On Sun, Aug 07, 2016 at 12:12:10AM -0400, Tom Law wrote:
  I just installed Ubuntu trusty (on crouton on an Acer
Chromebook), and am
 trying to get sound going (so I can run Super-Collider.)
 Upon the advice of various webpages I've come across that discuss
 installation of Super-Collider, I've tried:
    - removing pulseaudio
    - adding myself to the "hwaudio" group
    - adding '@audio' entries to /etc/security/limits.conf 
Don't know if this is the reason for the problem, but '@audio' entries
in /etc/security/limits.conf will only apply to members of "audio"
group, not "hwaudio".
John