[pulseaudio-discuss] Unable to get any audio output from module-equalizer-sink

Thu May 26 15:35:01 UTC 2016

Hello,

Manjaro 16.06
Pulseaudio 8.0

I am having trouble getting any audio output from my sound card whenever
I switch sinks via pavcountrol to 'FFT...' equalizer sink.

$ pacmd list-sinks
3 sink(s) available.
    index: 0
	name: <alsa_output.pci-0000_01_00.1.hdmi-stereo>
	driver: <module-alsa-card.c>
	flags: HARDWARE DECIBEL_VOLUME LATENCY DYNAMIC_LATENCY
	state: IDLE
	suspend cause: 
	priority: 9050
	volume: front-left: 39308 /  60% / -13.32 dB,   front-right:
39308 /  60% / -13.32 dB balance 0.00
	base volume: 65536 / 100% / 0.00 dB
	volume steps: 65537
	muted: no
	current latency: 39.79 ms
	max request: 6 KiB
	max rewind: 344 KiB
	monitor source: 0
	sample spec: s16le 2ch 44100Hz
	channel map: front-left,front-right
	             Stereo
	used by: 0
	linked by: 1
	configured latency: 40.00 ms; range is 0.50 .. 1999.82 ms
	card: 0 <alsa_card.pci-0000_01_00.1>
	module: 6
	properties:
		alsa.resolution_bits = "16"
		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 ATI HDMI"
		alsa.long_card_name = "HDA ATI HDMI at 0xfea60000 irq
41" alsa.driver_name = "snd_hda_intel"
		device.bus_path = "pci-0000:01:00.1"
		sysfs.path =
"/devices/pci0000:00/0000:00:02.1/0000:01:00.1/sound/card1" device.bus
= "pci" device.vendor.id = "1002"
		device.vendor.name = "Advanced Micro Devices, Inc.
[AMD/ATI]" device.product.id = "aab0"
		device.product.name = "Cape Verde/Pitcairn HDMI Audio
[Radeon HD 7700/7800 Series]" device.string = "hdmi:1"
		device.buffering.buffer_size = "352768"
		device.buffering.fragment_size = "176384"
		device.access_mode = "mmap+timer"
		device.profile.name = "hdmi-stereo"
		device.profile.description = "Digital Stereo (HDMI)"
		device.description = "Cape Verde/Pitcairn HDMI Audio
[Radeon HD 7700/7800 Series] Digital Stereo (HDMI)" alsa.mixer_name =
"ATI R6xx HDMI" alsa.components = "HDA:1002aa01,00aa0100,00100300"
		module-udev-detect.discovered = "1"
		device.icon_name = "audio-card-pci"
	ports:
		hdmi-output-0: HDMI / DisplayPort (priority 5900,
latency offset 0 usec, available: yes) properties:
				device.icon_name = "video-display"
	active port: <hdmi-output-0>
  * index: 1
	name: <alsa_output.pci-0000_00_14.2.analog-stereo>
	driver: <module-alsa-card.c>
	flags: HARDWARE HW_MUTE_CTRL HW_VOLUME_CTRL DECIBEL_VOLUME
LATENCY DYNAMIC_LATENCY state: RUNNING
	suspend cause: 
	priority: 9959
	volume: front-left: 45654 /  70% / -9.42 dB,   front-right:
45654 /  70% / -9.42 dB balance 0.00
	base volume: 65536 / 100% / 0.00 dB
	volume steps: 65537
	muted: no
	current latency: 39.83 ms
	max request: 6 KiB
	max rewind: 344 KiB
	monitor source: 1
	sample spec: s16le 2ch 44100Hz
	channel map: front-left,front-right
	             Stereo
	used by: 1
	linked by: 3
	configured latency: 40.00 ms; range is 0.50 .. 1999.82 ms
	card: 1 <alsa_card.pci-0000_00_14.2>
	module: 7
	properties:
		alsa.resolution_bits = "16"
		device.api = "alsa"
		device.class = "sound"
		alsa.class = "generic"
		alsa.subclass = "generic-mix"
		alsa.name = "ALC887-VD Analog"
		alsa.id = "ALC887-VD Analog"
		alsa.subdevice = "0"
		alsa.subdevice_name = "subdevice #0"
		alsa.device = "0"
		alsa.card = "0"
		alsa.card_name = "HD-Audio Generic"
		alsa.long_card_name = "HD-Audio Generic at 0xfeb00000
irq 16" alsa.driver_name = "snd_hda_intel"
		device.bus_path = "pci-0000:00:14.2"
		sysfs.path =
"/devices/pci0000:00/0000:00:14.2/sound/card0" device.bus = "pci"
		device.vendor.id = "1022"
		device.vendor.name = "Advanced Micro Devices, Inc.
[AMD]" device.product.id = "780d"
		device.product.name = "FCH Azalia Controller"
		device.form_factor = "internal"
		device.string = "front:0"
		device.buffering.buffer_size = "352768"
		device.buffering.fragment_size = "176384"
		device.access_mode = "mmap+timer"
		device.profile.name = "analog-stereo"
		device.profile.description = "Analog Stereo"
		device.description = "Built-in Audio Analog Stereo"
		alsa.mixer_name = "Realtek ALC887-VD"
		alsa.components = "HDA:10ec0887,1458a182,00100302"
		module-udev-detect.discovered = "1"
		device.icon_name = "audio-card-pci"
	ports:
		analog-output-lineout: Line Out (priority 9900, latency
offset 0 usec, available: yes) properties:

		analog-output-headphones: Headphones (priority 9000,
latency offset 0 usec, available: no) properties:
				device.icon_name = "audio-headphones"
	active port: <analog-output-lineout>
    index: 2
	name: <alsa_output.pci-0000_00_14.2.analog-stereo.equalizer>
	driver: <module-equalizer-sink.c>
	flags: HW_MUTE_CTRL LATENCY DYNAMIC_LATENCY
	state: IDLE
	suspend cause: 
	priority: 1000
	volume: front-left: 45654 /  70%,   front-right: 45654 /  70%
	        balance 0.00
	base volume: 65536 / 100%
	volume steps: 65537
	muted: no
	current latency: 71.42 ms
	max request: 62 KiB
	max rewind: 689 KiB
	monitor source: 3
	sample spec: float32le 2ch 44100Hz
	channel map: front-left,front-right
	             Stereo
	used by: 0
	linked by: 1
	configured latency: 40.00 ms; range is 0.50 .. 1999.82 ms
	module: 25
	properties:
		device.description = "FFT based equalizer on Built-in
Audio Analog Stereo" device.master_device =
"alsa_output.pci-0000_00_14.2.analog-stereo" device.class = "filter"
		device.icon_name = "audio-card"

See https://dpaste.de/hZRP for pactl list output

I see volume gain from the application and the equalizer sink in
PAVCONTROL but no audio coming out of the sound card. Am I missing
something?

I have somewhat similar situation with this person
https://bbs.archlinux.org/viewtopic.php?pid=1315907#p1315907. I will
give his solution a shot and report back.

Regards