I did a small test on two machines I have here, one ALC888 + front mic and one IDT92xx + internal mic. I tested recording with Capture at +30 dB and Mic Boost at 0 dB, then I tested recording with Capture at 0 dB and Mic Boost at +30 dB.
For both machines, there was no significant difference in quality. So, this is very hardware dependent. We could flip it so that we raise Capture first and then Mic Boost, which would help here, so I'm seriously considering that - but the question is if this has negative effect on other hardware, maybe it's the other way around w r t to quality on other machines? -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to pulseaudio in Ubuntu. https://bugs.launchpad.net/bugs/1085402 Title: PulseAudio overuses 'Boost' control of microphone input producing bad audio quality Status in “pulseaudio” package in Ubuntu: Confirmed Bug description: Om my notebook PulseAudio detects 2 ports on embedded sound card: 1) analog-input-microphone-internal 2) analog-input-microphone PulseAudio module "module-switch-on-port-available" chooses as default port #2 after external microphone is attached and switches back to port #1 after external mike removal. This behavior seems right. However, if I record sound with auto selected port, audio quality is very poor. There is loud noise in background. But if I switch to "wrong" port audio quality becomes great. E.g. I have to manually select "analog-input-microphone-internal" port when I attach external mike and vice versa. Example of record: http://self-perfection.homeip.net/files/2012/external_ru.flac (652 KiB) This record is made via headset microphone. During first half of record source port analog-input-microphone was selected then i switched to port analog-input-microphone-internal. ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: pulseaudio 1:2.1-0ubuntu4 ProcVersionSignature: Ubuntu 3.5.0-18.29-generic 3.5.7 Uname: Linux 3.5.0-18-generic x86_64 ApportVersion: 2.6.1-0ubuntu6 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: self 2150 F.... pulseaudio self 2255 F.... xfce4-volumed Date: Sat Dec 1 16:34:31 2012 InstallationDate: Installed on 2012-07-01 (152 days ago) InstallationMedia: Xubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425) MarkForUpload: True SourcePackage: pulseaudio UpgradeStatus: Upgraded to quantal on 2012-10-21 (40 days ago) dmi.bios.date: 04/03/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: 06QB dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: 300E4Z/300E5Z/300E7Z dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: FAB1 dmi.chassis.asset.tag: Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvr06QB:bd04/03/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn300E4Z/300E5Z/300E7Z:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rn300E4Z/300E5Z/300E7Z:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1: dmi.product.name: 300E4Z/300E5Z/300E7Z dmi.product.version: 0.1 dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1085402/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
