音频库的信号发生器类 - 持续时间播放
本文关键字:持续时间 播放 信号发生器 音频 | 更新日期: 2023-09-27 17:56:21
>我使用 naudio 生成指定频率的音调,如下所示:
private void gen_Sinus(double frequency)
{
WaveOut _myWaveOut = new WaveOut();
SignalGenerator mySinus = new SignalGenerator(44100, 1);//using NAudio.Wave.SampleProviders;
mySinus.Frequency = frequency;
mySinus.Type = SignalGeneratorType.Sin;
_myWaveOut.Init(mySinus);
_myWaveOut.Play();
}
我希望在单击按钮时,它将在特定时间内播放该音调,该音调将传递给此方法。让我们以它为例:
double toneDuration
我宁愿阻止一些睡眠方法,因为它必须尽可能准确。
您可以使用
OffsetSampleProvider
来执行此操作,并设置Take
持续时间:
var trimmed = new OffsetSampleProvider(signalGenerator);
trimmed.Take = TimeSpan.FromSeconds(10);
waveOut.Init(trimmed);
waveOut.Play();
使用计时器和等待处理程序
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Threading;
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
timer1.Tick += new EventHandler(timer1_Tick);
}
static AutoResetEvent autoEvent = new AutoResetEvent(false);
private void gen_Sinus(double frequency)
{
WaveOut _myWaveOut = new WaveOut();
SignalGenerator mySinus = new SignalGenerator(44100, 1);//using NAudio.Wave.SampleProviders;
mySinus.Frequency = frequency;
mySinus.Type = SignalGeneratorType.Sin;
_myWaveOut.Init(mySinus);
timer1.Interval = 5000;
timer1.Start()
_myWaveOut.Play();
autoEvent.Reset();
autoEvent.WaitOne();
_myWaveOut.Stop();
}
private void timer1_Tick(object sender, EventArgs e)
{
autoEvent.Set();
}
}
}