nice post!!

Thanks for the pointers! Here's my version, implemented inside a Windows Form app in conjunction with a timer that checks for sound output:

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 CSCore.CoreAudioAPI;


namespace SoundCheckNext
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}


private void Form1_Load(object sender, EventArgs e)
{

}


// Gets the default device for the system
public static MMDevice GetDefaultRenderDevice()
{
using (var enumerator = new MMDeviceEnumerator())
{
return enumerator.GetDefaultAudioEndpoint(DataFlow.Render, Role.Console);
}
}


// Checks if audio is playing on a certain device
public static bool IsAudioPlaying(MMDevice device)
{
using (var meter = AudioMeterInformation.FromDevice(device))
{
return meter.PeakValue > 0;
}
}


private void timer1_Tick(object sender, EventArgs e)
{
textBox1.Text = "Sound playing: " + IsAudioPlaying(GetDefaultRenderDevice()).ToString();
}
}
}


Thanks for the code. I had to use `meter.PeakValue > 0 && meter.PeakValue < 1`, because when no sound is playing, it gives either 0, or garbage values above 1. When the sound is playing, the value is always within the range.

Four years later, nice article !