\n) \r\n\r\na = Synth(\"SH\", [\\rate, 6, \\decay, 20, \\offset, 200]); \r\na.set(\\rate, 18); \r\na.set(\\offset, 1000);<\/pre>\n
\u6211\u4eec\u53ef\u80fd\u53ef\u4ee5\u6539\u53d8\u521d\u59cbpatch\u7684\u53c2\u6570\u5e76\u518d\u6b21\u8fd0\u884c\u5b83\u3002\u4f46\u90a3\u4e0d\u591f\u7075\u6d3b\u3002\u73b0\u5728\u4f7f\u7528SynthDef\u4e0e\u5f15\u6570\uff0c\u5141\u8bb8\u6211\u4eec\u7528\u4e0d\u540c\u7684\u63a7\u5236\u503c\u6765\u81ea\u52a8\u521b\u5efa\u4e50\u5668\u7684\u526f\u672c\u3002 <\/p>\n
\u73b0\u5728\uff0c\u5728\u6211\u4eec\u7684\u670d\u52a1\u5668\u4e2d\uff0c\u5df2\u7ecf\u8f7d\u5165\u4e86\u4e00\u4e2a\u5408\u6210\u5668\u5b9a\u4e49\uff0c\u6211\u4eec\u53ef\u4ee5\u5efa\u7acb\u5728\u4f5c\u66f2\u8fdb\u7a0b\u7684\u57fa\u7840\u4e0a\u53d1\u9001\u4e00\u7cfb\u5217\u7684\u201cplay\u201d\u547d\u4ee4\u3002\u4e3a\u4e86\u91cd\u590d\u8fd9\u4e9b\u547d\u4ee4\uff0c\u6211\u4eec\u5c06\u4f7f\u7528\u4e00\u4e2a\u5faa\u73af\u3002 <\/p>\n
\u65b9\u6cd5loop<\/em>\u5faa\u73af\u4e00\u4e2a\u51fd\u6570\u3002Task\u5141\u8bb8\u4f60\u6682\u505c\u5faa\u73af\uff08\u4e0d\u8981\u5c1d\u8bd5\u4e00\u4e2a\u6ca1\u6709\u6682\u505c\u7684\u5faa\u73af\uff0c\u6216\u8005\u81f3\u5c11\u5728\u4f60\u8fd9\u4e48\u505a\u4e4b\u524d\u4fdd\u5b58\u4f60\u7684\u5de5\u4f5c\u3002\uff09\u3002\u6bcf\u6b21\u5faa\u73af\uff0c\u4e00\u4e2a\u65b0\u7684SH\u90fd\u88ab\u7528\u4e00\u4e2a\u968f\u673a\u7684\u503c\u4f5c\u4e3a\u5f15\u6570\uff08\u6216\u63a7\u5236\uff09\u6240\u521b\u5efa\u3002 <\/p>\n
17.12. SH\u7684\u591a\u8282\u70b9<\/strong><\/p>\n
( \r\nr = Task({ \r\n   { \r\n      Synth(\"SH\", [ \r\n      \\rate, exprand(3.0, 22.0), \r\n      \\decay, rrand(0.5, 15.0), \r\n      \\att, [0, rrand(0, 3.0)].choose, \r\n      \\offset, rrand(100, 2000)]); \r\n      rrand(1.0, 5.0).wait; \/\/\u6bcf\u4e24\u6b21\u91cd\u590d\u95f4\u7684\u7b49\u5f85\u65f6\u95f4 \r\n   }.loop; \/\/\u91cd\u590d\u8fd9\u4e2a\u51fd\u6570 \r\n}).play \r\n) \r\n\r\nr.stop;<\/pre>\n
\u8bd5\u7740\u6539\u53d8\u672c\u4f8b\u5185\u7684\u4efb\u610f\u503c\u3002\u540c\u6837\u8bd5\u8bd5\u63d2\u5165postln\u76d1\u89c6\u90a3\u4e9b\u503c\uff08\u6bd4\u65b9\u8bf4\uff0crrand(1.0, 5.0).wait.postln<\/em>\uff09\u3002 <\/p>\n
\u6700\u540e\uff0c\u4e00\u65e6\u4f60\u5c06\u4f60\u7684\u4e50\u5668\u8c03\u6559\u5230\u503c\u5f97\u4fdd\u5b58\u7684\u5730\u6b65\uff0c\u4f60\u53ef\u4ee5\u5c06\u5b83\u5199\u5165\u4f60\u7684\u786c\u76d8\uff08SC\u6587\u4ef6\u5939\u5185\u7684synthdefs\u6587\u4ef6\u5939\uff09\u3002\u4e0b\u6b21\u8fd0\u884cSC\uff0c\u4f60\u5c06\u80fd\u591f\u901a\u8fc7\u540d\u5b57\u8fd0\u884c\u8fd9\u4e2a\u5408\u6210\u5668\uff08\u5c06\u4e4b\u9001\u5165\u6b63\u786e\u7684\u670d\u52a1\u5668\u662f\u91cd\u8981\u7684\uff0c\u65e0\u8bba\u54ea\u4e2a\u6b63\u5728\u8fd0\u884c\u3002\u5982\u679c\u4f60\u70b9\u51fb\u6b63\u5728\u8fd0\u884c\u7684\u670d\u52a1\u5668\u4e0a\u8fb9\u7684default\u6309\u94ae\uff0c\u5b83\u5c06\u53bb\u5230\u90a3\u4e2a\u670d\u52a1\u5668\u3002\u6216\u8005\u4f60\u53ef\u4ee5\u4f7f\u7528\u76ee\u6807\u5f15\u6570\u5c06\u4e4b\u9001\u7ed9\u4e00\u4e2a\u6216\u53e6\u4e00\u4e2a\u3002\u6211\u5728\u4e0b\u4f8b\u4e2d\u5305\u542b\u4e86boot\u8868\u8fbe\u5f0f\u4ee5\u8bf4\u660e\u4e0a\u8fb9\u8bf4\u7684\u7b2c\u4e8c\u79cd\u65b9\u6cd5\uff09\u3002 <\/p>\n
17.13. SH\u7684\u591a\u8282\u70b9<\/strong> <\/p>\n
(\/\/\u50a8\u5b58\u6587\u4ef6\u5e76\u5728\u670d\u52a1\u5668\"s\"\u5185\u8f7d\u5165 \r\nSynthDef(\"SH\", \r\n{ \r\narg rate = 12, att = 0, decay = 5.0, offset = 400; \r\nvar env, out, pan; \r\npan = LFNoise1.kr(1\/3); \r\nenv = EnvGen.kr(Env.perc(att, decay), doneAction: 2); \r\nout = Pan2.ar( \r\n         Blip.ar(LFNoise0.ar(rate, min(100, offset), offset), \r\n            (env)*12 + 1, 0.3), \r\n         pan)*env; \r\nOut.ar(0, out) \r\n}).load(s) \r\n) \r\n\r\n\/\/\u73b0\u5728\u9000\u51faSC, \u5728synthdefs\u6587\u4ef6\u5939\u5185\u67e5\u627e\"SH.scsyndef\" \r\n\/\/\u8fd0\u884cSC\u5e76\u8fd0\u884c\u4ee5\u4e0b\u4e24\u884c \r\ns = Server.internal; s.boot; \r\na = Synth(\"SH\", [\\rate, 10, \\offset, 200], target: s);<\/pre>\n
\u5f53\u4f60\u7f16\u8bd1\u4e86\u4e00\u4e2a\u725b\u903c\u7684\u4e50\u5668\u5e93\uff0c\u7c7b\u4f3cKSpluck\uff0c\u4f60\u6709\u53ef\u80fd\u5fd8\u8bb0\u5b83\u4eec\u6709\u4ec0\u4e48\u63a7\u5236\u6bcd\u7ebf\uff0c\u8f93\u51fa\u6bcd\u7ebf\u4ee5\u53ca\u5f15\u6570\u3002\u4f60\u53ef\u4ee5\u7528\u4e0b\u5217\u4ee3\u7801\u67e5\u627e\u6240\u6709\u4fe1\u606f\u3002 <\/p>\n
17.14. SynthDef\u6d4f\u89c8\u5668<\/strong> <\/p>\n
( \r\nSynthDescLib.global.read; \r\nSynthDescLib.global.browse; \r\n)<\/pre>\n
\u4e0b\u8fb9\u662f\u4e00\u4e2aSynthDef\u91cc\u7684KSpluck\uff0c\u7136\u540e\u662f\u4e00\u4e2a\u5faa\u73af\u4f8b\u7a0b\uff08routine\uff09\u3002 <\/p>\n
17.15. KSpluck SynthDef (EnvGen, Env, perc, PinkNoise, CombL, choose) <\/strong><\/p>\n
( \r\n\/\/\u9996\u5148\u8f7d\u5165\u5408\u6210\u5668\u5e76\u5b58\u76d8 \r\nSynthDef(\"KSpluck\", \r\n   { \r\n      arg midiPitch = 69, delayDecay = 1.0; \r\n      var burstEnv, att = 0, dec = 0.001; \r\n      var signalOut, delayTime; \r\n      delayTime = [midiPitch, midiPitch + 12].midicps.reciprocal; \r\n      burstEnv = EnvGen.kr(Env.perc(att, dec)); \r\n      signalOut = PinkNoise.ar(burstEnv); \r\n      signalOut = CombL.ar(signalOut, delayTime, delayTime, \r\n         delayDecay, add: signalOut); \r\n      DetectSilence.ar(signalOut, doneAction:2); \r\n      Out.ar(0, signalOut) \r\n   } \r\n).play; \r\n) \r\n\r\n( \r\n\/\/\u7136\u540e\u8fd0\u884c\u8fd9\u4e2a\u56de\u653e\u4efb\u52a1 \r\nr = Task({ \r\n   {Synth(\"KSpluck\", \r\n      [ \r\n      \\midiPitch, rrand(30, 90), \/\/\u9009\u62e9\u4e00\u4e2a\u97f3\u9ad8 \r\n      \\delayDecay, rrand(0.1, 1.0) \/\/\u9009\u62e9\u6301\u7eed\u65f6\u95f4 \r\n      ]); \r\n      \/\/\u5728\u4e0b\u4e00\u4e2a\u4e8b\u4ef6\u524d\u9009\u62e9\u4e00\u4e2a\u7b49\u5f85\u65f6\u95f4 \r\n      [0.125, 0.125, 0.25].choose.wait; \r\n   }.loop; \r\n}).play(SystemClock) \r\n) \r\n\r\n\/\/\u505c\u6b62\u4e4b \r\nr.stop;<\/pre>\n
\u53f3\u901a\u9053\u5728\u516b\u5ea6\u4e0a\u7ffb\u500d\uff08MIDI\uff0c+12\uff09\u3002\u8bd5\u7740\u52a0\u5165\u4e00\u4e2a\u5f15\u6570\uff0c\u4ee5\u5141\u8bb8\u4f60\u7ffb\u500d\u5176\u4ed6\u7684\u97f3\u7a0b\uff08\u4e94\u5206\u4e4b\u4e00\uff0c\u56db\u5206\u4e4b\u4e00\uff0c\u4e09\u5206\u4e4b\u4e00\uff0c\u7b49\u7b49\uff09\u3002\u6539\u53d8\u7b49\u5f85\u65f6\u95f4\u7684\u9009\u62e9\u3002\u4e3a\u4ec0\u4e48\u5728\u672c\u4f8b\u4e2d\u6211\u8981\u4f7f\u75280.125\u548c0.25\uff1f\u589e\u52a0postln\u4ee5\u68c0\u67e5\u53d8\u91cf\u3002\u52a0\u5165\u4e00\u4e2a\u94fe\u63a5MIDI\u97f3\u9ad8\u4e0e\u8870\u51cf\u65f6\u95f4\u7684\u9648\u8ff0\uff0c\u4f7f\u5f97\u9ad8\u97f3\u7b26\u77ed\u8870\u51cf\uff0c\u4f4e\u97f3\u7b26\u957f\u8870\u51cf\u3002 <\/p>\n
\u4ed4\u7ec6\u8046\u542c\u6bcf\u4e2a\u97f3\u7684\u7279\u5f81\u53ca\u6bcf\u4e00\u4e2aattack\u3002\u8fd9\u660e\u6446\u7740\u662f\u540c\u4e00\u4ef6\u4e50\u5668\uff0c\u7136\u800c\u6bcf\u4e2a\u97f3\u7b26\u4ecd\u7136\u6709\u8f7b\u5fae\u4e0d\u540c\u7684\u97f3\u8272\u3002\u7279\u70b9\u6539\u53d8\u4e86\u662f\u7531\u4e8e\u6bcf\u6b21\u9020\u6210pluck\u7684\u566a\u97f3\u66b4\u53d1\u90fd\u662f\u65b0\u7684\uff0c\u5b83\u4f1a\u6709\u4e0d\u540c\u7684\u6ce2\u5f62\u3002\u4f20\u7edf\u5408\u6210\u5668\u9884\u7f6e\u7f3a\u4e4f\u8fd9\u6837\u7684\u590d\u6742\u6027\uff0c\u8fd9\u662f\u81ea\u7136\u4e50\u5668\u56fa\u6709\u7684\u3002<\/p>\n
\u7ec3\u4e60\uff1aKarplus-Strong Patch<\/h3>\n
\u5728K-S patch\u4e2d\uff0cmidiPitch\u7684\u5f15\u6570\u7531\u4e00\u4e2a\u201c\u5408\u6cd5\u201d\u97f3\u8c03\u9009\u62e9\u7684\u6570\u7ec4\u8bbe\u7f6e\u3002\u7136\u540e\u5b83\u88ab\u6dfb\u52a0\u5230\u4e00\u4e2a\u516b\u5ea6\u9009\u62e9\u7684\u6570\u7ec4\u4e2d\u3002\u53d8\u91cfart<\/em>\uff08\u7ed3\u5408\uff09\u53d6\u4ee3\u4e86delayDecay<\/em>\uff0c\u56e0\u4e3a\u5b83\u88ab\u7528\u4e8e\u7f29\u77ed\u6216\u52a0\u957f\u6bcf\u4e2a\u97f3\u5934\u957f\u5ea6\u3002\u6ce8\u610f\u7a81\u53d1\u5305\u7edc\u4e3aour<\/em>\u63d0\u4f9b\u4e00\u4e2a\u7acb\u4f53\u58f0\uff08\u6570\u7ec4\uff09\u4fe1\u53f7\u3002\u5373\u4f7f\u4f60\u542c\u5230\u4e00\u4e2a\u97f3\uff0c\u5de6\u3001\u53f3\u58f0\u9053\u5e94\u5f53\u7a0d\u6709\u4e0d\u540c\u3002delayTime<\/em>\u540c\u6837\u7528\u4e00\u4e2a\u7acb\u4f53\u58f0\u6570\u7ec4\u8bbe\u7f6e\uff1a\u53f3\u58f0\u9053\u9ad8\u516b\u5ea6\uff08MIDI\u6570\u5b57\uff09\u3002\u6574\u4e2apatch\u901a\u8fc7\u7528LFNoise1<\/em>\u63a7\u5236\u6ee4\u6ce2\u66f2\u7ebf\u7684RLPE<\/em>\u4f20\u9012\u3002\u6570\u7ec4wait\u4e3a\u504f\u5dee\u9009\u62e9\u4f7f\u7528\u4e86\u4e00\u4e2a\u5feb\u901f\u7684\u65b9\u6cd5\uff1a\u8f7d\u5165\u9ab0\u5b50\u3002\u56e0\u4e3a\u6709\u4e94\u4e2a0.125\u548c\u4e00\u4e2a1\u7684\u5b9e\u4f8b\uff0c\u56e0\u6b640.125\u88ab\u9009\u4e2d\u7684\u673a\u7387\u670986%\u3002<\/p>\n
\u5c1d\u8bd5\u6539\u53d8midiPitch\u6570\u7ec4<\/em>\u5230\u591a\u6837\u7684\u97f3\u9636\u4e0a\uff1a\u5168\u97f3\u9636\uff0c\u81ea\u7136\u97f3\u9636\uff0c\u534a\u97f3\u9636\uff0c\u516b\u97f3\u97f3\u9636\uff0c\u56db\u5206\u4e4b\u4e00\u97f3\u9636\u7b49\u7b49\u3002\u5c1d\u8bd5\u4e3apatch\u7684\u5176\u4ed6\u65b9\u9762\u589e\u52a0\u7acb\u4f53\u58f0\u6570\u7ec4\uff0c\u6bd4\u5982\uff0cLFNoise<\/em>\u7387\u6216\u6ee4\u6ce2\u622a\u6b62\u3002<\/p>\n
17.16. \u7ec3\u4e60: K-S \u62c9\u626f (EnvGen, PinkNoise, LFNoise1, Out, DetectSilence)<\/strong><\/p>\n
\/\/\u8f7d\u5165\u8fd9\u4e2a\u5b9a\u4e49\r\n(\r\nSynthDef.new(\"KSpluck3\",\r\n   { \/\/Ugen\u51fd\u6570\u5f00\u59cb\r\n   arg midiPitch, art;\r\n   var burstEnv, att = 0, dec = 0.01, legalPitches; \/\/\u7533\u660e\u53d8\u91cf\r\n   var out, delayTime;\r\n   delayTime = [midiPitch, midiPitch + 12].midicps.reciprocal;\r\n   burstEnv = EnvGen.kr(Env.perc(att, dec));\r\n   out = PinkNoise.ar([burstEnv, burstEnv]); \/\/Noise burst\r\n   out = CombL.ar(out, delayTime, delayTime,\r\n      art, add: out); \/\/Echo chamber\r\n   out = RLPF.ar(out, LFNoise1.kr(2, 2000, 2100), 0.1); \/\/Filter\r\n   DetectSilence.ar(out, doneAction:2);\r\n   Out.ar(0, out*0.8)\r\n   }\r\n).play;\r\n)\r\n\r\n\/\/\u7136\u540e\u8fd0\u884c\u8fd9\u4e2a\u4f8b\u7a0b\r\n(\r\nr = Task({\r\n   {Synth(\"KSpluck3\",\r\n   [\r\n   \\midiPitch, [0, 2, 4, 6, 8, 10].choose + [24, 36, 48, 60].choose,\r\n   \\art, [0.125, 0.25, 0.5, 1.0, 2.0].choose\r\n   ]);\r\n   \/\/\u9009\u62e9\u4e00\u4e2a\u95f4\u9694\u65f6\u95f4\r\n   [0.125, 0.125, 0.125, 0.125, 0.125, 1].choose.wait;\r\n   }.loop;\r\n}).play(SystemClock)\r\n)<\/pre>\n","protected":false},"excerpt":{"rendered":"
\u7c7b\u4f3c\u949f\u9e23\u548cKlank\uff0cKarplus\/Strong \u201c\u626f\u201d\u4e5f\u662f\u7531\u566a\u97f3\u5f00\u59cb\u7684\u7269\u7406\u6a21\u578b\u3002\u5b83\u6a21\u4eff\u4e00\u6839\u88ab\u62c9\u626f\u7684\u5f26\uff0c\u7531\u624b\u6307\u6216\u5339\u514b\u7684\u62e8\u52a8\u89e6\u53d1\uff0c\u590d\u5236\u4e86\u5728\u4e24\u7aef\u6447\u6446\u7684\u4e8b\u4ef6\u3002 \u5728\u8f83\u65e9\u7684\u7ae0\u8282\uff0c\u6211\u4eec\u901a\u8fc7\u590d\u5236\u4e00\u4e2a\u5343\u5206\u4e4b\u4e00\u79d2\u7684\u91c7\u6837\u5e76\u5c06\u5b83\u4e0d\u65ad\u7c98\u8d34\u5165\u4e00\u4e2a\u65b0\u7684\u6587\u4ef6\u6765\u4ece\u566a\u97f3\u4e2d\u521b\u9020\u4e00\u4e2a\u5468\u671f\u6ce2\u3002Karplus\/Strong\u4f7f\u7528\u4e00\u4e2a\u5ef6\u8fdfUGen\u8fbe\u5230\u4e86\u540c\u6837\u7684\u6548\u679c\u3002\u4e00\u4e2a\u566a\u97f3\u7684\u7206\u53d1\u88ab\u91ca\u653e\u5165\u4e00\u95f4\u56de\u97f3\u5ba4\uff0c\u91cd\u590d\u548c\u8870\u51cf\u7684\u56de\u97f3\u7ec4\u6210\u4e86\u90a3\u4e2a\u7206\u53d1\u7684\u5468\u671f\u91cd\u590d\uff0c\u5982\u679c\u8fd9\u4e2a\u91cd\u590d\u6301\u7eed\u7684\u65f6\u95f4\u591f\u77ed\u7684\u8bdd\uff0c\u4fbf\u53ef\u4ee5\u5c06\u4e4b\u89c6\u4e3a\u4e00\u4e2a\u97f3\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[71],"tags":[72],"class_list":["post-1235","post","type-post","status-publish","format-standard","hentry","category-supercollider3","tag-sc"],"blocksy_meta":[],"_links":{"self":[{"href":"https:\/\/learn.travelchinawith.me\/index.php?rest_route=\/wp\/v2\/posts\/1235","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/learn.travelchinawith.me\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/learn.travelchinawith.me\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/learn.travelchinawith.me\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/learn.travelchinawith.me\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1235"}],"version-history":[{"count":4,"href":"https:\/\/learn.travelchinawith.me\/index.php?rest_route=\/wp\/v2\/posts\/1235\/revisions"}],"predecessor-version":[{"id":1238,"href":"https:\/\/learn.travelchinawith.me\/index.php?rest_route=\/wp\/v2\/posts\/1235\/revisions\/1238"}],"wp:attachment":[{"href":"https:\/\/learn.travelchinawith.me\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1235"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/learn.travelchinawith.me\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1235"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/learn.travelchinawith.me\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1235"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}