Given your .alsoftrc workaround, it seems to me like the problem is in
openal. Please make sure you haven't changed /etc/openal/alsoft.conf
manually to use OSS drivers.
** Changed in: alsa-driver (Ubuntu)
Status: New => Incomplete
** Package changed: alsa-driver (Ubuntu) => openal-soft (Ubuntu)
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Many applications and games have sound issues as default
https://bugs.launchpad.net/bugs/618286
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