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meyers

Member

Registered: 2016-03-15

Posts: 1

PulseAudio equalizer makes glitches

I want to use the global equalizer on my Asus UX303LA, so I've followed the instructions in Arch Wiki. I've got what I want, but not at all. When I listen to music (for example in Firefox) and receive notification (or change volume, that also cause playback short sound) I've got glitches and short skips. Of course, I've tried various PulseAudio configurations: changing resample-method, sample-format, sample-rate, tsched=0., but it REALLY has no effect: music still have crackling when another audio stream started.

Here is daemon.conf

; another parameters are commented

resample-method = speex-float-1
flat-volumes = no

default-sample-format = s16le
default-sample-rate = 44100
alternate-sample-rate = 48000
default-sample-channels = 2

default-fragments = 2
default-fragment-size-msec = 125

and pactl list sinks

Sink #0
	State: RUNNING
	Name: alsa_output.pci-0000_00_1b.0.analog-stereo
	Description: Встроенное аудио Аналоговый стерео
	Driver: module-alsa-card.c
	Sample Specification: s16le 2ch 44100Hz
	Channel Map: front-left,front-right
	Owner Module: 7
	Mute: no
	Volume: front-left: 38012 /  58% / -14.19 dB,   front-right: 38012 /  58% / -14.19 dB
	        balance 0.00
	Base Volume: 65536 / 100% / 0.00 dB
	Monitor Source: alsa_output.pci-0000_00_1b.0.analog-stereo.monitor
	Latency: 40862 usec, configured 50024 usec
	Flags: HARDWARE HW_MUTE_CTRL HW_VOLUME_CTRL DECIBEL_VOLUME LATENCY 
	Properties:
		alsa.resolution_bits = "16"
		device.api = "alsa"
		device.class = "sound"
		alsa.class = "generic"
		alsa.subclass = "generic-mix"
		alsa.name = "CX20751/2 Analog"
		alsa.id = "CX20751/2 Analog"
		alsa.subdevice = "0"
		alsa.subdevice_name = "subdevice #0"
		alsa.device = "0"
		alsa.card = "1"
		alsa.card_name = "HDA Intel PCH"
		alsa.long_card_name = "HDA Intel PCH at 0xf7d18000 irq 43"
		alsa.driver_name = "snd_hda_intel"
		device.bus_path = "pci-0000:00:1b.0"
		sysfs.path = "/devices/pci0000:00/0000:00:1b.0/sound/card1"
		device.bus = "pci"
		device.vendor.id = "8086"
		device.vendor.name = "Intel Corporation"
		device.product.id = "9c20"
		device.product.name = "8 Series HD Audio Controller"
		device.form_factor = "internal"
		device.string = "front:1"
		device.buffering.buffer_size = "352800"
		device.buffering.fragment_size = "176400"
		device.access_mode = "mmap+timer"
		device.profile.name = "analog-stereo"
		device.profile.description = "Аналоговый стерео"
		device.description = "Встроенное аудио Аналоговый стерео"
		alsa.mixer_name = "Conexant CX20751/2"
		alsa.components = "HDA:14f1510f,1043128f,00100100"
		module-udev-detect.discovered = "1"
		device.icon_name = "audio-card-pci"
	Ports:
		analog-output-speaker: Динамики (priority: 10000)
		analog-output-headphones: Аналоговые наушники (priority: 9000, not available)
	Active Port: analog-output-speaker
	Formats:
		pcm

Sink #1
	State: RUNNING
	Name: alsa_output.pci-0000_00_1b.0.analog-stereo.equalizer
	Description: FFT based equalizer on Встроенное аудио Аналоговый стерео
	Driver: module-equalizer-sink.c
	Sample Specification: float32le 2ch 44100Hz
	Channel Map: front-left,front-right
	Owner Module: 21
	Mute: no
	Volume: front-left: 41944 /  64%,   front-right: 41944 /  64%
	        balance 0.00
	Base Volume: 65536 / 100%
	Monitor Source: alsa_output.pci-0000_00_1b.0.analog-stereo.equalizer.monitor
	Latency: 156060 usec, configured 50024 usec
	Flags: HW_MUTE_CTRL LATENCY 
	Properties:
		device.description = "FFT based equalizer on Встроенное аудио Аналоговый стерео"
		device.master_device = "alsa_output.pci-0000_00_1b.0.analog-stereo"
		device.class = "filter"
		device.icon_name = "audio-card"
	Formats:
		pcm

So, if there isn't solution, maybe I should use OSS or try alsaequal? Then, can I disable PulseAudio, but use regular Gnome 3 volume applet?

Last edited by meyers (2016-03-15 15:31:04)

onslow77

Member

Registered: 2014-09-21

Posts: 279

Re: PulseAudio equalizer makes glitches

Hello!

I suggest you follow the Alsa troubleshooting guide and see if any of the suggested solutions there solves your problem.

Regards
Martin

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