16

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?

Jiaaro
  • 71,020
  • 40
  • 161
  • 188
Dayvid Oliveira
  • 1,057
  • 12
  • 33

1 Answers1

13

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)
Jiaaro
  • 71,020
  • 40
  • 161
  • 188
  • 1
    When I try this I get IndexError: too many indices on line "channel1 = signal[:,0]" – hubatish May 29 '16 at 22:22
  • 1
    But er.. .this is cause my file only had one channel. Checked with simple singal.shape print statement Also, prior to numpy version 1.9, I had to use tostring instead of tobytes – hubatish May 29 '16 at 22:51