Audio Injection on iOS Real Devices

Audio Injection allows you to inject microphone input on real iOS devices in the LambdaTest Real Device Cloud.
Use it to test audio-driven flows such as audio verification and in-app recording—without manual mic input.

Key Use Cases

• In-app audio recording
• Audio-based verification/KYC flows

This feature is currently in Beta. We are actively refining it based on real-world usage and feedback.

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Supported APIs & Devices

• API: AVAudioRecorder
• Supported Devices: iOS 14 and above

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Step 1: Upload Audio File

Supported formats: .mp3, .wav
Max size: 15 MB , 100 MB respectively

curl -u "LT_USERNAME:LT_ACCESS_KEY"   -X POST "https://api.lambdatest.com/mfs/v1.0/media/upload"   -F "media_file=@/path/to/test.wav"   -F "type=audio"   -F "custom_id=SampleAudio"

Response

{
  "media_url": "lt://MEDIAID",
  "status": "success"
}

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Step 2: Enable Audio Injection via Capabilities

media can be set here or injected later in the test.

Python

desired_caps = {
  "enableAudioInjection": True,
  "media": "lt://MEDIA123456789"  # optional
}

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Step 3: Control Audio in Test

Inject the uploaded audio file from LambdaTest into the recorder or app when you are at the dedicated space for microphone input.

Inject / Replace File

driver.execute_script('lambda-audio: {"action":"inject","arguments":{"media_url":"lt://MEDIA123..."}}')

Start Audio

driver.execute_script('lambda-audio: {"action":"start"}')

Stop Audio

driver.execute_script('lambda-audio: {"action":"stop"}')

note

The injected audio can come from a standalone audio file or from the audio track of a recorded video.

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