[Pkg-alsa-devel] Bug#992780: libasound2-plugins: slow audio when plug/unplug external USB audio device
Jean-Marie Favreau
j-marie.favreau at uca.fr
Mon Aug 23 11:45:37 BST 2021
Package: libasound2-plugins
Version: 1.2.5-2
Severity: normal
Tags: upstream
Dear Maintainer,
I am using a debian testing, and tried a couple of libasound2-plugins versions (deb marillat versions, unstable version), but this bug is still present.
I am using an external USB audio device, and pulseaudio for usual audio usages (browser, player, etc).
When pulsaudio starts, everything is fine with the audio system: when a sound is played, everything is ok.
Even if I unplug the usb device, the audio file is still played in the internal sound card with a correct bitrate.
Unfortunalely, when I replug the USB audio device, the audio file is now played with a slow speed, as if the bitrate was not correctly interpreted;
I tried several settings in the /etc/pulse/daemon.conf without success: trying to change defaultt-sample-rate / alternate-sample-rate to the same value or to different values such as 44100 and 48000, using avoid-resampling=yes or not.
Here is the output of "pactl info":
Server String: /run/user/1000/pulse/native
Library Protocol Version: 34
Server Protocol Version: 34
Is Local: yes
Client Index: 9
Tile Size: 65472
User Name: jm
Host Name: L-16V52X2
Server Name: pulseaudio
Server Version: 14.2
Default Sample Specification: float32le 2ch 44100Hz
Default Channel Map: front-left,front-right
Default Sink: alsa_output.usb-PreSonus_AudioBox_22_VSL_2214-00.analog-stereo
Default Source: alsa_input.usb-PreSonus_AudioBox_22_VSL_2214-00.analog-stereo
Here is the output of "pacmd list-sinks" while the system is playing a slow speed audio (after usb unplug / plug):
2 sink(s) available.
* index: 0
name: <alsa_output.usb-PreSonus_AudioBox_22_VSL_2214-00.analog-stereo>
driver: <module-alsa-card.c>
flags: HARDWARE DECIBEL_VOLUME LATENCY DYNAMIC_LATENCY
state: SUSPENDED
suspend cause: IDLE
priority: 9049
volume: front-left: 65536 / 100% / 0,00 dB, front-right: 65536 / 100% / 0,00 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
Stéréo
used by: 0
linked by: 0
configured latency: 0,00 ms; range is 0,50 .. 2000,00 ms
card: 0 <alsa_card.usb-PreSonus_AudioBox_22_VSL_2214-00>
module: 6
properties:
alsa.resolution_bits = "32"
device.api = "alsa"
device.class = "sound"
alsa.class = "generic"
alsa.subclass = "generic-mix"
alsa.name = "USB Audio"
alsa.id = "USB Audio"
alsa.subdevice = "0"
alsa.subdevice_name = "subdevice #0"
alsa.device = "0"
alsa.card = "1"
alsa.card_name = "AudioBox 22 VSL"
alsa.long_card_name = "PreSonus AudioBox 22 VSL at usb-0000:00:14.0-2.2, high speed"
alsa.driver_name = "snd_usb_audio"
device.bus_path = "pci-0000:00:14.0-usb-0:2.2:1.0"
sysfs.path = "/devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2.2/1-2.2:1.0/sound/card1"
udev.id = "usb-PreSonus_AudioBox_22_VSL_2214-00"
device.bus = "usb"
device.vendor.id = "194f"
device.vendor.name = "PreSonus Audio Electronics, Inc."
device.product.id = "0101"
device.product.name = "AudioBox 22 VSL"
device.serial = "PreSonus_AudioBox_22_VSL_2214"
device.string = "front:1"
device.buffering.buffer_size = "705600"
device.buffering.fragment_size = "352800"
device.access_mode = "mmap+timer"
device.profile.name = "analog-stereo"
device.profile.description = "Stéréo analogique"
device.description = "AudioBox 22 VSL Stéréo analogique"
module-udev-detect.discovered = "1"
device.icon_name = "audio-card-usb"
ports:
analog-output: Analog Output (priority 9900, latency offset 0 usec, available: unknown)
properties:
active port: <analog-output>
index: 1
name: <alsa_output.pci-0000_00_1f.3.analog-stereo>
driver: <module-alsa-card.c>
flags: HARDWARE HW_MUTE_CTRL HW_VOLUME_CTRL DECIBEL_VOLUME LATENCY DYNAMIC_LATENCY
state: SUSPENDED
suspend cause: IDLE
priority: 9039
volume: front-left: 52428 / 80% / -5,81 dB, front-right: 52428 / 80% / -5,81 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: 2
sample spec: s32le 2ch 44100Hz
channel map: front-left,front-right
Stéréo
used by: 0
linked by: 0
configured latency: 0,00 ms; range is 0,50 .. 2000,00 ms
card: 1 <alsa_card.pci-0000_00_1f.3>
module: 7
properties:
alsa.resolution_bits = "32"
device.api = "alsa"
device.class = "sound"
alsa.class = "generic"
alsa.subclass = "generic-mix"
alsa.name = "ALC3246 Analog"
alsa.id = "ALC3246 Analog"
alsa.subdevice = "0"
alsa.subdevice_name = "subdevice #0"
alsa.device = "0"
alsa.card = "0"
alsa.card_name = "HDA Intel PCH"
alsa.long_card_name = "HDA Intel PCH at 0xec348000 irq 141"
alsa.driver_name = "snd_hda_intel"
device.bus_path = "pci-0000:00:1f.3"
sysfs.path = "/devices/pci0000:00/0000:00:1f.3/sound/card0"
device.bus = "pci"
device.vendor.id = "8086"
device.vendor.name = "Intel Corporation"
device.product.id = "9d71"
device.product.name = "Sunrise Point-LP HD Audio"
device.form_factor = "internal"
device.string = "front:0"
device.buffering.buffer_size = "705600"
device.buffering.fragment_size = "352800"
device.access_mode = "mmap+timer"
device.profile.name = "analog-stereo"
device.profile.description = "Stéréo analogique"
device.description = "Audio interne Stéréo analogique"
module-udev-detect.discovered = "1"
device.icon_name = "audio-card-pci"
ports:
analog-output-speaker: Speakers (priority 10000, latency offset 0 usec, available: unknown)
properties:
device.icon_name = "audio-speakers"
analog-output-headphones: Headphones (priority 9900, latency offset 0 usec, available: no)
properties:
device.icon_name = "audio-headphones"
active port: <analog-output-speaker>
*** Reporter, please consider answering these questions, where appropriate ***
* What led up to the situation?
* What exactly did you do (or not do) that was effective (or
ineffective)?
* What was the outcome of this action?
* What outcome did you expect instead?
*** End of the template - remove these template lines ***
-- System Information:
Debian Release: 11.0
APT prefers unstable
APT policy: (500, 'unstable'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 5.10.0-8-rt-amd64 (SMP w/8 CPU threads; PREEMPT)
Kernel taint flags: TAINT_WARN
Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled
Versions of packages libasound2-plugins depends on:
ii libasound2 1.2.5.1-0.0
ii libavcodec58 10:4.4-dmo4+deb11u1
ii libavutil56 10:4.4-dmo4+deb11u1
ii libc6 2.31-13
ii libjack-jackd2-0 [libjack-0.125] 1.9.17~dfsg-1
ii libpulse0 14.2-2
ii libsamplerate0 0.2.1+ds0-1
ii libswresample3 10:4.4-dmo4+deb11u1
libasound2-plugins recommends no packages.
libasound2-plugins suggests no packages.
-- no debconf information
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