Develop Reference

SpeechRecognitionEngine seems to be getting no audio inpit

I am trying to use SpeechRecognitionEngine in a C# application under Windows 11
I have tried the default microphone array that works with Cortana. I have tried an USB microphone and a bluetooth one. They all show they are working in Settings->Sound
I cannot get any of the events to fire including SpeechDetected and AudioStateChanged
Here is my code based on the Microsoft example:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Speech.Recognition;
using System.Diagnostics;
namespace Speech_Test
{
public partial class Form1 : Form
{
SpeechRecognitionEngine recognizer = null;
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
try
{
recognizer = new SpeechRecognitionEngine(new System.Globalization.CultureInfo("en-GB"));
Choices services = new Choices(new string[] { "restaurants", "hotels", "gas stations" });
Choices cities = new Choices(new string[] { "Seattle", "Boston", "Dallas" });
GrammarBuilder findServices = new GrammarBuilder("Find");
findServices.Append(services);
findServices.Append("near");
findServices.Append(cities);
Grammar servicesGrammar = new Grammar(findServices);
recognizer.LoadGrammarAsync(servicesGrammar);
recognizer.SpeechDetected +=
new EventHandler<SpeechDetectedEventArgs>(recognizer_SpeechDetected);
recognizer.AudioStateChanged +=
new EventHandler<AudioStateChangedEventArgs>(recognizer_AudioStateChanged);
// Add a handler for the speech recognized event.
recognizer.SpeechRecognized +=
new EventHandler<SpeechRecognizedEventArgs>(recognizer_SpeechRecognized);
recognizer.SpeechRecognitionRejected +=
new EventHandler<SpeechRecognitionRejectedEventArgs>(recognizer_SpeechRejected);
// Configure the input to the speech recognizer.
recognizer.SetInputToDefaultAudioDevice();
recognizer.RecognizeAsync(RecognizeMode.Multiple);
//recognizer.EmulateRecognize("Find restaurants near Dallas");
}
catch (Exception ex)
{
Debug.WriteLine(ex.InnerException.Message);
}
}
// Handle the AudioStateChanged event.
private void recognizer_AudioStateChanged(object sender, AudioStateChangedEventArgs e)
{
Debug.WriteLine("The new audio state is: " + e.AudioState);
}
private void recognizer_SpeechDetected(object sender, SpeechDetectedEventArgs e)
{
Console.WriteLine(" Speech detected at AudioPosition = {0}", e.AudioPosition);
}
private void recognizer_SpeechRecognized(object sender, SpeechRecognizedEventArgs e)
{
Debug.WriteLine("Recognized text: " + e.Result.Text);
}
private void recognizer_SpeechRejected(object sender, SpeechRecognitionRejectedEventArgs e)
{
Debug.WriteLine("Rejected text: " + e.Result.Text);
}
}
}
Any suggestions on how to find out why audio is not getting through?
Thanks

Vlc.dotnet.form pause video with a button

I am hoping someone can help me in getting an issue of mine to work, I feel as if it is an easy one, however not having any luck in fixing what I am trying to do. I want to be able to pause a video which I am playing using vlc.dotnet below is a brief summary of the structure of my code.
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using System.Reflection;
using System.IO;
using Vlc.DotNet.Forms;
using System.Threading;
using Vlc.DotNet.Core;
using System.Diagnostics;
namespace TS1_C
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
button8.Click += new EventHandler(this.button8_Click);
}
void listBox1_MouseDoubleClick(object sender, MouseEventArgs e)
{
string chosen = listBox1.SelectedItem.ToString();
string final = selectedpath2 + "\\" + chosen; //Path
playfile(final);
}
void playfile(string final)
{
var control = new VlcControl();
var currentAssembly = Assembly.GetEntryAssembly();
var currentDirectory = new FileInfo(currentAssembly.Location).DirectoryName;
// Default installation path of VideoLAN.LibVLC.Windows
var libDirectory = new DirectoryInfo(Path.Combine(currentDirectory, "libvlc", IntPtr.Size == 4 ? "win-x86" : "win-x64"));
control.BeginInit();
control.VlcLibDirectory = libDirectory;
control.Dock = DockStyle.Fill;
control.EndInit();
panel1.Controls.Add(control);
control.Play();
}
private void button8_Click(object sender, EventArgs e)
{
}
}
}
As you can see I have one method which takes a double click from an item in a list box and plays it using the method playfile. However I want to be able to pause the video using my button known as button8. I have tried many things even this
control.Paused += new System.EventHandler<VlcMediaPlayerPausedEventArgs>(button8_Click);
Which I put into the playfile method, however nothing seems to work. I am wondering if my whole method in which I play a file using playfile(); is completely wrong. I am hoping someone can help me in trying to achieve what I need
Thank you

Your control should be initialized only once:
private VlcControl control;
public Form1()
{
InitializeComponent();
control = new VlcControl();
var currentAssembly = Assembly.GetEntryAssembly();
var currentDirectory = new FileInfo(currentAssembly.Location).DirectoryName;
// Default installation path of VideoLAN.LibVLC.Windows
var libDirectory = new DirectoryInfo(Path.Combine(currentDirectory, "libvlc", IntPtr.Size == 4 ? "win-x86" : "win-x64"));
control.BeginInit();
control.VlcLibDirectory = libDirectory;
control.Dock = DockStyle.Fill;
control.EndInit();
panel1.Controls.Add(control);
}
then, your play method could be simplified:
void playfile(string url)
{
control.Play(url);
}
And for your pause method:
private void button8_Click(object sender, EventArgs e)
{
control.Pause();
}

Blank Form in C# using speech.recognition

Hi i have situation here i don't know how to solve this. This code is fine with 0 Errors but whenever i do F5 it shows me a blank form with no voice and no recognition please help . Please i really need help can someone help me please.
Now this line is only for "it look like your post is mostly code; please add some more details";
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Speech.Synthesis;
using System.Speech.Recognition;
using System.Threading;
namespace a.i
{
public partial class Form1 : Form
{
SpeechSynthesizer s = new SpeechSynthesizer();
Choices list = new Choices();
public Form1()
{
SpeechRecognitionEngine rec = new SpeechRecognitionEngine();
list.Add(new String[] { "hello", "how are you" });
Grammar gr = new Grammar(new GrammarBuilder(list));
try
{
rec.RequestRecognizerUpdate();
rec.LoadGrammar(gr);
rec.SpeechRecognized += rec_SpeachRecognized;
rec.SetInputToDefaultAudioDevice();
rec.RecognizeAsync(RecognizeMode.Multiple);
}
catch { return; }
s.SelectVoiceByHints(VoiceGender.Neutral);
s.Speak("Hello, my name is Gabriel ChatterBot");
InitializeComponent();
}
public void say(string h)
{
s.Speak(h);
}
private void rec_SpeachRecognized(object sender, SpeechRecognizedEventArgs e)
{
String r = e.Result.Text;
//what you say
if (r == "hello")
{
// what it says
say("hi");
}
//what you say
if (r == "how are you")
{
// what it says
say("Great, and you!");
}
}
}
}

From the exception you posted, I think that you have not initionalized the Grammar and SpeechRecognitionEngine correctly. It seems that you need to specify a language / culture for it. From the documentation at:
https://msdn.microsoft.com/en-us/library/hh378426(v=office.14).aspx
// Create a new SpeechRecognitionEngine instance.
SpeechRecognitionEngine sre = new SpeechRecognitionEngine(new System.Globalization.CultureInfo("en-US"));

voice recognition program using C#

Im trying to build a voice recognition program based on this link :
https://www.youtube.com/watch?v=OJdVfwiTIXE
The problem is..When I run the windows form after compiling, it is not recognizing and responding to my voice commands...I am using .NET framework 4 client profile for this project. I made reference only to "system.speech" and Im using the build in microphone of my laptop for voice input..
Here is my text file(i wrote it line by line from the first line):
hi
hello henry
close
close henry
Here is my code so far :
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.Speech.Recognition;
using System.Speech.Synthesis;
using System.IO;
namespace Henry
{
public partial class Form1 : Form
{
SpeechRecognitionEngine _recognizer = new SpeechRecognitionEngine();
SpeechSynthesizer Henry = new SpeechSynthesizer();
Random rnd = new Random();
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
_recognizer.SetInputToDefaultAudioDevice();
_recognizer.LoadGrammar(new Grammar(new GrammarBuilder(new Choices(File.ReadAllLines(#"C:\Henry\com.txt")))));
_recognizer.SpeechRecognized += new EventHandler<SpeechRecognizedEventArgs>(_recognizer_SpeechRecognized);
_recognizer.RecognizeAsync(RecognizeMode.Multiple);
}
void _recognizer_SpeechRecognized(object sender, SpeechRecognizedEventArgs e)
{
int ranNum = rnd.Next(1, 10);
string speech = e.Result.Text;
switch (speech)
{
//GREETINGS
case "hi":
case "hello henry":
if (ranNum < 6) { Henry.Speak("Hello sir"); }
else if (ranNum > 5) { Henry.Speak("Hi"); }
break;
case "close":
case "close henry":
Henry.Speak("Until next time");
Close();
break;
}
}
}
}

C# SelectVoice not changing in windows application but does in console

So I am trying to change a voice in C# for the System.Speech.Synthesis library. It will work for me when I attempt the code in console mode. However when I am working on a windows application it does not change the voice while giving no errors. Here is the code of the windows application that works asside from the voice change.
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading;
using System.Windows.Forms;
using System.Speech.Synthesis;
using System.Speech.Recognition;
namespace JarvisRev1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
this.button1.Click += new EventHandler(button1_Click);
this.button2.Click += new EventHandler(button2_Click);
this.button3.Click += new EventHandler(button3_Click);
foreach (InstalledVoice voice in sSynth.GetInstalledVoices())
{
cbVoice.Items.Add(voice.VoiceInfo.Name);
}
}
SpeechSynthesizer sSynth = new SpeechSynthesizer();
PromptBuilder pBuilder = new PromptBuilder();
SpeechRecognitionEngine sRecognize = new SpeechRecognitionEngine();
private void button1_Click(object sender, EventArgs e)
{
pBuilder.ClearContent();
pBuilder.AppendText(textBox1.Text);
sSynth.SelectVoice("IVONA 2 Brian");
sSynth.SpeakAsync(pBuilder);
}
private void button2_Click(object sender, EventArgs e)
{
button2.Enabled = false;
button3.Enabled = true;
Choices sList = new Choices();
sList.Add(new string[] { "hello", "test", "it works", "how", "are", "you", "today", "i", "am", "fine", "exit", "close", "quit", "so", "hello how are you" });
Grammar gr = new Grammar(new GrammarBuilder(sList));
try
{
sRecognize.RequestRecognizerUpdate();
sRecognize.LoadGrammar(gr);
sRecognize.SpeechRecognized += sRecognize_SpeechRecognized;
sRecognize.SetInputToDefaultAudioDevice();
sRecognize.RecognizeAsync(RecognizeMode.Multiple);
sRecognize.Recognize();
}
catch
{
return;
}
}
private void button3_Click(object sender, EventArgs e)
{
sRecognize.RecognizeAsyncStop();
button2.Enabled = true;
button3.Enabled = false;
}
private void sRecognize_SpeechRecognized(object sender, SpeechRecognizedEventArgs e)
{
if (e.Result.Text == "exit")
{
Application.Exit();
}
else
{
textBox1.Text = textBox1.Text + " " + e.Result.Text.ToString();
}
}
}
}
This is the code in console mode that is working for me.
using System;
using System.Speech.Synthesis; // Add reference to System.Speech
class Program
{
static void Main(string[] args)
{
var synth = new SpeechSynthesizer();
synth.SelectVoice("IVONA 2 Brian");
synth.SpeakAsync("For you Sir, Always.");
foreach (var voice in synth.GetInstalledVoices())
{
Console.WriteLine(voice.VoiceInfo.Name);
}
Console.ReadLine();
}
}

Have same issue when Microsoft Irina Desktop voice is available in system. Workaround to set voice explicitly in prompt, e.g.:
using System.Speech.Synthesis;
var synth=new SpeechSynthesizer();
var builder=new PromptBuilder();
builder.StartVoice("Microsoft David Desktop");
builder.AppendText("Hello, World!");
builder.EndVoice();
synth.SpeakAsync(new Prompt(builder));
As you already utilize PromptBuilder, try to add StartVoice and EndVoice calls around text.