Importing speaker results in: Aborted (core dumped)

[ghost]

Installed with npm and I'm getting this error. Installing libasound2-dev doesn't resolve the issue. Ubuntu 18.04

$ node -e "require('speaker')"
ALSA lib conf.c:3523:(snd_config_hooks_call) Cannot open shared library libasound_module_conf_pulse.so
ALSA lib pcm.c:2495:(snd_pcm_open_noupdate) Unknown PCM default
[../deps/mpg123/src/output/alsa.c:165] error: cannot open device default
node: pcm_params.c:2290: snd_pcm_hw_refine: Assertion `pcm && params' failed.
Aborted (core dumped)

[yofreke]

Similar issue here, if I require('speaker') with nothing else I get:

[../deps/mpg123/src/output/alsa.c:165] error: cannot open device default
node: pcm_params.c:2354: snd_pcm_hw_refine: Assertion `pcm && params' failed.

I configured a default alsa device, and heard audio using omxplayer. It seems generally bad that node-speaker is attempting to access the device at a module level. This should probably be moved to a constructor or other instance method.