Hello Raymond. I do not really understand what your message means to us or what we should do in your opinion. Either the grammar on this sentence is wrong, or my english is worse than I thought. Nevertheless thank you for pointing out stream volumes and sink volume. Because of that I was to add:
If you have 3 streams connected to one sink, and then one stream changes volume, then the whole sink is rewinded. I am rather sure, that it's this rewind that breaks the audio stream you can record from the sink.monitor source. -- 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/1024955 Title: Changing volume while parec records monitor causes sound to studder Status in “pulseaudio” package in Ubuntu: Incomplete Bug description: Changing volume while parec records monitor causes recorded sound to stutter (synonyms: lag, jump, skips). The output sound does not studder or lag, only the file of the recording suffers from the volume modification. This was tested on audio coming from Firefox/Flash as well as VLC. Both applications produce the same result. How to reproduce: 1) Use the following script which finds the monitor pseudo-device and records its output to a file using sox. #!/bin/bash #This script requires sox, if not installed, run " sudo apt-get install sox" command first. # Get PA sink monitor name: MONITOR=$(pactl list | grep -A2 '^Source #' | grep 'Name: .*\.monitor$' | awk '{print $NF}' | tail -n1) # Record monitor output echo "Recording from $MONITOR" echo "Press Ctrl-C or close window to stop recording" parec -d "$MONITOR" | sox -t raw -r 44100 -sLb 16 -c 2 - ~/output.wav 2) While it is recording, play with the volume controls (top panel volume/speaker icon) to bring the volume all the way down, and then all the way up using your mouses scroll wheel or touchpads scroll functionality. Result: recorded sound stutter or lags Expected: monitor device is not linked to output volume therefore sound should be recorded without interference from regular system use. Question: Trying to find the cause of the interference is beyond me. Could this issue be related to sox? If so, could someone recommend or test this script with a different program? ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: pulseaudio-utils 1:1.1-0ubuntu15.1 ProcVersionSignature: Ubuntu 3.2.0-26.41-generic-pae 3.2.19 Uname: Linux 3.2.0-26-generic-pae i686 NonfreeKernelModules: wl AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24. AplayDevices: **** List of PLAYBACK Hardware Devices **** card 0: Intel [HDA Intel], device 0: ALC268 Analog [ALC268 Analog] Subdevices: 0/1 Subdevice #0: subdevice #0 ApportVersion: 2.0.1-0ubuntu8 Architecture: i386 ArecordDevices: **** List of CAPTURE Hardware Devices **** card 0: Intel [HDA Intel], device 0: ALC268 Analog [ALC268 Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: komputes 1936 F.... pulseaudio komputes 3871 F.... pulseaudio /dev/snd/pcmC0D0p: komputes 3871 F...m pulseaudio Card0.Amixer.info: Card hw:0 'Intel'/'HDA Intel at 0xf0540000 irq 44' Mixer name : 'Realtek ALC268' Components : 'HDA:10ec0268,102802b0,00100101' Controls : 17 Simple ctrls : 10 Date: Sun Jul 15 08:30:10 2012 InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423.2) ProcEnviron: TERM=xterm PATH=(custom, user) LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: pulseaudio UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 04/09/2010 dmi.bios.vendor: Dell Inc. dmi.bios.version: A07 dmi.board.name: CN0J14 dmi.board.vendor: Dell Inc. dmi.board.version: A07 dmi.chassis.type: 8 dmi.chassis.vendor: Dell Inc. dmi.chassis.version: A07 dmi.modalias: dmi:bvnDellInc.:bvrA07:bd04/09/2010:svnDellInc.:pnInspiron910:pvrA07:rvnDellInc.:rnCN0J14:rvrA07:cvnDellInc.:ct8:cvrA07: dmi.product.name: Inspiron 910 dmi.product.version: A07 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1024955/+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
