Still present in 15.10, for SPDIF on an Asus p8z77-v (Realtek ALC892, reported in lspci as Intel 7 series/C210 series).
-- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to alsa-driver in Ubuntu. https://bugs.launchpad.net/bugs/359361 Title: ALSA SPDIF Digital output clipping / crackling during playback Status in alsa-driver package in Ubuntu: Confirmed Bug description: When playing sound in Jaunty out of my HDA Intel SPDIF out, loud sounds clip. This is audible because from the strong distortion it produces, which I have seen some people characterize as "crackling". For example, if I go to system->preferences->sound and play the test sound, the sinusoid is audibly clipping. I have all of my sliders in alsamixer zeroed except for master (@100) and IEC958 (@100). Note that if I turn down the volume of the master and/or the IEC958, the clipping is still present---I've gone as low as -21dB (64/100) on both sliders simultaneously, and the clipping is still there. I looked around for solutions, this sounds similar to my problem: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/285866 However, as I noted, I've tried reducing my levels, and my PCM mixer level is all the way at 0 (-58.50 dB) anyway. Not to mention that these are digital outputs, so having them at the 0dB gain position (100% for the master and IEC958 sliders) should be fine... Yes I am certain it's not my speakers clipping. Oddly enough, at one point I was able to get it not to clip in the gnome sound settings control by going through some sequence of trying different backends (various options for ALSA, for OSS, etc.). I have not been able to reliably reproduce the non-clipping, but I will keep trying. For some reason, I hear the clipping when I listen to music using gnome-listen, but not when using Amarok using Xine as the backend. Please help me stop the clipping. ProblemType: Bug Architecture: amd64 ArecordDevices: **** List of CAPTURE Hardware Devices **** card 0: Intel [HDA Intel], device 0: AD198x Analog [AD198x Analog] Subdevices: 2/2 Subdevice #0: subdevice #0 Subdevice #1: subdevice #1 AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/dsp', '/dev/snd/controlC0', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/pcmC0D1p', '/dev/snd/seq', '/dev/snd/timer', '/dev/sequencer2', '/dev/sequencer'] failed with exit code 1: Card0.Amixer.info: Card hw:0 'Intel'/'HDA Intel at 0xfe020000 irq 17' Mixer name : 'Analog Devices AD1984' Components : 'HDA:11d41984,17aa20d7,00100400' Controls : 30 Simple ctrls : 19 DistroRelease: Ubuntu 9.04 Package: alsa-base 1.0.18.dfsg-1ubuntu8 PackageArchitecture: all ProcEnviron: LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: alsa-driver Uname: Linux 2.6.28-11-generic x86_64 --- AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21. Architecture: amd64 ArecordDevices: **** List of CAPTURE Hardware Devices **** card 0: Intel [HDA Intel], device 0: AD198x Analog [AD198x Analog] Subdevices: 2/2 Subdevice #0: subdevice #0 Subdevice #1: subdevice #1 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: edlarson 1435 F.... pulseaudio Card0.Amixer.info: Card hw:0 'Intel'/'HDA Intel at 0xfe020000 irq 17' Mixer name : 'Analog Devices AD1984' Components : 'HDA:11d41984,17aa20d7,00100400' Controls : 29 Simple ctrls : 18 Card29.Amixer.info: Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw 7KHT24WW-1.08' Mixer name : 'ThinkPad EC 7KHT24WW-1.08' Components : '' Controls : 1 Simple ctrls : 1 Card29.Amixer.values: Simple mixer control 'Console',0 Capabilities: pswitch pswitch-joined penum Playback channels: Mono Mono: Playback [on] DistroRelease: Ubuntu 10.04 InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Beta amd64 (20100318) Package: alsa-driver (not installed) ProcEnviron: LANG=en_US.utf8 SHELL=/bin/bash ProcVersionSignature: Ubuntu 2.6.32-21.32-generic 2.6.32.11+drm33.2 Tags: lucid Uname: Linux 2.6.32-21-generic x86_64 UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare dmi.bios.date: 11/14/2008 dmi.bios.vendor: LENOVO dmi.bios.version: 7LETC5WW (2.25 ) dmi.board.name: 7732CTO dmi.board.vendor: LENOVO dmi.board.version: Not Available dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvr7LETC5WW(2.25):bd11/14/2008:svnLENOVO:pn7732CTO:pvrThinkPadR61:rvnLENOVO:rn7732CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 7732CTO dmi.product.version: ThinkPad R61 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/359361/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
