using NUnit.Framework;

using System;

using System.Drawing;

using System.Drawing.Imaging;

namespace Spectrogram.Tests

{

public class Quickstart

{

[Test]

public void Test_Quickstart_Hal()

{

(int sampleRate, double[] audio) = WavFile.ReadMono("../../../../../data/cant-do-that-44100.wav");

int fftSize = 4096;

var spec = new Spectrogram(sampleRate, fftSize, stepSize: 500, maxFreq: 3000);

spec.Add(audio);

spec.SaveImage("../../../../../dev/graphics/hal.png", intensity: .2);

Console.WriteLine(spec);

}

[Test]

public void Test_Quickstart_Handel()

{

double[] audio = Mp3.Read("../../../../../data/Handel - Air and Variations.mp3");

int sampleRate = 44100;

int fftSize = 16384;

int targetWidthPx = 3000;

int stepSize = audio.Length / targetWidthPx;

var spec = new Spectrogram(sampleRate, fftSize, stepSize, maxFreq: 2200);

spec.Add(audio);

spec.SaveImage("../../../../../dev/spectrogram-song.jpg", intensity: 5, dB: true);

Console.WriteLine(spec);

/*

Spectrogram (2993, 817)

Vertical (817 px): 0 - 2,199 Hz, FFT size: 16,384 samples, 2.69 Hz/px

Horizontal (2993 px): 2.96 min, window: 0.37 sec, step: 0.06 sec, overlap: 84%

*/

}

}

}