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I've not used 13.04, but on 14.04 I found that pulseaudio+gstreamer was problematic. I found that I could get a more reliable system using ALSA. I've thus added a new parameter "~source" which can be used to specify an arbitrary source input, for instance "alsarsrc" has worked well for me. This is not in debs yet, you would have to install from source (https://github.com/mikeferguson/pocketsphinx)

(for reference, the commit is https://github.com/mikeferguson/pocketsphinx/commit/29628cdf8900ea93c581a786f590a6445ccb4256)

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