uMicrophoneWebGL

uMicrophoneWebGL enables microphone input buffer access in Unity WebGL builds.

Demo

Recorder

Waveform

Installation

• Unity Package
  • Download the latest .unitypackage from the Release page.
• Git URL (UPM)
  • Add https://github.com/hecomi/uMicrophoneWebGL.git#upm to the Package Manager.
• Scoped Registry (UPM)
  • Add a scoped registry to your project.
    • URL: https://registry.npmjs.com
    • Scope: com.hecomi
  • Install uMicrophoneWebGL in the Package Manager.

MicrophoneWebGL Component

Attach MicrophoneWebGL component to a GameObject. Once attached, the following UI will be displayed:

• Is Auto Start
  • When checked, data collection from the microphone starts automatically at launch.
• Devices
  • Called when a list of devices is constructed.
  • Internally managed by indices (int).
  • It's often unclear which device the user has selected, so it is advised to use this only for debugging purposes. Instead, provide a device selection UI at runtime, as demonstrated in the Recorder example.
• Events
  • Various events can be captured:
  • Ready Event
    • Called once after initialization on the JavaScript side and everything is ready.
  • Device List Event
    • Called when the device list is constructed.
    • A list containing device information is passed as an argument.
  • Start Event
    • Called when a microphone starts.
    • Internally, this corresponds to the completion of navigator.mediaDevices.getUserMedia().
  • End Event
    • Called when a microphone stops.
  • Data Event
    • Called when microphone input buffer data is retrieved.
    • An array of float waveform data is passed as an argument.

API Reference

MicrophoneWebGL component provides the following properties and methods:

Variables / Properties

• bool isAutoStart

  • Corresponds to the Is Auto Start option in the UI. If true, the microphone starts automatically at launch.

• int micIndex

  • Index of the selected microphone device.

• TimingEvent readyEvent

  • Event triggered when the microphone is ready after initialization.

• TimingEvent startEvent

  • Event triggered when the microphone starts recording.

• TimingEvent stopEvent

  • Event triggered when the microphone stops recording.

• DeviceListEvent deviceListEvent

  • Event triggered when the list of available devices is updated.

• DataEvent dataEvent

  • Event triggered when microphone data is available.

• bool isValid { get; }

  • Indicates whether the microphone is in a valid state to be used.

• List<Device> devices { get; }

  • List of available microphone devices.

• Device selectedDevice { get; }

  • Information about the currently selected microphone device.

• bool isRecording { get; }

  • Indicates whether the microphone is currently recording.

Methods

• void Begin()

  • Starts the microphone. Does nothing if the microphone is recording.

• void End()

  • Stops the microphone. Does nothing if the microphone is not recording.

• void RefreshDeviceList()

  • Refreshes the list of microphone devices. The Device List Event is triggered again at the end of the update.