[Inspiron 7720, IDT 92HD91BXX, Black Headphone Out, Right] Sound is distorted

[Don Jorgito]

After update, sounds are distorionated, echoes and low quality.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: pulseaudio 1:4.0-0ubuntu11.1
ProcVersionSignature: Ubuntu 3.13.0-45.74-generic 3.13.11-ckt13
Uname: Linux 3.13.0-45-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.11
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: jlazaro 3645 F.... pulseaudio
 /dev/snd/controlC0: jlazaro 3645 F.... pulseaudio
 /dev/snd/pcmC0D0p: jlazaro 3645 F...m pulseaudio
CurrentDesktop: Unity
Date: Mon Jun 29 17:30:47 2015
InstallationDate: Installed on 2014-06-18 (376 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
SourcePackage: pulseaudio
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:PCH successful
Symptom_Card: Audio Interno - HDA Intel PCH
Symptom_Jack: Black Headphone Out, Right
Symptom_PulsePlaybackTest: PulseAudio playback test failed
Symptom_Type: Digital clip or distortion, or "overdriven" sound
Title: [Inspiron 7720, IDT 92HD91BXX, Black Headphone Out, Right] Sound is distorted
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 06/08/2012
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A02
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 00MT1R
dmi.board.vendor: Dell Inc.
dmi.board.version: FAB1
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: 0.1
dmi.modalias: dmi:bvnDellInc.:bvrA02:bd06/08/2012:svnDellInc.:pnInspiron7720:pvr:rvnDellInc.:rn00MT1R:rvrFAB1:cvnDellInc.:ct8:cvr0.1:
dmi.product.name: Inspiron 7720
dmi.sys.vendor: Dell Inc.