audiometer

Audio level metering library.

Meters

LUFS

Loudness measurement based on ITU-R BS.1770-4

• Integrated: Global loudness across the entire audio
• Momentary: Instantaneous loudness in 100ms intervals

RMS

Exponential Moving Average based measurement with AES17 correction

• Smooths squared sample values using an exponential moving average with 150ms decay time
• Applies +3dB AES17 correction factor
• Not standard Root Mean Square (square root of the mean of squared values over a fixed window)

Peak

Measures the maximum absolute value of normalized samples across all channels