Comment 2 for bug 696493

Ok Trevor, looks like your hardware is indeed quite similar to the one in #671814. Please try the following:

1) Make sure no alsa driver overrides (such as https://wiki.ubuntu.com/Audio/InstallingLinuxAlsaDriverModules are installed). Also remove model quirks in /etc/modprobe.d/alsa-base.conf.
2) Download and install http://people.canonical.com/~diwic/temp/alsa-hda-diwic-idt88b-dkms_1.0.23.diwic_all.deb
3) Reboot
4) Test and see if it solves your problem correctly.
5) Please post an alsa-info according to https://wiki.ubuntu.com/Audio/AlsaInfo

Thanks!