Crackling in PulseAudio when using src-linear or src-sinc-fastest resamplers with 22050Hz audio

[Stephan Sokolow]

On my system, I had problems with excess CPU usage and tried to resolve them by using a simpler resampling algorithm. However, that resulted in crackling audio from DOSBox and Windows 3.1 games running under Wine 1.2.x.

(Both are configured to output audio at 22050Hz, with which ALSA dmix has no problem, and, in the case of the Windows 3.1 games, that's not something that can be changed as far as I know.)

Nothing I tried seemed to help and I was forced to return to speex-float-1.

(As such, the pulseaudio config files in the debug dump don't represent PA in a broken configuration... just one that consumes more CPU than I'd like it to.)

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: pulseaudio 1:4.0-0ubuntu11
ProcVersionSignature: Ubuntu 3.13.0-35.62-generic 3.13.11.6
Uname: Linux 3.13.0-35-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.14.1-0ubuntu3.5
Architecture: amd64
CurrentDesktop: LXDE
Date: Wed Oct 8 06:28:19 2014
InstallationDate: Installed on 2014-08-01 (68 days ago)
InstallationMedia: Lubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.2)
SourcePackage: pulseaudio
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/07/2011
dmi.bios.vendor: Award Software International, Inc.
dmi.bios.version: F2
dmi.board.name: GA-880GMA-USB3
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF2:bd03/07/2011:svnGigabyteTechnologyCo.,Ltd.:pnGA-880GMA-USB3:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnGA-880GMA-USB3:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
dmi.product.name: GA-880GMA-USB3
dmi.sys.vendor: Gigabyte Technology Co., Ltd.
modified.conffile..etc.pulse.daemon.conf: [modified]
modified.conffile..etc.pulse.default.pa: [modified]
mtime.conffile..etc.pulse.daemon.conf: 2014-10-08T06:21:40.701763
mtime.conffile..etc.pulse.default.pa: 2014-10-08T02:32:14.607127