How to read audio file from google cloud storage bucket and play with ipd in a datalab notebook

Question

I want to play a sound file in a datalab notebook which I read from a google cloud storage bucket. How to do this?

Answer 1

import numpy as np
import IPython.display as ipd
import librosa
import soundfile as sf
import io
from google.cloud import storage

BUCKET = 'some-bucket'

# Create a Cloud Storage client.
gcs = storage.Client()

# Get the bucket that the file will be uploaded to.
bucket = gcs.get_bucket(BUCKET)

# specify a filename
file_name = 'some_dir/some_audio.wav'

# read a blob
blob = bucket.blob(file_name)
file_as_string = blob.download_as_string()

# convert the string to bytes and then finally to audio samples as floats 
# and the audio sample rate
data, sample_rate = sf.read(io.BytesIO(file_as_string))

left_channel = data[:,0]  # I assume the left channel is column zero

# enable play button in datalab notebook
ipd.Audio(left_channel, rate=sample_rate)