Pocketsphinx and mic_channel_8

When I try to use Pocketsphinx I’m getting this error.

Error opening audio device mic_channel8 for capture: Connection refused
Traceback (most recent call last):
File “samantha.py”, line 22, in
dic=os.path.join(modelFiles, “5287.dic”)
File “/usr/local/lib/python2.7/dist-packages/pocketsphinx/init.py”, line 206, in init
self.ad = Ad(self.audio_device, self.sampling_rate)
File “/usr/local/lib/python2.7/dist-packages/sphinxbase/ad.py”, line 102, in init
this = _ad.new_Ad(audio_device, sampling_rate)
RuntimeError: new_Ad returned -1

I am not sure what the problem is as I am new to the matrix voice. And there is not much information on how to set up the audio on the device.