load directly an audio file with librosa in dB

Question

Is there a way to directly load an audio file with librosa in dB instead of amplitude as obtained by:

y, sr = librosa.load(filename, sr=None)

score 2 · Answer 1 · answered Sep 13 '17 at 17:40

2

librosa as mentioned in this paper, pulls audio file as one dimensional numpy array.

from the documentation:

An audio signal is represented as a one-dimensional numpy array, denoted as y throughout librosa. Typically the signal y is accompanied by the sampling rate (denoted sr ) which denotes the frequency (in Hz) at which values of y are sampled.

From the code:

>>> type(y)
<type 'numpy.ndarray'>
>>> y
array([-0.00265948, -0.0045677 , -0.00412048, ..., -0.00179085,
       -0.00228079, -0.00238096], dtype=float32)
>>>

librosa makes use of The array elements of y and sampling rate for its calculations and representation.

You may need to elaborate as to "load directly an audio file with librosa in dB" and it's intended purpose.

answered Sep 13 '17 at 17:40

Anil_M

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thanks for your response: the one-dimensional numpy array y represents the audio amplitude for each sample point? – Emanuela Liaci Sep 18 '17 at 11:35
Yes, `numpy` array y represents audio amplitude of each sample point. – Anil_M Sep 18 '17 at 13:05
1

How can I trasfrom the amplitude of each sample point of 1d array (from librosa) to a dB value? Thanks. – Emanuela Liaci Oct 16 '17 at 14:00

load directly an audio file with librosa in dB

1 Answers1