Playing audio in jupyter, in a for loop

Question

I have a ton of training data I need annotated, in order to do so I need to listen through a bunch of sound snippets and note what I hear. I wrote a small script for this in a notebook.

My main issue is that IPython display dosent show in loops. As an example:

import numpy
import IPython.display as ipd

sr = 22050# sample rate
T = 2.0# seconds
t = numpy.linspace(0, T, int(T*sr), endpoint=False)# time variable
x = 0.5*numpy.sin(2*numpy.pi*440*t)
ipd.Audio(x, rate=sr)

will show up with an audio box, and I will be able to play the sine wave.

But trying to play anything in a for loop yields nothing (such as:)

for i in range(10000000):
    x = 0.5*numpy.sin(i*numpy.pi*440*t)
    ipd.Audio(x, rate=sr)

If anyone has a good solution for looping through (and listening) a bunch of audio files (one at a time, since I need to loop through potentially hundreds of thousands sound snippets), I would be very much appreciative!

Jannelle

try IPython.display(ipd.Audio(x, rate=sr)) instead of just ipd.Audio(x, rate=sr) – Chante

Possible duplicate of More than one Audio object in a Jupyter (IPython) Notebook cell – Chante

That throws a type error: TypeError: 'module' object is not callable – Jannelle

Not entirely duplicate, I dont want more than one box popping up at a time, I will be looping through potentially hundreds of thousands audio snippets. One box at a time... – Jannelle

SORRY!!! use IPython.display.display(ipd.Audio(x, rate=sr)) – Chante

That works - in the way that it will show all the boxes, I had a look at the other post before posting this. But this is not very useful, for when I need to run it through the real data – Jannelle

I added the answer for other people :) – Chante

Answer 1

To display the audio files within the for loop, you need to use IPython.display.display with the Audio object like so:

import numpy
import IPython.display as ipd


for i in range(10000000):
    x = 0.5*numpy.sin(i*numpy.pi*440*t)
    ipd.display(ipd.Audio(x, rate=sr))

Chante

Do you know of a way of destroying the display after consuming it (there is nothing in the documentation, ipython.org/ipython-doc/3/api/generated/IPython.display.html)? This will print an awful lot of displays and destroy my RAM... :D – Jannelle

Try ipd.set_matplotlib_close(close=True) after the ipd.display() – Chante

strangely, this displays 10000000 players in my jupyter – Eudoca

Have you tried ipd.set_matplotlib_close(close=True) after the ipd.display()? – Chante

Answer 2

my answer was deleted. but if you want a continuous loop you can use the method i described here https://mcmap.net/q/1921359/-how-to-play-audio-in-loop-in-google-colab which is a = Audio(...); a.autoplay_attr = lambda: 'autoplay="autoplay" loop="loop"'

Olnay