How create av recorder for audio

To create an AV recorder for audio, you can use the AVFoundation framework. Here’s a basic outline of how you can set up an AV recorder for audio:

1. Create an AV capture session: This session coordinates the data flow between the input (microphone) and the output (file).

2. Set up the audio input: Use an AVCaptureDevice to represent the microphone.

3. Set up the audio output: Use an AVCaptureAudioDataOutput to manage the output and write it to disk.

4. Connect the input and output: Use an AVCaptureConnection to connect the input and output.

5. Start the session: Begin the capture session to start recording.

Here’s a sample code snippet to illustrate these steps:

import AVFoundation

// Create a capture session
let captureSession = AVCaptureSession()

// Set up the audio input
guard let audioDevice = AVCaptureDevice.default(for: .audio) else {
    fatalError("No audio device found")
}
let audioInput = try AVCaptureDeviceInput(device: audioDevice)
captureSession.addInput(audioInput)

// Set up the audio output
let audioOutput = AVCaptureAudioDataOutput()
captureSession.addOutput(audioOutput)

// Start the session
captureSession.startRunning()

// Set up a file output
let outputFileURL = URL(fileURLWithPath: "path/to/save/audio/file.m4a")
let fileOutput = AVCaptureMovieFileOutput()
captureSession.addOutput(fileOutput)

// Start recording
fileOutput.startRecording(to: outputFileURL, recordingDelegate: self)

For more detailed information, you can refer to the session Build compelling spatial photo and video experiences from WWDC 2024, which covers setting up AV capture sessions and managing inputs and outputs.

If you are interested in capturing screen audio and microphone content specifically, you can use the new API provided by ScreenCaptureKit. For more details, refer to the session Capture HDR content with ScreenCaptureKit.