python convert an array to wav

If you know the sampling frequency of your signal and data is already scaled appropriately by max(abs(data)) then you can do it very easily using scipy:

from __future__
import print_function
import scipy.io.wavfile as wavf
import numpy as np

if __name__ == "__main__":

   samples = np.random.randn(44100)
fs = 44100
out_f = 'out.wav'

wavf.write(out_f, fs, samples)

Suggestion : 2

To write multiple-channels, use a 2-D array of shape (Nsamples, Nchannels).,Writes a simple uncompressed WAV file.,The sample rate (in samples/sec).,The bits-per-sample and PCM/float will be determined by the data-type.

>>> from scipy.io.wavfile
import write
   >>>
   samplerate = 44100;
fs = 100 >>>
   t = np.linspace(0., 1., samplerate) >>>
   amplitude = np.iinfo(np.int16).max >>>
   data = amplitude * np.sin(2. * np.pi * fs * t) >>>
   write("example.wav", samplerate, data.astype(np.int16))

Suggestion : 3

I have audio data recorded from microphone like this : (ndarray of float),But when I play the audio it become broken, nothing but just noise… how to convert it into .wav audio file?,and maybe also convert your data to integers since I think wav files uses only integers values,replace your waveFile.writeframeswith this

> print(data)[-0.00762939 - 0.00817871 - 0.00714111...0.0265511 0.02484207 0.02377392]

while (recording):
   frames.append(data)

waveFile = wave.open(WAVE_OUTPUT_FILENAME + "_" + str(COUNT_FILE) + ".wav", 'wb')
waveFile.setnchannels(CHANNELS)
waveFile.setsampwidth(audio.get_sample_size(FORMAT))
waveFile.setframerate(RATE)
waveFile.wr(b ''.join(frames))
waveFile.close()

data = struct.pack('h' * len(frames), * frames)
waveFile.writeframes(data)

Suggestion : 4

wavio.write writes a numpy array to a WAV file, optionally using a specified sample width.,wavio.read reads a WAV file and returns an object that holds the sampling rate, sample width (in bytes), and a numpy array containing the data.,The following code (also found in the docstring of wavio.write) writes a three second 440 Hz sine wave to a 24-bit WAV file:,A Python module for reading and writing WAV files using numpy arrays.

The following code (also found in the docstring of wavio.write) writes a three second 440 Hz sine wave to a 24-bit WAV file:

import numpy as np
import wavio

rate = 22050 # samples per second
T = 3 # sample duration(seconds)
f = 440.0 # sound frequency(Hz)
t = np.linspace(0, T, T * rate, endpoint = False)
x = np.sin(2 * np.pi * f * t)
wavio.write("sine24.wav", x, rate, sampwidth = 3)

Suggestion : 5

Last Updated : 24 Jan, 2021,GATE CS 2021 Syllabus

First We Need To Install ffmpeg. It Is A Free Open Source Software Project Consist of a Large Suite Of Libraries And Programs For Handling Video, Audio, And Other Multimedia Files.

sudo apt - get install ffmpeg

So First Let Us Install pydub. This is an Audio Manipulation Module. Python Provides a Module Called pydub to Work With Audio Files. pydub is a Python library to work with only .wav files.

sudo apt - get install - y python - pydub