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#1 2016-03-13 15:37:00

brdvlps
Member
Registered: 2015-12-19
Posts: 13

[SOLVED] GNOME + ALSA + Pulseaudio: Strange, distorted sound output

Yesterday, I wanted to setup my jack2-dbus properly as I'm planning to use my arch linux laptop for music production. In order to prevent audio conflicts between applications, I had the idea of routing pulseaudio sound to jack while routing the sound of alsa applications to pulseaudio.
After fiddling around a bit and not getting it right, I followed this advice on the JACK github wiki. It recommends using Cadence to set up all the routing.
So I tried it, and I assume this fucked up my audio setup...
As there was no sound after following that advice, I reverted all the changes I made. The sound came back, but it's now heavily distorted. Moreover, the volume control of pulseaudio (which belongs to gnome) doesn't affect the volume of my audio output. Using alsamixer, I can control the output volume of my sound card, but this doesn't fix the distortion. Does anybody know what could've possibly gone wrong? After trying some alsa and pulseaudio settings without any result, I have no idea how I can solve this without reinstalling everything.

Some additional information:

/etc/asound.conf:

# Use PulseAudio by default
pcm.!default {
  type pulse
  fallback "sysdefault"
  hint {
    show on
    description "Default ALSA Output (currently PulseAudio Sound Server)"
  }
}

ctl.!default {
  type pulse
  fallback "sysdefault"
}

(no ~/.asoundrc)

/etc/pulse/client.conf:

...
autospawn = no
...

/etc/pulse/daemon.conf

...
flat-volumes = no
...
default-sample-rate = 44100
...

/etc/pulse/default.pa

.nofail

### Load something into the sample cache
#load-sample-lazy x11-bell /usr/share/sounds/freedesktop/stereo/bell.oga
#load-sample-lazy pulse-hotplug /usr/share/sounds/freedesktop/stereo/device-added.oga
#load-sample-lazy pulse-coldplug /usr/share/sounds/freedesktop/stereo/device-added.oga
#load-sample-lazy pulse-access /usr/share/sounds/freedesktop/stereo/message.oga

.fail

### Automatically restore the volume of streams and devices
load-module module-device-restore
load-module module-stream-restore
load-module module-card-restore

### Automatically augment property information from .desktop files
### stored in /usr/share/application
load-module module-augment-properties

### Should be after module-*-restore but before module-*-detect
load-module module-switch-on-port-available

### Load audio drivers statically
### (it's probably better to not load these drivers manually, but instead
### use module-udev-detect -- see below -- for doing this automatically)
#load-module module-alsa-sink
#load-module module-alsa-source device=hw:1,0
#load-module module-oss device="/dev/dsp" sink_name=output source_name=input
#load-module module-oss-mmap device="/dev/dsp" sink_name=output source_name=input
#load-module module-null-sink
#load-module module-pipe-sink

### Automatically load driver modules depending on the hardware available
.ifexists module-udev-detect.so
load-module module-udev-detect ignore_dB=1
.else
### Use the static hardware detection module (for systems that lack udev support)
load-module module-detect
.endif

### Automatically connect sink and source if JACK server is present
.ifexists module-jackdbus-detect.so
.nofail
load-module module-jackdbus-detect channels=2
.fail
.endif

### Automatically load driver modules for Bluetooth hardware
.ifexists module-bluetooth-policy.so
load-module module-bluetooth-policy
.endif

.ifexists module-bluetooth-discover.so
load-module module-bluetooth-discover
.endif

### Load several protocols
.ifexists module-esound-protocol-unix.so
load-module module-esound-protocol-unix
.endif
load-module module-native-protocol-unix

### Network access (may be configured with paprefs, so leave this commented
### here if you plan to use paprefs)
#load-module module-esound-protocol-tcp
#load-module module-native-protocol-tcp
#load-module module-zeroconf-publish

### Load the RTP receiver module (also configured via paprefs, see above)
#load-module module-rtp-recv

### Load the RTP sender module (also configured via paprefs, see above)
#load-module module-null-sink sink_name=rtp format=s16be channels=2 rate=44100 sink_properties="device.description='RTP Multicast Sink'"
#load-module module-rtp-send source=rtp.monitor

### Load additional modules from GConf settings. This can be configured with the paprefs tool.
### Please keep in mind that the modules configured by paprefs might conflict with manually
### loaded modules.
.ifexists module-gconf.so
.nofail
load-module module-gconf
.fail
.endif

### Automatically restore the default sink/source when changed by the user
### during runtime
### NOTE: This should be loaded as early as possible so that subsequent modules
### that look up the default sink/source get the right value
load-module module-default-device-restore

### Automatically move streams to the default sink if the sink they are
### connected to dies, similar for sources
load-module module-rescue-streams

### Make sure we always have a sink around, even if it is a null sink.
load-module module-always-sink

### Honour intended role device property
load-module module-intended-roles

### Automatically suspend sinks/sources that become idle for too long
load-module module-suspend-on-idle

### If autoexit on idle is enabled we want to make sure we only quit
### when no local session needs us anymore.
.ifexists module-console-kit.so
load-module module-console-kit
.endif
.ifexists module-systemd-login.so
load-module module-systemd-login
.endif

### Enable positioned event sounds
load-module module-position-event-sounds

### Cork music/video streams when a phone stream is active
load-module module-role-cork

### Modules to allow autoloading of filters (such as echo cancellation)
### on demand. module-filter-heuristics tries to determine what filters
### make sense, and module-filter-apply does the heavy-lifting of
### loading modules and rerouting streams.
load-module module-filter-heuristics
load-module module-filter-apply

# X11 modules should not be started from default.pa so that one daemon
# can be shared by multiple sessions.

### Load X11 bell module
#load-module module-x11-bell sample=x11-bell

### Register ourselves in the X11 session manager
#load-module module-x11-xsmp

### Publish connection data in the X11 root window
#.ifexists module-x11-publish.so
#.nofail
#load-module module-x11-publish
#.fail
#.endif

### Make some devices default
#set-default-sink output
#set-default-source input

/etc/pulse/system.pa

### Automatically load driver modules depending on the hardware available
.ifexists module-udev-detect.so
load-module module-udev-detect
.else
### Use the static hardware detection module (for systems that lack udev/hal support)
load-module module-detect
.endif

### Load several protocols
.ifexists module-esound-protocol-unix.so
load-module module-esound-protocol-unix
.endif
load-module module-native-protocol-unix

### Automatically restore the volume of streams and devices
load-module module-stream-restore
load-module module-device-restore

### Automatically restore the default sink/source when changed by the user
### during runtime
### NOTE: This should be loaded as early as possible so that subsequent modules
### that look up the default sink/source get the right value
load-module module-default-device-restore

### Automatically move streams to the default sink if the sink they are
### connected to dies, similar for sources
load-module module-rescue-streams

### Make sure we always have a sink around, even if it is a null sink.
load-module module-always-sink

### Automatically suspend sinks/sources that become idle for too long
load-module module-suspend-on-idle

### Enable positioned event sounds
load-module module-position-event-sounds

aplay -l (I'm not sure, but I think the output looks different than before)

**** List of PLAYBACK Hardware Devices ****
card 0: broadwellrt286 [broadwell-rt286], device 0: System Playback/Capture (*) []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: broadwellrt286 [broadwell-rt286], device 1: Offload0 Playback (*) []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: broadwellrt286 [broadwell-rt286], device 2: Offload1 Playback (*) []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: HDMI [HDA Intel HDMI], device 3: HDMI 0 [HDMI 0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: HDMI [HDA Intel HDMI], device 7: HDMI 1 [HDMI 1]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: HDMI [HDA Intel HDMI], device 8: HDMI 2 [HDMI 2]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

pacmd list-sinks

2 sink(s) available.
    index: 0
	name: <alsa_output.pci-0000_00_03.0.hdmi-stereo>
	driver: <module-alsa-card.c>
	flags: HARDWARE DECIBEL_VOLUME LATENCY FLAT_VOLUME DYNAMIC_LATENCY
	state: SUSPENDED
	suspend cause: IDLE 
	priority: 9950
	volume: front-left: 40120 /  61% / -12,79 dB,   front-right: 40120 /  61% / -12,79 dB
	        balance 0,00
	base volume: 65536 / 100% / 0,00 dB
	volume steps: 65537
	muted: no
	current latency: 0,00 ms
	max request: 0 KiB
	max rewind: 0 KiB
	monitor source: 0
	sample spec: s32le 2ch 44100Hz
	channel map: front-left,front-right
	             Stereo
	used by: 0
	linked by: 0
	configured latency: 0,00 ms; range is 0,50 .. 4000,36 ms
	card: 0 <alsa_card.pci-0000_00_03.0>
	module: 6
	properties:
		alsa.resolution_bits = "32"
		device.api = "alsa"
		device.class = "sound"
		alsa.class = "generic"
		alsa.subclass = "generic-mix"
		alsa.name = "HDMI 0"
		alsa.id = "HDMI 0"
		alsa.subdevice = "0"
		alsa.subdevice_name = "subdevice #0"
		alsa.device = "3"
		alsa.card = "1"
		alsa.card_name = "HDA Intel HDMI"
		alsa.long_card_name = "HDA Intel HDMI at 0xf7418000 irq 49"
		alsa.driver_name = "snd_hda_intel"
		device.bus_path = "pci-0000:00:03.0"
		sysfs.path = "/devices/pci0000:00/0000:00:03.0/sound/card1"
		device.bus = "pci"
		device.vendor.id = "8086"
		device.vendor.name = "Intel Corporation"
		device.product.id = "160c"
		device.product.name = "Broadwell-U Audio Controller"
		device.form_factor = "internal"
		device.string = "hdmi:1"
		device.buffering.buffer_size = "1411328"
		device.buffering.fragment_size = "705664"
		device.access_mode = "mmap+timer"
		device.profile.name = "hdmi-stereo"
		device.profile.description = "Digital Stereo (HDMI)"
		device.description = "Built-in Audio Digital Stereo (HDMI)"
		alsa.mixer_name = "Intel Broadwell HDMI"
		alsa.components = "HDA:80862808,80860101,00100000"
		module-udev-detect.discovered = "1"
		device.icon_name = "audio-card-pci"
	ports:
		hdmi-output-0: HDMI / DisplayPort (priority 5900, latency offset 0 usec, available: no)
			properties:
				device.icon_name = "video-display"
	active port: <hdmi-output-0>
  * index: 1
	name: <alsa_output.platform-broadwell-audio.HiFi__hw_broadwellrt286__sink>
	driver: <module-alsa-card.c>
	flags: HARDWARE DECIBEL_VOLUME LATENCY FLAT_VOLUME DYNAMIC_LATENCY
	state: SUSPENDED
	suspend cause: IDLE 
	priority: 9000
	volume: front-left: 10036 /  15% / -48,90 dB,   front-right: 10036 /  15% / -48,90 dB
	        balance 0,00
	base volume: 65536 / 100% / 0,00 dB
	volume steps: 65537
	muted: no
	current latency: 0,00 ms
	max request: 0 KiB
	max rewind: 0 KiB
	monitor source: 1
	sample spec: s24-32le 2ch 48000Hz
	channel map: front-left,front-right
	             Stereo
	used by: 0
	linked by: 0
	configured latency: 0,00 ms; range is 0,50 .. 682,67 ms
	card: 1 <alsa_card.platform-broadwell-audio>
	module: 7
	properties:
		alsa.resolution_bits = "32"
		device.api = "alsa"
		device.class = "sound"
		alsa.class = "generic"
		alsa.subclass = "generic-mix"
		alsa.name = ""
		alsa.id = "System Playback/Capture (*)"
		alsa.subdevice = "0"
		alsa.subdevice_name = "subdevice #0"
		alsa.device = "0"
		alsa.card = "0"
		alsa.card_name = "broadwell-rt286"
		alsa.long_card_name = "broadwell-rt286"
		alsa.driver_name = "snd_soc_sst_broadwell"
		device.bus_path = "platform-broadwell-audio"
		sysfs.path = "/devices/pci0000:00/INT3438:00/broadwell-audio/sound/card0"
		device.vendor.name = "Interphase Corporation"
		device.string = "hw:broadwellrt286"
		device.buffering.buffer_size = "262144"
		device.buffering.fragment_size = "131072"
		device.access_mode = "mmap+timer"
		device.profile.name = "HiFi: hw:broadwellrt286: sink"
		device.profile.description = "Speaker playback + Headphones playback"
		device.description = "broadwell-rt286 Speaker playback + Headphones playback"
		module-udev-detect.discovered = "1"
		device.icon_name = "audio-card"
	ports:
		[Out] Speaker: Speaker playback (priority 100, latency offset 0 usec, available: unknown)
			properties:
				
		[Out] Headphones: Headphones playback (priority 100, latency offset 0 usec, available: no)
			properties:
				
	active port: <[Out] Speaker>

EDIT: I kinda solved my problem by just resetting all config files related to pulseaudio/alsa. Will now start from scratch again to get my audio setup right.

Last edited by brdvlps (2016-03-16 18:59:15)

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#2 2018-08-16 06:47:47

archfluke
Member
Registered: 2016-06-08
Posts: 39

Re: [SOLVED] GNOME + ALSA + Pulseaudio: Strange, distorted sound output

Hello. I'm in the same exact situation and unfortunately, I'm not sure what it means to reset all the config files related to pulseaudio/alsa.  I tried removing /etc/pulse after pacman -Rns pulseaudio but upon reinstallation of pulseaudio, I get the same garbled sound.  Thank you.

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#3 2018-08-16 10:09:34

V1del
Forum Moderator
Registered: 2012-10-16
Posts: 21,645

Re: [SOLVED] GNOME + ALSA + Pulseaudio: Strange, distorted sound output

Please don't necrobump a solved thread: https://wiki.archlinux.org/index.php/Co … bumping.22

Open up your own thread posting the details brdvlps included from your own system.

Closing.

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