{"id":14550,"date":"2026-07-01T13:03:10","date_gmt":"2026-07-01T04:03:10","guid":{"rendered":"https:\/\/r-dimension.xsrv.jp\/classes_j\/?p=14550"},"modified":"2026-07-01T13:12:48","modified_gmt":"2026-07-01T04:12:48","slug":"frequency-2026","status":"publish","type":"post","link":"https:\/\/r-dimension.xsrv.jp\/classes_j\/frequency-2026\/","title":{"rendered":"\u30a8\u30d5\u30a7\u30af\u30c8\u3001\u5468\u6ce2\u6570\u89e3\u6790"},"content":{"rendered":"\n

\u524d\u56de\u306f\u3001Minim\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u4f7f\u3063\u3066\u97f3\u58f0\u30d5\u30a1\u30a4\u30eb\u3092\u518d\u751f\u3057\u3001\u6ce2\u5f62\u3092\u753b\u9762\u306b\u8868\u793a\u3057\u307e\u3057\u305f\u3002\u4eca\u56de\u306f\u3001\u97f3\u306e\u4e2d\u306b\u542b\u307e\u308c\u308b\u5468\u6ce2\u6570<\/strong>\u3092\u6271\u3044\u307e\u3059\u3002\u5468\u6ce2\u6570\u3092\u4f7f\u3046\u3068\u3001\u4f4e\u3044\u97f3\u3060\u3051\u306b\u53cd\u5fdc\u3055\u305b\u305f\u308a\u3001\u9ad8\u3044\u97f3\u306b\u5408\u308f\u305b\u3066\u56f3\u5f62\u3092\u5909\u5316\u3055\u305b\u305f\u308a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n

\u97f3\u697d\u3084\u58f0\u306f\u3001\u3072\u3068\u3064\u306e\u5358\u7d14\u306a\u97f3\u3067\u306f\u306a\u304f\u3001\u3055\u307e\u3056\u307e\u306a\u5468\u6ce2\u6570\u306e\u97f3\u304c\u6df7\u3056\u3063\u305f\u3082\u306e\u3067\u3059\u3002\u3053\u306e\u30da\u30fc\u30b8\u3067\u306f\u3001\u30d5\u30a3\u30eb\u30bf\u3067\u5468\u6ce2\u6570\u3092\u5909\u5316\u3055\u305b\u308b\u65b9\u6cd5\u3068\u3001FFT\u3092\u4f7f\u3063\u3066\u5468\u6ce2\u6570\u3092\u89e3\u6790\u3059\u308b\u65b9\u6cd5\u3092\u6271\u3044\u307e\u3059\u3002<\/p>\n\n\n\n\n\n\n\n

map()<\/h1>\n\n\n\n

\u307e\u305a\u3001\u97f3\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u3067\u3082\u3088\u304f\u4f7f\u3046map()<\/code>\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002map()<\/code>\u306f\u3001\u3042\u308b\u7bc4\u56f2\u306e\u5024\u3092\u3001\u5225\u306e\u7bc4\u56f2\u306e\u5024\u306b\u5909\u63db\u3059\u308b\u305f\u3081\u306e\u95a2\u6570\u3067\u3059\u3002<\/p>\n\n\n\n

map(value, low1, high1, low2, high2)<\/code><\/pre><\/div>\n\n\n\n
\u305d\u308c\u305e\u308c\u306e\u610f\u5473\u306f\u6b21\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n\n\n\n
\u9805\u76ee<\/th>\u610f\u5473<\/th><\/tr>
value<\/code><\/td>\u5909\u63db\u3057\u305f\u3044\u5024<\/td><\/tr>
low1<\/code><\/td>\u5909\u63db\u524d\u306e\u7bc4\u56f2\u306e\u6700\u5c0f\u5024<\/td><\/tr>
high1<\/code><\/td>\u5909\u63db\u524d\u306e\u7bc4\u56f2\u306e\u6700\u5927\u5024<\/td><\/tr>
low2<\/code><\/td>\u5909\u63db\u5f8c\u306e\u7bc4\u56f2\u306e\u6700\u5c0f\u5024<\/td><\/tr>
high2<\/code><\/td>\u5909\u63db\u5f8c\u306e\u7bc4\u56f2\u306e\u6700\u5927\u5024<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
\u305f\u3068\u3048\u3070\u3001mouseX<\/code>\u306f\u753b\u9762\u306e\u5de6\u7aef\u30670\u3001\u53f3\u7aef\u3067width<\/code>\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u306e\u5024\u3092100\u301c300\u306e\u7bc4\u56f2\u306b\u5909\u63db\u3059\u308b\u3068\u3001\u30de\u30a6\u30b9\u306e\u52d5\u304d\u3092\u5225\u306e\u7bc4\u56f2\u306b\u7f6e\u304d\u63db\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
\u30ea\u30b9\u30c81<\/div>\n\n\n\n
void setup() {\n  size(400, 200);\n}\n\nvoid draw() {\n  background(255);\n\n  \/\/ \u5186\u304c\u52d5\u304f\u7bc4\u56f2\u3092\u7dda\u3067\u8868\u793a\u3059\u308b\n  \/\/ \u3053\u306e\u7dda\u306e\u5de6\u7aef\u304c100\u3001\u53f3\u7aef\u304c300\n  stroke(0);\n  line(100, height \/ 2, 300, height \/ 2);\n\n  \/\/ mouseX\u306f0\u301cwidth\u306e\u7bc4\u56f2\u3067\u5909\u5316\u3059\u308b\n  \/\/ \u305d\u308c\u3092100\u301c300\u306e\u7bc4\u56f2\u306b\u5909\u63db\u3059\u308b\n  float x = map(mouseX, 0, width, 100, 300);\n\n  \/\/ \u5909\u63db\u3057\u305fx\u5ea7\u6a19\u306b\u5186\u3092\u63cf\u304f\n  noStroke();\n  fill(255, 0, 0);\n  ellipse(x, height \/ 2, 20, 20);\n\n  \/\/ \u73fe\u5728\u306e\u5024\u3092\u753b\u9762\u306b\u8868\u793a\u3059\u308b\n  fill(0);\n  text("mouseX: " + mouseX, 20, 30);\n  text("mapped x: " + int(x), 20, 50);\n}<\/code><\/pre><\/div>\n\n\n\n
\u30ed\u30fc\u30d1\u30b9\u30d5\u30a3\u30eb\u30bf\u3001\u30cf\u30a4\u30d1\u30b9\u30d5\u30a3\u30eb\u30bf<\/h1>\n\n\n\n
\u3053\u3053\u304b\u3089\u97f3\u306e\u5468\u6ce2\u6570\u3092\u76f4\u63a5\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb\u3057\u307e\u3059\u3002\u4ee3\u8868\u7684\u306a\u3082\u306e\u306b\u3001\u7279\u5b9a\u306e\u5468\u6ce2\u6570\u3092\u901a\u904e\u3055\u305b\u305f\u308a\u3001\u30ab\u30c3\u30c8\u3057\u305f\u308a\u3059\u308b\u30d5\u30a3\u30eb\u30bf\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
\u30ed\u30fc\u30d1\u30b9\u30d5\u30a3\u30eb\u30bf<\/strong>\u306f\u4f4e\u3044\u5468\u6ce2\u6570\u3092\u901a\u3057\u3001\u9ad8\u3044\u5468\u6ce2\u6570\u3092\u5f31\u304f\u3057\u307e\u3059\u3002\u30cf\u30a4\u30d1\u30b9\u30d5\u30a3\u30eb\u30bf<\/strong>\u306f\u9ad8\u3044\u5468\u6ce2\u6570\u3092\u901a\u3057\u3001\u4f4e\u3044\u5468\u6ce2\u6570\u3092\u5f31\u304f\u3057\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u3001\u3053\u306e2\u3064\u3092\u8a66\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
sample.mp3<\/a>\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9<\/a><\/div>\n\n\n\n
\u30ed\u30fc\u30d1\u30b9\u30d5\u30a3\u30eb\u30bf<\/h2>\n\n\n\n
\u6b21\u306e\u30b5\u30f3\u30d7\u30eb\u3067\u306f\u3001\u30de\u30a6\u30b9\u306e\u6a2a\u4f4d\u7f6e\u3067\u30ed\u30fc\u30d1\u30b9\u30d5\u30a3\u30eb\u30bf\u306e\u5468\u6ce2\u6570\u3092\u5909\u3048\u307e\u3059\u3002\u5de6\u306b\u52d5\u304b\u3059\u307b\u3069\u9ad8\u3044\u97f3\u304c\u5f31\u304f\u306a\u308a\u3001\u53f3\u306b\u52d5\u304b\u3059\u307b\u3069\u9ad8\u3044\u97f3\u3082\u901a\u308a\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
\u30ea\u30b9\u30c82<\/div>\n\n\n\n
import ddf.minim.*;\nimport ddf.minim.effects.*;\n\nMinim minim;\nAudioPlayer player;\nLowPassSP lowPass;  \/\/ \u30ed\u30fc\u30d1\u30b9\u30d5\u30a3\u30eb\u30bf\u3092\u6271\u3046\u305f\u3081\u306e\u5909\u6570\n\nfloat cutoff = 5000;  \/\/ \u30d5\u30a3\u30eb\u30bf\u306e\u57fa\u6e96\u306b\u306a\u308b\u5468\u6ce2\u6570\nfloat waveHeight = 50;\n\nvoid setup() {\n  size(512, 220);\n\n  minim = new Minim(this);\n\n  \/\/ sample.mp3\u3092\u8aad\u307f\u8fbc\u307f\u3001\u30eb\u30fc\u30d7\u518d\u751f\u3059\u308b\n  player = minim.loadFile("sample.mp3", 1024);\n  player.loop();\n\n  \/\/ \u6700\u521d\u306f5000Hz\u3067\u30ed\u30fc\u30d1\u30b9\u30d5\u30a3\u30eb\u30bf\u3092\u4f5c\u308b\n  \/\/ player.sampleRate()\u306f\u3001\u97f3\u58f0\u30d5\u30a1\u30a4\u30eb\u306e\u30b5\u30f3\u30d7\u30ea\u30f3\u30b0\u30ec\u30fc\u30c8\n  lowPass = new LowPassSP(cutoff, player.sampleRate());\n\n  \/\/ \u97f3\u58f0\u306b\u30d5\u30a3\u30eb\u30bf\u3092\u8ffd\u52a0\u3059\u308b\n  player.addEffect(lowPass);\n}\n\nvoid draw() {\n  background(0);\n\n  \/\/ mouseX\u309220\u301c5000Hz\u306b\u5909\u63db\u3059\u308b\n  \/\/ \u5de6\u7aef\u3067\u306f20Hz\u3001\u53f3\u7aef\u3067\u306f5000Hz\u306b\u306a\u308b\n  cutoff = map(mouseX, 0, width, 20, 5000);\n\n  \/\/ \u5909\u63db\u3057\u305f\u5468\u6ce2\u6570\u3092\u30ed\u30fc\u30d1\u30b9\u30d5\u30a3\u30eb\u30bf\u306b\u8a2d\u5b9a\u3059\u308b\n  lowPass.setFreq(cutoff);\n\n  \/\/ \u5de6\u53f3\u306e\u6ce2\u5f62\u306e\u4e2d\u5fc3\u7dda\u3092\u63cf\u304f\n  stroke(80);\n  line(0, 70, width, 70);\n  line(0, 160, width, 160);\n\n  \/\/ \u97f3\u58f0\u30d5\u30a1\u30a4\u30eb\u306e\u6ce2\u5f62\u3092\u767d\u3067\u63cf\u304f\n  stroke(255);\n\n  for (int i = 0; i < player.bufferSize() - 1; i++) {\n    \/\/ i\u756a\u76ee\u3068i+1\u756a\u76ee\u306e\u97f3\u58f0\u30c7\u30fc\u30bf\u3092\u6a2a\u4f4d\u7f6e\u306b\u3059\u308b\n    float x1 = map(i, 0, player.bufferSize() - 1, 0, width);\n    float x2 = map(i + 1, 0, player.bufferSize() - 1, 0, width);\n\n    \/\/ left\u3068right\u306e\u5024\u306f-1.0\u301c1.0\u304f\u3089\u3044\n    \/\/ waveHeight\u3092\u639b\u3051\u308b\u3053\u3068\u3067\u3001\u6ce2\u5f62\u3092\u898b\u3084\u3059\u304f\u3059\u308b\n    float leftY1 = 70 + player.left.get(i) * waveHeight;\n    float leftY2 = 70 + player.left.get(i + 1) * waveHeight;\n\n    float rightY1 = 160 + player.right.get(i) * waveHeight;\n    float rightY2 = 160 + player.right.get(i + 1) * waveHeight;\n\n    line(x1, leftY1, x2, leftY2);\n    line(x1, rightY1, x2, rightY2);\n  }\n\n  \/\/ \u73fe\u5728\u306e\u30d5\u30a3\u30eb\u30bf\u5468\u6ce2\u6570\u3092\u8868\u793a\u3059\u308b\n  fill(255);\n  text("Low Pass Filter", 10, 20);\n  text("cutoff: " + int(cutoff) + " Hz", 10, 40);\n}\n\nvoid mousePressed() {\n  \/\/ \u30de\u30a6\u30b9\u3092\u62bc\u3059\u3068\u3001\u73fe\u5728\u306e\u5468\u6ce2\u6570\u3092\u30b3\u30f3\u30bd\u30fc\u30eb\u306b\u8868\u793a\u3059\u308b\n  println(cutoff);\n}\n\nvoid stop() {\n  player.close();\n  minim.stop();\n  super.stop();\n}<\/code><\/pre><\/div>\n\n\n\n
\u30cf\u30a4\u30d1\u30b9\u30d5\u30a3\u30eb\u30bf<\/h2>\n\n\n\n
\u6b21\u306f\u30cf\u30a4\u30d1\u30b9\u30d5\u30a3\u30eb\u30bf\u3067\u3059\u3002\u30de\u30a6\u30b9\u3092\u53f3\u306b\u52d5\u304b\u3059\u307b\u3069\u3001\u4f4e\u3044\u97f3\u304c\u30ab\u30c3\u30c8\u3055\u308c\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
\u30ea\u30b9\u30c83<\/div>\n\n\n\n
import ddf.minim.*;\nimport ddf.minim.effects.*;\n\nMinim minim;\nAudioPlayer player;\nHighPassSP highPass;  \/\/ \u30cf\u30a4\u30d1\u30b9\u30d5\u30a3\u30eb\u30bf\u3092\u6271\u3046\u305f\u3081\u306e\u5909\u6570\n\nfloat cutoff = 100;\nfloat waveHeight = 50;\n\nvoid setup() {\n  size(512, 220);\n\n  minim = new Minim(this);\n\n  player = minim.loadFile("sample.mp3", 1024);\n  player.loop();\n\n  \/\/ \u6700\u521d\u306f100Hz\u3067\u30cf\u30a4\u30d1\u30b9\u30d5\u30a3\u30eb\u30bf\u3092\u4f5c\u308b\n  highPass = new HighPassSP(cutoff, player.sampleRate());\n\n  \/\/ \u97f3\u58f0\u306b\u30d5\u30a3\u30eb\u30bf\u3092\u8ffd\u52a0\u3059\u308b\n  player.addEffect(highPass);\n}\n\nvoid draw() {\n  background(0);\n\n  \/\/ mouseX\u3092100\u301c10000Hz\u306b\u5909\u63db\u3059\u308b\n  \/\/ \u53f3\u306b\u884c\u304f\u307b\u3069\u3001\u4f4e\u3044\u97f3\u304c\u30ab\u30c3\u30c8\u3055\u308c\u3084\u3059\u304f\u306a\u308b\n  cutoff = map(mouseX, 0, width, 100, 10000);\n\n  \/\/ \u5909\u63db\u3057\u305f\u5468\u6ce2\u6570\u3092\u30cf\u30a4\u30d1\u30b9\u30d5\u30a3\u30eb\u30bf\u306b\u8a2d\u5b9a\u3059\u308b\n  highPass.setFreq(cutoff);\n\n  \/\/ \u5de6\u53f3\u306e\u6ce2\u5f62\u306e\u4e2d\u5fc3\u7dda\u3092\u63cf\u304f\n  stroke(80);\n  line(0, 70, width, 70);\n  line(0, 160, width, 160);\n\n  \/\/ \u97f3\u58f0\u30d5\u30a1\u30a4\u30eb\u306e\u6ce2\u5f62\u3092\u767d\u3067\u63cf\u304f\n  stroke(255);\n\n  for (int i = 0; i < player.bufferSize() - 1; i++) {\n    float x1 = map(i, 0, player.bufferSize() - 1, 0, width);\n    float x2 = map(i + 1, 0, player.bufferSize() - 1, 0, width);\n\n    float leftY1 = 70 + player.left.get(i) * waveHeight;\n    float leftY2 = 70 + player.left.get(i + 1) * waveHeight;\n\n    float rightY1 = 160 + player.right.get(i) * waveHeight;\n    float rightY2 = 160 + player.right.get(i + 1) * waveHeight;\n\n    line(x1, leftY1, x2, leftY2);\n    line(x1, rightY1, x2, rightY2);\n  }\n\n  fill(255);\n  text("High Pass Filter", 10, 20);\n  text("cutoff: " + int(cutoff) + " Hz", 10, 40);\n}\n\nvoid mousePressed() {\n  println(cutoff);\n}\n\nvoid stop() {\n  player.close();\n  minim.stop();\n  super.stop();\n}<\/code><\/pre><\/div>\n\n\n\n
\u30d5\u30a3\u30eb\u30bf\u306f\u3001\u7279\u5b9a\u306e\u5468\u6ce2\u6570\u3092\u901a\u3057\u305f\u308a\u5f31\u3081\u305f\u308a\u3059\u308b\u305f\u3081\u306e\u51e6\u7406\u3067\u3059\u3002\u30ed\u30fc\u30d1\u30b9\u306f\u4f4e\u3044\u97f3\u3092\u901a\u3057\u3001\u30cf\u30a4\u30d1\u30b9\u306f\u9ad8\u3044\u97f3\u3092\u901a\u3059\u3001\u3068\u8003\u3048\u308b\u3068\u7406\u89e3\u3057\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
FFT<\/h1>\n\n\n\n
FFT<\/strong>\u306f\u3001\u97f3\u306e\u4e2d\u306b\u3069\u306e\u5468\u6ce2\u6570\u304c\u3069\u308c\u304f\u3089\u3044\u542b\u307e\u308c\u3066\u3044\u308b\u304b\u3092\u8abf\u3079\u308b\u305f\u3081\u306e\u65b9\u6cd5\u3067\u3059\u3002\u6b63\u5f0f\u306b\u306fFast Fourier Transform\u3001\u9ad8\u901f\u30d5\u30fc\u30ea\u30a8\u5909\u63db\u3068\u547c\u3070\u308c\u307e\u3059\u3002\u6570\u5f0f\u3092\u76f4\u63a5\u66f8\u304b\u306a\u304f\u3066\u3082\u3001Minim\u306eFFT<\/code>\u3092\u4f7f\u3046\u3053\u3068\u3067\u5468\u6ce2\u6570\u306e\u60c5\u5831\u3092\u53d6\u308a\u51fa\u305b\u307e\u3059\u3002<\/p>\n\n\n\n
\u8a73\u3057\u3044\u539f\u7406\u3092\u77e5\u308a\u305f\u3044\u5834\u5408\u306f\u3001\u4ee5\u4e0b\u306e\u30da\u30fc\u30b8\u3082\u53c2\u8003\u306b\u306a\u308a\u307e\u3059\u3002
FFT\u306e\u8aac\u660e<\/a><\/p>\n\n\n\n
\u30b5\u30a6\u30f3\u30c9\u30c7\u30fc\u30bf\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9
frequency.aif<\/a><\/p>\n\n\n\n
\u5404\u7a2e\u30b5\u30a4\u30f3\u6ce2\u306e\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\uff08\u5b66\u5185\u7528\uff09
sinewave.zip<\/a><\/p>\n\n\n\n
\"\"<\/p>\n\n\n\n
\u30ea\u30b9\u30c84<\/div>\n\n\n\n
import ddf.minim.*;\nimport ddf.minim.analysis.*;\n\nMinim minim;\nAudioPlayer player;\nFFT fft;  \/\/ \u5468\u6ce2\u6570\u89e3\u6790\u3092\u884c\u3046\u305f\u3081\u306e\u5909\u6570\n\nvoid setup() {\n  size(1024, 240);\n\n  minim = new Minim(this);\n\n  \/\/ frequency.aif\u3092data\u30d5\u30a9\u30eb\u30c0\u306b\u5165\u308c\u3066\u304a\u304f\n  \/\/ \u7b2c2\u5f15\u6570\u306e1024\u306f\u3001\u89e3\u6790\u306b\u4f7f\u3046\u30d0\u30c3\u30d5\u30a1\u30b5\u30a4\u30ba\n  player = minim.loadFile("frequency.aif", 1024);\n  player.loop();\n\n  \/\/ FFT\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3059\u308b\n  \/\/ player.bufferSize()\u306f1024\n  \/\/ player.sampleRate()\u306f\u591a\u304f\u306e\u5834\u540844100Hz\n  fft = new FFT(player.bufferSize(), player.sampleRate());\n\n  println("sample rate: " + player.sampleRate());\n  println("spec size: " + fft.specSize());\n  println("bandwidth: " + fft.getBandWidth());\n}\n\nvoid draw() {\n  background(255);\n\n  \/\/ player.mix\u306f\u5de6\u53f3\u306e\u97f3\u3092\u6df7\u305c\u305f\u97f3\u58f0\u30c7\u30fc\u30bf\n  \/\/ fft.forward()\u3067\u3001\u305d\u306e\u97f3\u58f0\u30c7\u30fc\u30bf\u3092\u5468\u6ce2\u6570\u6210\u5206\u306b\u5909\u63db\u3059\u308b\n  fft.forward(player.mix);\n\n  \/\/ FFT\u306e\u7d50\u679c\u3092\u7dda\u3067\u8868\u793a\u3059\u308b\n  \/\/ \u5de6\u5074\u304c\u4f4e\u3044\u5468\u6ce2\u6570\u3001\u53f3\u5074\u304c\u9ad8\u3044\u5468\u6ce2\u6570\n  stroke(0);\n\n  for (int i = 0; i < fft.specSize(); i++) {\n    \/\/ i\u756a\u76ee\u306e\u5468\u6ce2\u6570\u5e2f\u57df\u306e\u5f37\u3055\u3092\u53d6\u5f97\u3059\u308b\n    float band = fft.getBand(i);\n\n    \/\/ i\u306e\u5024\u3092\u753b\u9762\u306e\u6a2a\u4f4d\u7f6e\u306b\u5909\u63db\u3059\u308b\n    float x = map(i, 0, fft.specSize() - 1, 0, width);\n\n    \/\/ \u97f3\u306e\u5f37\u3055\u3092\u898b\u3084\u3059\u304f\u3059\u308b\u305f\u3081\u3001\u5c11\u3057\u5927\u304d\u304f\u3057\u3066\u63cf\u304f\n    float lineHeight = band * 4;\n\n    \/\/ \u753b\u9762\u306e\u4e0b\u304b\u3089\u4e0a\u306b\u4f38\u3073\u308b\u7dda\u3092\u63cf\u304f\n    line(x, height, x, height - lineHeight);\n  }\n\n  fill(0);\n  text("FFT Spectrum", 10, 20);\n  text("bandwidth: " + nf(fft.getBandWidth(), 1, 2) + " Hz", 10, 40);\n}\n\nvoid stop() {\n  player.close();\n  minim.stop();\n  super.stop();\n}<\/code><\/pre><\/div>\n\n\n\n
\u30b5\u30f3\u30d7\u30ea\u30f3\u30b0\u30ec\u30fc\u30c8\u304c44100Hz\u3001\u30d0\u30c3\u30d5\u30a1\u30b5\u30a4\u30ba\u304c1024\u306e\u5834\u5408\u30011\u3064\u306e\u5468\u6ce2\u6570\u5e2f\u57df\u306e\u5e45\u306f\u7d0443.07Hz\u306b\u306a\u308a\u307e\u3059\u3002\u3064\u307e\u308a\u3001fft.getBand(23)<\/code>\u306f\u3001\u304a\u3088\u305d990Hz\u4ed8\u8fd1\u306e\u5f37\u3055\u3092\u8868\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\u7279\u5b9a\u306e\u5468\u6ce2\u6570\u306b\u53cd\u5fdc\u3055\u305b\u308b<\/h1>\n\n\n\n
\u6b21\u306e\u30b5\u30f3\u30d7\u30eb\u3067\u306f\u30011000Hz\u30015000Hz\u300110000Hz\u4ed8\u8fd1\u306e\u97f3\u306b\u5186\u306e\u5927\u304d\u3055\u3092\u53cd\u5fdc\u3055\u305b\u307e\u3059\u3002\u3069\u306e\u5468\u6ce2\u6570\u304c\u4f55\u756a\u76ee\u306e\u5e2f\u57df\u306b\u5165\u308b\u304b\u3092\u78ba\u8a8d\u3059\u308b\u305f\u3081\u306b\u3001setup()<\/code>\u5185\u3067\u5e2f\u57df\u306e\u4e00\u89a7\u3092\u30b3\u30f3\u30bd\u30fc\u30eb\u306b\u51fa\u529b\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
\"\"<\/p>\n\n\n\n
1000Hz\u4ed8\u8fd1\u306f23\u756a\u76ee\u306e\u5e2f\u57df\u306b\u542b\u307e\u308c\u308b\u305f\u3081\u3001\u5186\u306e\u5927\u304d\u3055\u306b\u4f7f\u3046\u5834\u5408\u306f\u6b21\u306e\u3088\u3046\u306b\u66f8\u3051\u307e\u3059\u3002<\/p>\n\n\n\n
ellipse(100, 100, fft.getBand(23), fft.getBand(23));<\/code><\/pre><\/div>\n\n\n\n
\u30ea\u30b9\u30c85<\/div>\n\n\n\n
import ddf.minim.*;\nimport ddf.minim.analysis.*;\n\nMinim minim;\nAudioPlayer player;\nFFT fft;\n\nvoid setup() {\n  size(400, 220);\n  noStroke();\n  textFont(createFont("Arial", 14));\n\n  minim = new Minim(this);\n\n  \/\/ sin01000.AIF\u3092data\u30d5\u30a9\u30eb\u30c0\u306b\u5165\u308c\u3066\u304a\u304f\n  \/\/ \u3053\u3053\u3067\u306f1000Hz\u306e\u97f3\u3092\u518d\u751f\u3059\u308b\n  player = minim.loadFile("sin01000.AIF", 1024);\n  player.loop();\n\n  fft = new FFT(player.bufferSize(), player.sampleRate());\n\n  println("sample rate: " + player.sampleRate());\n  println("spec size: " + fft.specSize());\n  println("bandwidth: " + fft.getBandWidth());\n\n  \/\/ \u5404\u5e2f\u57df\u304c\u4f55Hz\u304b\u3089\u4f55Hz\u304f\u3089\u3044\u307e\u3067\u3092\u8868\u3059\u304b\u78ba\u8a8d\u3059\u308b\n  for (int i = 0; i < fft.specSize(); i++) {\n    println(i + " = " + fft.getBandWidth() * i + " ~ " + fft.getBandWidth() * (i + 1));\n  }\n}\n\nvoid draw() {\n  background(0);\n\n  \/\/ \u73fe\u5728\u518d\u751f\u4e2d\u306e\u97f3\u3092\u5468\u6ce2\u6570\u89e3\u6790\u3059\u308b\n  fft.forward(player.mix);\n\n  \/\/ \u305d\u308c\u305e\u308c\u306e\u5468\u6ce2\u6570\u5e2f\u57df\u306e\u5f37\u3055\u3092\u53d6\u308a\u51fa\u3059\n  float level1000 = fft.getBand(23);   \/\/ \u7d041000Hz\n  float level5000 = fft.getBand(116);  \/\/ \u7d045000Hz\n  float level10000 = fft.getBand(232); \/\/ \u7d0410000Hz\n\n  \/\/ \u5024\u304c\u5c0f\u3055\u3044\u3068\u898b\u3048\u306b\u304f\u3044\u306e\u3067\u3001\u5186\u306e\u5927\u304d\u3055\u3068\u3057\u3066\u5c11\u3057\u5927\u304d\u304f\u3059\u308b\n  float size1000 = level1000 * 2;\n  float size5000 = level5000 * 2;\n  float size10000 = level10000 * 2;\n\n  \/\/ \u5468\u6ce2\u6570\u306e\u5f37\u3055\u306b\u5fdc\u3058\u3066\u5186\u3092\u63cf\u304f\n  fill(255);\n  ellipse(100, 110, size1000, size1000);\n  ellipse(200, 110, size5000, size5000);\n  ellipse(300, 110, size10000, size10000);\n\n  \/\/ \u30e9\u30d9\u30eb\u3092\u63cf\u304f\n  fill(255, 0, 0);\n  textAlign(CENTER, CENTER);\n  text("1000Hz", 100, 110);\n  text("5000Hz", 200, 110);\n  text("10000Hz", 300, 110);\n}<\/code><\/pre><\/div>\n\n\n\n
\u52d5\u304d\u3092\u6ed1\u3089\u304b\u306b\u3059\u308b<\/h1>\n\n\n\n
FFT\u306e\u5024\u3092\u305d\u306e\u307e\u307e\u5186\u306e\u5927\u304d\u3055\u306b\u4f7f\u3046\u3068\u3001\u52d5\u304d\u304c\u7d30\u304b\u304f\u9707\u3048\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u3053\u3067\u3001\u73fe\u5728\u306e\u5024\u3092\u76ee\u6a19\u5024\u306b\u5c11\u3057\u305a\u3064\u8fd1\u3065\u3051\u308b\u3053\u3068\u3067\u3001\u52d5\u304d\u3092\u6ed1\u3089\u304b\u306b\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\"\"<\/a><\/p>\n\n\n\n
\u30ea\u30b9\u30c86<\/div>\n\n\n\n
float objY = 0;     \/\/ \u73fe\u5728\u306e\u56db\u89d2\u5f62\u306e\u9ad8\u3055\nfloat targetY = 0;  \/\/ \u76ee\u6a19\u306e\u9ad8\u3055\nfloat distanceY;    \/\/ \u73fe\u5728\u5730\u3068\u76ee\u6a19\u5024\u306e\u5dee\nfloat delay = 10.0; \/\/ \u5024\u304c\u5909\u5316\u3059\u308b\u9045\u3055\n\nvoid setup() {\n  size(400, 400);\n  noStroke();\n}\n\nvoid draw() {\n  background(255);\n\n  \/\/ \u30de\u30a6\u30b9\u3092\u62bc\u3057\u3066\u3044\u308b\u9593\u306f\u3001\u76ee\u6a19\u5024\u3092mouseY\u306b\u3059\u308b\n  if (mousePressed) {\n    targetY = mouseY;\n  } else {\n    targetY = 0;\n  }\n\n  \/\/ \u76ee\u6a19\u5024\u3068\u73fe\u5728\u5024\u306e\u5dee\u3092\u6c42\u3081\u308b\n  distanceY = targetY - objY;\n\n  \/\/ \u5dee\u3092\u4e00\u6c17\u306b\u8db3\u3055\u305a\u3001delay\u3067\u5272\u3063\u305f\u5206\u3060\u3051\u8db3\u3059\n  \/\/ \u3053\u308c\u306b\u3088\u308a\u3001objY\u304ctargetY\u3078\u5c11\u3057\u305a\u3064\u8fd1\u3065\u304f\n  objY = objY + distanceY \/ delay;\n\n  \/\/ objY\u306e\u9ad8\u3055\u3067\u56db\u89d2\u5f62\u3092\u63cf\u304f\n  fill(0);\n  rect(0, 0, width, objY);\n}<\/code><\/pre><\/div>\n\n\n\n
\u3053\u306e\u8003\u3048\u65b9\u3092FFT\u306b\u4f7f\u3046\u3068\u3001\u97f3\u306b\u53cd\u5fdc\u3059\u308b\u56f3\u5f62\u306e\u52d5\u304d\u304c\u6ed1\u3089\u304b\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
\"\"<\/p>\n\n\n\n
\u30ea\u30b9\u30c87<\/div>\n\n\n\n
import ddf.minim.*;\nimport ddf.minim.analysis.*;\n\nMinim minim;\nAudioPlayer player;\nFFT fft;\n\nfloat obj1 = 0;\nfloat obj2 = 0;\nfloat obj3 = 0;\n\nfloat target1;\nfloat target2;\nfloat target3;\n\nfloat distance1;\nfloat distance2;\nfloat distance3;\n\nfloat delay = 10.0;\n\nvoid setup() {\n  size(400, 220);\n  noStroke();\n  textFont(createFont("Arial", 14));\n\n  minim = new Minim(this);\n\n  player = minim.loadFile("frequency.aif", 1024);\n  player.loop();\n\n  fft = new FFT(player.bufferSize(), player.sampleRate());\n\n  println("sample rate: " + player.sampleRate());\n  println("spec size: " + fft.specSize());\n  println("bandwidth: " + fft.getBandWidth());\n}\n\nvoid draw() {\n  background(0);\n\n  \/\/ \u73fe\u5728\u518d\u751f\u4e2d\u306e\u97f3\u3092\u5468\u6ce2\u6570\u89e3\u6790\u3059\u308b\n  fft.forward(player.mix);\n\n  \/\/ \u305d\u308c\u305e\u308c\u306e\u5468\u6ce2\u6570\u5e2f\u57df\u306e\u5f37\u3055\u3092\u76ee\u6a19\u5024\u306b\u3059\u308b\n  target1 = fft.getBand(23) * 2;    \/\/ \u7d041000Hz\n  target2 = fft.getBand(116) * 2;   \/\/ \u7d045000Hz\n  target3 = fft.getBand(232) * 2;   \/\/ \u7d0410000Hz\n\n  \/\/ \u76ee\u6a19\u5024\u3068\u73fe\u5728\u306e\u5927\u304d\u3055\u306e\u5dee\u3092\u6c42\u3081\u308b\n  distance1 = target1 - obj1;\n  distance2 = target2 - obj2;\n  distance3 = target3 - obj3;\n\n  \/\/ \u5dee\u3092\u5c11\u3057\u305a\u3064\u8db3\u3057\u3066\u3001\u73fe\u5728\u306e\u5927\u304d\u3055\u3092\u76ee\u6a19\u5024\u306b\u8fd1\u3065\u3051\u308b\n  obj1 = obj1 + distance1 \/ delay;\n  obj2 = obj2 + distance2 \/ delay;\n  obj3 = obj3 + distance3 \/ delay;\n\n  \/\/ \u6ed1\u3089\u304b\u306b\u5909\u5316\u3059\u308b\u5186\u3092\u63cf\u304f\n  fill(255);\n  ellipse(100, 110, obj1, obj1);\n  ellipse(200, 110, obj2, obj2);\n  ellipse(300, 110, obj3, obj3);\n\n  \/\/ \u30e9\u30d9\u30eb\u3092\u63cf\u304f\n  fill(255, 0, 0);\n  textAlign(CENTER, CENTER);\n  text("1000Hz", 100, 110);\n  text("5000Hz", 200, 110);\n  text("10000Hz", 300, 110);\n}\n\nvoid stop() {\n  player.close();\n  minim.stop();\n  super.stop();\n}<\/code><\/pre><\/div>\n\n\n\n
\u914d\u5217\u3092\u4f7f\u3063\u3066\u8907\u6570\u306e\u5468\u6ce2\u6570\u306b\u53cd\u5fdc\u3055\u305b\u308b<\/h1>\n\n\n\n
\u6700\u5f8c\u306b\u3001\u914d\u5217\u3092\u4f7f\u3063\u3066\u8907\u6570\u306e\u5186\u3092\u53cd\u5fdc\u3055\u305b\u307e\u3059\u3002\u3053\u3053\u3067\u306f233\u500b\u306e\u5468\u6ce2\u6570\u5e2f\u57df\u3092\u4f7f\u3044\u3001\u305d\u308c\u305e\u308c\u306e\u5f37\u3055\u306b\u5408\u308f\u305b\u3066\u5186\u306e\u5927\u304d\u3055\u3092\u5909\u3048\u307e\u3059\u3002<\/p>\n\n\n\n
\"\"<\/a><\/p>\n\n\n\n
\u30ea\u30b9\u30c88<\/div>\n\n\n\n
import ddf.minim.*;\nimport ddf.minim.analysis.*;\n\nMinim minim;\nAudioPlayer player;\nFFT fft;\n\n\/\/ 233\u500b\u306e\u5186\u3092\u6271\u3046\u305f\u3081\u306e\u914d\u5217\nfloat[] obj = new float[233];      \/\/ \u73fe\u5728\u306e\u5186\u306e\u5927\u304d\u3055\nfloat[] target = new float[233];   \/\/ \u76ee\u6a19\u306e\u5186\u306e\u5927\u304d\u3055\nfloat[] distance = new float[233]; \/\/ \u73fe\u5728\u5024\u3068\u76ee\u6a19\u5024\u306e\u5dee\n\nfloat delay = 10.0;\n\nvoid setup() {\n  size(500, 220);\n  noStroke();\n\n  minim = new Minim(this);\n\n  player = minim.loadFile("frequency.aif", 1024);\n  player.loop();\n\n  fft = new FFT(player.bufferSize(), player.sampleRate());\n}\n\nvoid draw() {\n  background(0);\n\n  \/\/ \u73fe\u5728\u518d\u751f\u4e2d\u306e\u97f3\u3092\u5468\u6ce2\u6570\u89e3\u6790\u3059\u308b\n  fft.forward(player.mix);\n\n  \/\/ 233\u500b\u306e\u5468\u6ce2\u6570\u5e2f\u57df\u3092\u9806\u756a\u306b\u8abf\u3079\u308b\n  for (int i = 0; i < 233; i++) {\n\n    \/\/ i\u756a\u76ee\u306e\u5468\u6ce2\u6570\u5e2f\u57df\u306e\u5f37\u3055\u3092\u3001\u5186\u306e\u76ee\u6a19\u30b5\u30a4\u30ba\u306b\u3059\u308b\n    target[i] = fft.getBand(i) * 2;\n\n    \/\/ \u76ee\u6a19\u30b5\u30a4\u30ba\u3068\u73fe\u5728\u30b5\u30a4\u30ba\u306e\u5dee\u3092\u6c42\u3081\u308b\n    distance[i] = target[i] - obj[i];\n\n    \/\/ \u73fe\u5728\u30b5\u30a4\u30ba\u3092\u76ee\u6a19\u30b5\u30a4\u30ba\u306b\u5c11\u3057\u305a\u3064\u8fd1\u3065\u3051\u308b\n    obj[i] = obj[i] + distance[i] \/ delay;\n\n    \/\/ i\u306e\u5024\u3092\u753b\u9762\u4e0a\u306ex\u5ea7\u6a19\u306b\u5909\u63db\u3059\u308b\n    float x = map(i, 0, 232, 0, width);\n\n    \/\/ \u5143\u306e\u30b5\u30f3\u30d7\u30eb\u3068\u540c\u3058\u3088\u3046\u306b\u3001\u5186\u3054\u3068\u306b\u30e9\u30f3\u30c0\u30e0\u306a\u8272\u3092\u3064\u3051\u308b\n    fill(random(255), random(255), random(255), 180);\n\n    \/\/ \u5468\u6ce2\u6570\u306e\u5f37\u3055\u306b\u5fdc\u3058\u3066\u5186\u3092\u63cf\u304f\n    ellipse(x, height \/ 2, obj[i], obj[i]);\n  }\n}\n\nvoid stop() {\n  player.close();\n  minim.stop();\n  super.stop();\n}<\/code><\/pre><\/div>\n\n\n\n
\u3053\u306e\u3088\u3046\u306b\u3001FFT\u3092\u4f7f\u3046\u3068\u97f3\u306e\u4e2d\u306e\u5468\u6ce2\u6570\u6210\u5206\u3092\u53d6\u308a\u51fa\u3057\u3001\u30b0\u30e9\u30d5\u30a3\u30c3\u30af\u306b\u53cd\u6620\u3067\u304d\u307e\u3059\u3002\u97f3\u91cf\u5168\u4f53\u306b\u53cd\u5fdc\u3055\u305b\u308b\u3060\u3051\u3067\u306a\u304f\u3001\u4f4e\u97f3\u3001\u4e2d\u97f3\u3001\u9ad8\u97f3\u306a\u3069\u3001\u7279\u5b9a\u306e\u5468\u6ce2\u6570\u5e2f\u57df\u3054\u3068\u306b\u8868\u73fe\u3092\u5909\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u524d\u56de\u306f\u3001Minim\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u4f7f\u3063\u3066\u97f3\u58f0\u30d5\u30a1\u30a4\u30eb\u3092\u518d\u751f\u3057\u3001\u6ce2… Read more »<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10,11],"tags":[],"class_list":["post-14550","post","type-post","status-publish","format-standard","hentry","category-processing","category-11"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t