Как изменить акцент (тон/ритм) звука микрофона в реальном времени с помощью NAudio на C#? ⇐ C#

[Anonymous]

Я создаю приложение C#, которое записывает звук с микрофона в реальном времени и воспроизводит его в режиме реального времени. Моя цель — изменить акцент записанного звука, например изменить его тон, ритм и общие характеристики речи для имитации различных акцентов в реальном времени.
Я использую библиотеку NAudio для захват и воспроизведение звука, но я не знаю, как программно изменить характеристики голоса (например, акцент). Я хотел бы изменить такие параметры, как ритм, скорость и тон захваченного звука, но не знаю, как этого добиться без использования внешних API.
using NAudio.Wave;
using System;
using System.Speech.Synthesis;
using System.Windows.Forms;

namespace Microphone
{
public partial class Form1 : Form
{
private WaveInEvent waveIn; // For capturing audio
private BufferedWaveProvider bufferedWaveProvider;
private WaveOutEvent waveOut;
private bool isPlaying = false;
SpeechSynthesizer reader = new SpeechSynthesizer();

public Form1()
{
InitializeComponent();
}

public void StartRecording()
{
try
{
var dialogResult = MessageBox. Show("Do you want to access your microphone?"),
"Microphone Access," MessageBoxButtons. YesNo);
if (dialogResult == DialogResult.Yes)
{
WaveIn = new WaveInEvent
{
Default microphone device
WaveFormat = new WaveFormat(44100, 1) // Mono, 44.1kHz
};

bufferedWaveProvider = new BufferedWaveProvider(waveIn.WaveFormat);
WaveOut = new WaveOutEvent();

waveIn.DataAvailable += OnDataAvailable;

waveIn.StartRecording();
MessageBox.Show("Recording started...");
}
else
{
MessageBox.Show("Microphone access denied.");
}
}
catch (Exception ex)
{
MessageBox.Show("Error starting recording: {ex.Message}");
}
}

private void OnDataAvailable(object sender, WaveInEventArgs e)
{
try
{
bufferedWaveProvider.AddSamples(e.Buffer, 0, e.BytesRecorded);
ProcessAudioData();
}
catch (Exception ex)
{
MessageBox.Show($"Error while streaming data: {ex.Message}");
}
}

private void ProcessAudioData()
{
// Apply accent change to the audio data (adjust rhythm, speed, or tone)
ChangeAccent();
PlayAudioChunk();
}

private void ChangeAccent()
{
// Example of simulating an accent change (altering rhythm and tone)
byte[] buffer = new byte[bufferedWaveProvider.BufferedBytes];
bufferedWaveProvider.Read(buffer, 0, buffer.Length);

for (int i = 0; i < buffer.Length; i += 2) // Assuming 16-bit PCM audio
{
short sample = BitConverter.ToInt16(buffer, i);

// Simulate accent change by modifying the sample rhythm or tone
// For example: adjust the amplitude or speed of the samples
// (This is a simplified approach; a more complex model would require
advanced signal processing techniques.)

sample = (short)(sample * 1.1f); // Slightly boost volume or simulate
rhythm change

// Ensure the sample doesn't overflow
if (sample > short.MaxValue) sample = short.MaxValue;
if (sample < short.MinValue) sample = short.MinValue;

// Write the adjusted sample back to the buffer
byte[] adjustedBytes = BitConverter.GetBytes(sample);
Buffer.BlockCopy(adjustedBytes, 0, buffer, i, 2);
}

// After applying the accent change, write the modified data back to the
provider
bufferedWaveProvider.ClearBuffer();
bufferedWaveProvider.AddSamples(buffer, 0, buffer.Length);
}

private void PlayAudioChunk()
{
try
{
// Only play if there is data available
if (bufferedWaveProvider.BufferedBytes > 0 && !isPlaying)
{
if (waveOut.PlaybackState == PlaybackState.Stopped)
{
AdjustVolume(100.0f); // Optional: Adjust volume here
waveOut.Init(bufferedWaveProvider);
waveOut.Play();
isPlaying = true; // Mark as playing
}
}
}
catch (Exception ex)
{
MessageBox.Show($"Error during playback: {ex.Message}");
}
}

private void AdjustVolume(float volumeFactor)
{
// Adjust the volume of the audio data before playback
byte[] buffer = new byte[bufferedWaveProvider.BufferedBytes];
bufferedWaveProvider.Read(buffer, 0, buffer.Length);

// Modify the audio data to apply the volume adjustment
for (int i = 0; i < buffer.Length; i += 2) // Assuming 16-bit PCM audio
{
short sample = BitConverter.ToInt16(buffer, i);

// Apply the gain to the sample
sample = (short) (sample * volumeFactor);

// Ensure the sample doesn't overflow
if (sample > short.MaxValue) sample = short.MaxValue;
if (sample < short.MinValue) sample = short.MinValue;

// Write the adjusted sample back to the buffer
byte[] adjustedBytes = BitConverter.GetBytes(sample);
Buffer.BlockCopy(adjustedBytes, 0, buffer, i, 2);
}

// After adjusting the volume, write the modified data back to the provider
bufferedWaveProvider.ClearBuffer();
bufferedWaveProvider.AddSamples(buffer, 0, buffer.Length);
}

public void StopRecording()
{
try
{
waveIn.StopRecording();
if (waveOut != null && waveOut.PlaybackState == PlaybackState.Playing)
{
waveOut.Stop();
isPlaying = false; Reset playing state
}
waveOut.Dispose();
MessageBox.Show("Recording stopped.");
}
catch (Exception ex)
{
MessageBox.Show($"Error stopping the recording: {ex.Message}");
}
}

private void button1_Click(object sender, EventArgs e)
{
try
{
StartRecording();
}
catch (UnauthorizedAccessException)
{
MessageBox. Show("Microphone access is denied. Please enable microphone
permissions in the Privacy settings.", "Error," MessageBoxButtons. OK,
MessageBoxIcon.Error);
}
catch (Exception ex)
{
MessageBox.Show($"An error occurred: {ex.Message}", "Error",
MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}

Private void button Stop_Click_1(object sender, EventArgs e)
{
StopRecording();
}
}
}


Подробнее здесь: https://stackoverflow.com/questions/792 ... e-using-na