setLoudness abstract method

Future<int?> setLoudness(
  1. double loudness
)

To call RTCVideo.enableVocalInstrumentBalance to adjust the volume of the mixed media file or the PCM audio data, you must pass in its original loudness through this API.

loudness: Original loudness in lufs. The range is [-70.0, 0.0].
When the value is less than -70.0lufs, it will be adjusted to -70.0lufs by default, and if it is more than 0.0lufs, the loudness will not be equalized. The default value is 1.0lufs, which means no processing.

Return value:

  • 0: Success.
  • <0: Failure.

Notes: Call this API only when audio is mixing.

Implementation

Future<int?> setLoudness(double loudness);