Audio recordings crackle

[Brad Magyar]

I still have small crackles in my line input audio, even after trying everything suggested in https://wiki.ubuntu.com/Audio/PositionReporting

I also lowered the line boost level in alsamixer, which helped, but there are still slight pops and cracks every second or two, depending on the level of audio coming in.

System info
Description: Ubuntu 17.04
Release: 17.04

pulseaudio:
  Installed: 1:10.0-1ubuntu2
  Candidate: 1:10.0-1ubuntu2
  Version table:
 *** 1:10.0-1ubuntu2 500
        500 http://mirror.steadfast.net/ubuntu zesty/main amd64 Packages
        100 /var/lib/dpkg/status

alsa-base:
  Installed: 1.0.25+dfsg-0ubuntu5
  Candidate: 1.0.25+dfsg-0ubuntu5
  Version table:
 *** 1.0.25+dfsg-0ubuntu5 500
        500 http://mirror.steadfast.net/ubuntu zesty/main amd64 Packages
        500 http://mirror.steadfast.net/ubuntu zesty/main i386 Packages
        100 /var/lib/dpkg/status

ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: pulseaudio 1:10.0-1ubuntu2
ProcVersionSignature: Ubuntu 4.10.0-22.24-generic 4.10.15
Uname: Linux 4.10.0-22-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.4-0ubuntu4.1
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: brad 2455 F.... pulseaudio
 /dev/snd/controlC1: brad 2455 F.... pulseaudio
Date: Sat Jun 3 13:56:58 2017
InstallationDate: Installed on 2017-04-23 (41 days ago)
InstallationMedia: Kubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
PulseList:
 Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not accessible: Permission denied
 No PulseAudio daemon running, or not running as session daemon.
SourcePackage: pulseaudio
Symptom: audio
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/21/2017
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P2.30
dmi.board.name: X370 Killer SLI/ac
dmi.board.vendor: ASRock
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP2.30:bd04/21/2017:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnX370KillerSLI/ac:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: To Be Filled By O.E.M.
dmi.product.version: To Be Filled By O.E.M.
dmi.sys.vendor: To Be Filled By O.E.M.

[dino99 (9d9)]

That version is now dead
http://news.softpedia.com/news/ubuntu-17-04-zesty-zapus-has-reached-end-of-life-upgrade-to-ubuntu-17-10-now-519360.shtml