[Z170X-Gaming 7, Creative CA0132, Green Line Out, Rear] No sound at all

No sound output. I don't see the CA0132 devices listed in the sound settings GUI either.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 4.15.0-47.50-generic 4.15.18
Uname: Linux 4.15.0-47-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.9-0ubuntu7.6
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: archeetos 1879 F.... pulseaudio
 /dev/snd/controlC1: archeetos 1879 F.... pulseaudio
CurrentDesktop: ubuntu:GNOME
Date: Sun Apr 7 14:04:20 2019
InstallationDate: Installed on 2017-03-18 (749 days ago)
InstallationMedia: Ubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215.2)
PackageArchitecture: all
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:PCH failed
Symptom_Card: Built-in Audio - HDA Intel PCH
Symptom_DevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: gdm 1476 F.... pulseaudio
                      archeetos 1879 F.... pulseaudio
 /dev/snd/controlC1: gdm 1476 F.... pulseaudio
                      archeetos 1879 F.... pulseaudio
Symptom_Jack: Green Line Out, Rear
Symptom_Type: No sound at all
Title: [Z170X-Gaming 7, Creative CA0132, Green Line Out, Rear] No sound at all
UpgradeStatus: Upgraded to bionic on 2019-04-07 (0 days ago)
dmi.bios.date: 03/09/2018
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: F22m
dmi.board.asset.tag: Default string
dmi.board.name: Z170X-Gaming 7
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: Default string
dmi.chassis.version: Default string
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrF22m:bd03/09/2018:svnGigabyteTechnologyCo.,Ltd.:pnZ170X-Gaming7:pvrDefaultstring:rvnGigabyteTechnologyCo.,Ltd.:rnZ170X-Gaming7:rvrx.x:cvnDefaultstring:ct3:cvrDefaultstring:
dmi.product.family: Default string
dmi.product.name: Z170X-Gaming 7
dmi.product.version: Default string
dmi.sys.vendor: Gigabyte Technology Co., Ltd.