Awesome

Plugin.Maui.AudioRecorder

Overview

This plugin provides functionality to record audio and transcribe spoken text into written format in real-time, while saving the audio file. It is designed for use with .NET Multi-platform App UI (MAUI) framework.

Features

• Record audio from device microphone
• Real-time transcription of spoken text to written format
• Ability to save the audio file with transcription

Installation

1 - Install the NuGet package Plugin.Maui.AudioRecorder <br/> 2 - In your .NET MAUI project, add the following using statement to MauiProgram.cs file to use this plugin: <br />

using Plugin.Maui.AudioRecorder;

3 - Add this plugin to the MauiApp pipeline: <br />

builder
  // ...
  .UseAudioRecorder()
  // ...

4 - Enjoy it!

Usage

Inject the Audio service

First of all, you must inject the IAudioRecorder service, remembering that in this example we will consider a class that uses MVVM with the CommunityToolkit.Mvvm module.

using CommunityToolkit.Mvvm.ComponentModel;
using Plugin.Maui.AudioRecorder;

namespace MyAwesomeProject.ViewModels;

[ObservableObject]
public partial class RecordingPageViewModel
{
  private readonly IAudioRecorder _audioRecorderService;

  public RecordingPageViewModel(IAudioRecorder audioRecorderService)
  {
    _audioRecorderService = audioRecorderService;
  }

  [ObservableProperty]
  private bool isRecording;

  // ...
}

If you prefer, you can call the instance as follows:

var audioRecorderService = Services.GetService(typeof(IAudioRecorder)) as IAudioRecorder;

// ...

Start Recording

To start the recording we offer the StartRecordAsync method, which can be called in two ways:

• <strong>Without parameters</strong>: In this way we only save the audio in the chosen path, i.e. we do not transcribe the audio for you.

[RelayCommand]
private async void HandleRecord()
{
  // Setting the path of the file
  _audioRecorderService.FilePath = Path.Combine("/storage/emulated/0/Download", fileName);

  await audioService.StartRecordAsync();
}

• <strong>With parameters</strong>: If you want us to return to you, in addition to saving the audio, the transcribed text, you will need to pass three arguments to this method: An CultureInfo instance so we know what language your input audio will be, an IProgress instance, so you decide how the text will be processed, and a CancellationToken, standard for asynchronous methods.

[RelayCommand]
private async void HandleRecord()
{
  // Setting the path of the file
  _audioRecorderService.FilePath = Path.Combine("/storage/emulated/0/Download", fileName);

  await _audioService.StartRecordAsync(
    CultureInfo.GetCultureInfo("en-us"),
    new Progress<string>(partialText =>
    {
      // ...
    }),
    CancellationToken.None,
  );
}

Stop Recording

To stop the recording we offer the StopRecordAsync method:

[RelayCommand]
private async void HandleStopRecord()
{
  // will returns a Audio instance!
  var audio = await _audioService.StopRecordAsync();
}

Limitations

• Transcription accuracy may vary depending on factors such as background noise, speaker accent, and speech speed.
• This plugin only works on android. If you want, you can add support for other platforms via PRs.

License

This plugin is released under the GNU AFFERO GENERAL PUBLIC License. See the LICENSE file for details.