I'm working with the librosa library, and
I would like to know what information is returned by the librosa.load function when I read a audio (.wav) file.
Is it the instantaneous sound pressure in pa, or the just the instantaneous amplitude of the sound signal with no units?
To confirm the previous answer, librosa.load returns a time series that in librosa glossary is defined as:
"time series:
Typically an audio signal, denoted by y, and represented as a one-dimensional numpy.ndarray of floating-point values. y[t] corresponds to the amplitude of the waveform at sample t."
The amplitude is usually measured as a function of the change in pressure around the microphone or receiver device that originally picked up the audio. (See more here).