Arch - Virtualbox - Alsa - No Sound

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http://www.linuxquestions.org – This is my first Linux forum post so please be gentle. I recently installed Arch in Virtualbox for the first time and everything went (almost) smoothly. It appears that alsa installed correctly, but when I ran speaker-test, I got an error message. I continued with the installation to the point where I am now on the LXDE desktop, but I have no sound. The error message is: [andrew@vbox ~]$ speaker-test speaker-test Playback device is default Stream parameters are 48000Hz, S16_LE, 1 channels Using 16 octaves of pink noise ALSA lib pcm_dmix.c:1022:(snd_pcm_dmix_open) unable to open sla (HowTos)