How to Change Audio Input and Output Devices in WebRTC on macOS with SwiftUI?

[Long Enertee]

Hi everyone,

I am currently working on a macOS application using WebRTC and SwiftUI. I need to enable users to dynamically switch audio input (microphone) and output (speakers) devices within the app, without affecting the system-wide settings.

I’ve implemented custom audio handling using AVAudioEngine and AVCaptureDevice to manage audio input and output. However, I am encountering some issues integrating these changes with WebRTC.

Specifically:

1. The WebRTC library for macOS does not include RTCAudioDevice, so I manually added RTCAudioDevice to create an AudioDeviceModule. Although there are no errors when adding it, I am unable to send and receive audio through WebRTC.

2. I need guidance on:

• Dynamically changing the audio input device (microphone) used by WebRTC.

• Changing the audio output device (speakers) for WebRTC.

• Ensuring that these changes take effect immediately without disrupting the ongoing WebRTC session.

If anyone has experience with this issue or can point me to relevant resources or examples, I would greatly appreciate it!

Thank you in advance for your help!

Best regards

[Henrik Andreasson]

Not sure if it is exactly what you need but here is an example of an externally injected ADM https://github.com/mstyura/RTCAudioDevice

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