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I am currently studying signal processing and I'm working with the librosa library quite a lot. I want to know what is the data that is delivered by the librosa.load method when I read an audio(.wav) file using it. Is it the instantaneous sound pressure in pa? or just the instantaneous amplitude of the sound signal with no unit?

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Please be informed that the ibrosa.load yields a time series that in librosa glossary is defined as:

The time series is an audio signal, which is generally indicated by y, and described as a 1-D numpy.ndarray of floating-point values.

The amplitude is normally estimated as a method of the difference in pressure around the microphone or receiver device that first picked up the audio.

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