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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). For a more customization and options, use the next gen version of this patch.
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.
Scripting
Audio functionality can also be added to your project using the Meta Spark API. The AudioModule lets you retrieve and control audio playback controllers in your project using scripts. The AudioGraphModule can be used to modify audio signals and create custom effects.
