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pythonnumpyaudioscipypydub

How to create a pydub AudioSegment using an numpy array?

I have the following code in python

from scipy.io.wavfile import read
rate, signal = read('./data/input.wav')
# get only one channel
signal = signal[:,0] 
# do a bunch of processing here

Now I want to create an pydub segment using 'signal' and 'rate'

audio_segment = pydub.AudioSegment()

So how can I create this audio segment, and after that, how can I get back my signal as an numpy array?

Solution

  • I was able to run this code on my machine:

    from scipy.io.wavfile import read
from pydub import AudioSegment

rate, signal = read("./test/data/test1.wav")
channel1 = signal[:,0]

audio_segment = pydub.AudioSegment(
    channel1.tobytes(), 
    frame_rate=rate,
    sample_width=channel1.dtype.itemsize, 
    channels=1
)

# test that it sounds right (requires ffplay, or pyaudio):
from pydub.playback import play
play(audio_segment)