Although the relatively long window durations of LUFS and RMS are useful for capturing the audio's dynamics accurately, the relatively slow response times can lead to artifacts in certain scenarios. For example, when the audio is first played, the initial loudness measurements will be very low. This is because the window is initially filled with silence, weighing the measurements down. This ultimately leads to a delay in the measurement response, which ultimately can prevent the initial transient from being compressed at all.
January 23, 2024