Desktop/PPP/python/audio/Untitled.ipynb

scipy_io_wavwile.ipynb

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  "cells": [
    {
      "metadata": {
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      "source": "# scipyでwavwile作成\n# doc: https://docs.scipy.org/doc/scipy/reference/generated/scipy.io.wavfile.write.html\nimport numpy as np\nimport scipy.io.wavfile as siw\n\nstop = 60    # 再生秒数\nsr = 44100 # サンプリング周波数\nfrq = 440    # 波形の周波数\n\n# フレームの作成 \nrad = np.linspace(0, 2*np.pi * frq * stop, sr * stop)\n\n# 16bidの波形の作成\ny1 = np.sin(rad) * 0.5\ny2 = (y1*np.iinfo(np.int16).max).astype(np.int16)\ny3 = np.array(np.c_[y2,y2]) # ステレオにする\n\n# ファイル名を指定して保存\nfilename = str(frq ) + \"Hz-frequency_\" + str(sr) + \"Hz-SampleRate_\" + str(stop) + \"seconds-duration_sin-1.wav\"\nsiw.write(filename, sr, y3)\nprint(\"finished writing wav. filename = {}\".format(filename))",
      "execution_count": 1,
      "outputs": [
        {
          "output_type": "stream",
          "text": "finished writing wav. filename = 440Hz-frequency_44100Hz-SampleRate_60seconds-duration_sin-1.wav\n",
          "name": "stdout"
        }
      ]
    },
    {
      "metadata": {
        "trusted": true
      },
      "cell_type": "code",
      "source": "# scipyでwavfileの読み込み\n# doc. https://docs.scipy.org/doc/scipy-0.14.0/reference/generated/scipy.io.wavfile.read.html\nsiw.read(filename)",
      "execution_count": 2,
      "outputs": [
        {
          "output_type": "execute_result",
          "execution_count": 2,
          "data": {
            "text/plain": "(44100, array([[    0,     0],\n        [ 1026,  1026],\n        [ 2048,  2048],\n        ...,\n        [-2048, -2048],\n        [-1026, -1026],\n        [    0,     0]], dtype=int16))"
          },
          "metadata": {}
        }
      ]
    },
    {
      "metadata": {
        "trusted": true
      },
      "cell_type": "code",
      "source": "",
      "execution_count": null,
      "outputs": []
    }
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    "kernelspec": {
      "name": "python3",
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