- Meta Spark Studio
- Meta Spark Hub
- Features
- Learn
- Programs
- Blog
- Community
- Create AR effects for Instagram and Meta.Get Started
Energy Meter Patch
Use this patch to estimate the signal power (loudness) of an audio input in a range between 0 (silence) and 1 (max).
Input
| Name | Description |
|---|---|
| Audio | Connect an audio source here, for example a patch representing an audio clip or the microphone. |
| Window | The time window you want to track measured in milliseconds, a smaller window gives a faster reaction to signal power changes. |
| Cut-off | Cutoff frequency in Hz for a low-pass filter. This is applied before the signal power is estimated. |
Outputs
| Name | Description |
|---|---|
| Audio | The audio source to estimate the signal power on. |
| Energy | The power estimated on the most recent time window of the mono audio, or 0 in stereo mode. |
| Energy Left | The power estimated on the most recent time window of the left channel of the stereo audio, or 0 in mono mode. |
| Energy Right | The power estimated on the most recent time window of the right channel of the stereo audio, or 0 in mono mode. |
Example
Follow this tutorial to create a simple effect using the Energy Meter patch. You'll use signals from this patch to animate objects in the scene.
