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pythonaudiopydub

How to get the peak of an audio file in python?

How could I get the dB value of the peak of a wav file (for example, the peak of some wav file could be -6db, aka its loudest point is -6db) using python?

Solution

  • here is an example of using wave, struct and math in Python to get the peak of an audio file.

    import wave
import struct
import math

# Open the audio file
with wave.open('audio.wav', 'r') as audio:
    # Extract the raw audio data
    raw_data = audio.readframes(audio.getnframes())

# Convert the raw audio data to a list of integers
samples = struct.unpack('{n}h'.format(n=audio.getnframes()), raw_data)

# Find the peak sample
peak = max(samples)

# Calculate the reference value based on the bit depth of the audio file
reference_value = 2**(audio.getsampwidth() * 8 - 1)

# Calculate the peak value in dBFS, using the maximum possible sample value as the reference value
peak_dB = 20 * math.log10(peak / reference_value)

print(peak_dB)