Check audio's sample rate using python

Question

I have over a thousand audio files, and I want to check if their sample rate is 16kHz. To do it manually would take me forever. Is there a way to check the sample rate using python?

what format are the audio files? – ehudk Apr 19 '17 at 09:09 — ehudk, Apr 19 '17 at 09:09

ehudk · Accepted Answer · 2017-04-19T13:07:42.643

17

Python has a builtin module dealing with WAV files.

You can write a simple script that will iterate over all files in some directory. something along the general lines of:

import os
import wave
for file_name in os.listdir(FOLDER_PATH):
    with wave.open(file_name, "rb") as wave_file:
        frame_rate = wave_file.getframerate()
        .... DO WHATEVER ....

edited Apr 19 '17 at 13:07

answered Apr 19 '17 at 09:25

ehudk

510
5
13

I'm glad to hear that! Though your comment about Python 3.x strike me a bit weird since Python 2.7 [has a WAV library as well](https://docs.python.org/2.7/library/wave.html). Anyway, good luck with the rest of your work :-) – ehudk Apr 19 '17 at 13:11
Below Python version 3.4, `wave.open()` doesn't return a context manager. For older Python versions, the call can be wrapped in `contextlib.closing()`. – Matthias Apr 20 '17 at 14:02

score 3 · Answer 2 · answered Feb 28 '18 at 11:59

3

For .wav files the solution might be:

from scipy.io.wavfile import read as read_wav
import os
os.chdir('path') # change to the file directory
sampling_rate, data=read_wav("filename.wav") # enter your filename
print sampling_rate

answered Feb 28 '18 at 11:59

Leah2015

33
5

DSBLR · Answer 3 · 2019-10-31T01:55:40.427

1

I end up getting unknow file format error with the wave package from python. wave-error

Alternatively the sox wrapper in python works for me. pysox

!pip install sox
import sox
sox.file_info.sample_rate("file1.wav")

Hope it helps

edited Oct 31 '19 at 01:55

answered Oct 31 '19 at 01:49

DSBLR

555
5
9

This I have done this on windows. Installing sox in Linux could be a nightmare, because of dependency package and compatibility with Linux version. – DSBLR Oct 31 '19 at 01:51
works perfectly well on linux. Just install sox lib first: '$ sudo apt install sox' – markling May 19 '20 at 18:16

score 0 · Answer 4 · answered Aug 12 '21 at 07:13

0

!pip install pydub

from pydub.utils import mediainfo
info=mediainfo("abc.wav")
print(info)

answered Aug 12 '21 at 07:13

swati sharma

11
4

2

I assume info contains more info than sample rate. could you add which specific method to fetch sample rate? – fuyi Aug 12 '21 at 19:08

score 0 · Answer 5 · answered Jun 12 '23 at 09:38

I use the code given below whenever I want to find the sample rate.

import torchaudio
metadata = torchaudio.info('path/to/audio/file.extension')
print(metadata)

The output will look something like this

AudioMetaData(sample_rate=8000, num_frames=625920, num_channels=1, bits_per_sample=16, encoding=PCM_S)

Check audio's sample rate using python

5 Answers5