failed to create AudioBackend

[weegreenblobbie]

A user sent email with the following issue:

I'm getting start to use Nsound(I installed it this morning). I am trying to run the example 1, but I have always the same problem:

~$ python example1.py 
src/Nsound/AudioPlayback.cc:130: Nsound::AudioPlayback::AudioPlayback():: failed to create AudioBackend!
Traceback (most recent call last):
  File "example1.py", line 42, in <module>
    pb = AudioPlayback(sr, 1, 16)
  File "/usr/local/lib/python2.7/dist-packages/Nsound.py", line 2876, in __init__
    this = _Nsound.new_AudioPlayback(sample_rate, channels, bits_per_sample)
RuntimeError: src/Nsound/AudioPlayback.cc:130: Nsound::AudioPlayback::AudioPlayback():: failed to create AudioBackend!

I am using ubunut 15.10 and I have installed all the pre-requirements.