do your 7.1 headset support stereo ? pot the pulseaudio verbose log
https://wiki.ubuntu.com/PulseAudio/Log lsusb -vvvv device.bus = "usb" device.vendor.id = "1532" device.vendor.name = "Razer USA, Ltd" device.product.id = "000e" device.product.name = "Razer Megalodon" device.serial = "Razer_Razer_Megalodon" device.string = "2" device.description = "Razer Megalodon" module-udev-detect.discovered = "1" device.icon_name = "audio-card-usb" profiles: input:analog-mono: Analog Mono Input (priority 1) output:analog-surround-41: Analog Surround 4.1 Output (priority 800) output:analog-surround-41+input:analog-mono: Analog Surround 4.1 Output + Analog Mono Input (priority 801) output:analog-surround-50: Analog Surround 5.0 Output (priority 700) output:analog-surround-50+input:analog-mono: Analog Surround 5.0 Output + Analog Mono Input (priority 701) output:analog-surround-51: Analog Surround 5.1 Output (priority 800) output:analog-surround-51+input:analog-mono: Analog Surround 5.1 Output + Analog Mono Input (priority 801) output:analog-surround-71: Analog Surround 7.1 Output (priority 700) output:analog-surround-71+input:analog-mono: Analog Surround 7.1 Output + Analog Mono Input (priority 701) off: Off (priority 0) active profile: <output:analog-surround-71+input:analog-mono> sinks: alsa_output.usb-Razer_Razer_Megalodon-00-Megalodon.analog-surround-71/#1: Razer Megalodon Analog Surround 7.1 sources: alsa_output.usb-Razer_Razer_Megalodon-00-Megalodon.analog-surround-71.monitor/#1: Monitor of Razer Megalodon Analog Surround 7.1 alsa_input.usb-Razer_Razer_Megalodon-00-Megalodon.analog-mono/#2: Razer Megalodon Analog Mono ports: analog-output: Analog Output (priority 9900, latency offset 0 usec, available: unknown) properties: do your headset have volume control at the audio processing unit ? http://www.razerzone.com/gaming-audio/razer-megalodon/ !!-------Mixer controls for card 2 [Megalodon] Card hw:2 'Megalodon'/'Razer Razer Megalodon at usb-0000:00:1d.0-1.2.1.1, full speed' Mixer name : 'USB Mixer' Components : 'USB1532:000e' Controls : 2 Simple ctrls : 1 Simple mixer control 'PCM',0 Capabilities: pswitch pswitch-joined penum Playback channels: Mono Mono: Playback [on] -- 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/1184025 Title: [USB-Audio - Razer Megalodon, playback] Underruns, dropouts or crackling sound Status in “pulseaudio” package in Ubuntu: Confirmed Bug description: Happens in all apps. Only when audio is playing. ProblemType: Bug DistroRelease: Ubuntu 13.04 Package: pulseaudio 1:3.0-0ubuntu6 ProcVersionSignature: Ubuntu 3.8.0-21.32-generic 3.8.8 Uname: Linux 3.8.0-21-generic x86_64 NonfreeKernelModules: nvidia ApportVersion: 2.9.2-0ubuntu8 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC2: james 2384 F.... pulseaudio /dev/snd/controlC1: james 2384 F.... pulseaudio /dev/snd/controlC0: james 2384 F.... pulseaudio Date: Fri May 24 15:32:18 2013 InstallationDate: Installed on 2012-08-03 (294 days ago) InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425) MarkForUpload: True ProcEnviron: TERM=xterm PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: pulseaudio Symptom: audio Symptom_AlsaPlaybackTest: ALSA playback test through plughw:Megalodon successful Symptom_Card: Razer Megalodon - Razer Megalodon Symptom_PulsePlaybackTest: PulseAudio playback test failed Symptom_Type: Underruns, dropouts, or "crackling" sound Title: [USB-Audio - Razer Megalodon, playback] Underruns, dropouts or crackling sound UpgradeStatus: Upgraded to raring on 2013-05-23 (1 days ago) dmi.bios.date: 11/22/2012 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: P2.70 dmi.board.name: X79 Extreme4-M 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.:bvrP2.70:bd11/22/2012:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnX79Extreme4-M: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. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1184025/+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
