Arch Linux

lkrasner

Member

Registered: 2014-07-15

Posts: 1

Volume Randomly Increasing

During music playback (confirmed with pithos and clementine so far) my volume will randomly increase by a noticeable amount for around 10-30 seconds, then fall back to normal. No mixer sliders change, just the sound I am actually hearing.  I have no idea what logs to even look at for this.

lsmod |grep snd
snd_usb_audio         135316  1 
snd_usbmidi_lib        27484  1 snd_usb_audio
snd_rawmidi            26806  1 snd_usbmidi_lib
snd_seq_device         13132  1 snd_rawmidi
snd_hda_codec_analog    13795  1 
snd_hda_codec_generic    63126  1 snd_hda_codec_analog
snd_hda_intel          26327  4 
snd_hda_controller     26727  1 snd_hda_intel
snd_hda_codec         108552  4 snd_hda_codec_generic,snd_hda_intel,snd_hda_controller,snd_hda_codec_analog
snd_hwdep              17244  2 snd_usb_audio,snd_hda_codec
snd_pcm                88487  5 snd_usb_audio,snd_hda_codec,snd_hda_intel,snd_hda_controller
snd_timer              26614  1 snd_pcm
snd                    69340  20 snd_usb_audio,snd_hwdep,snd_timer,snd_pcm,snd_rawmidi,snd_hda_codec_generic,snd_usbmidi_lib,snd_hda_codec,snd_hda_intel,snd_seq_device,snd_hda_codec_analog
soundcore              13031  2 snd,snd_hda_codec
usbcore               199328  15 uas,btusb,usblp,uhci_hcd,snd_usb_audio,uvcvideo,usb_storage,snd_usbmidi_lib,ehci_hcd,ehci_pci,usbhid,cdc_acm

pacman -Qs alsa
local/alsa-lib 1.0.28-1
    An alternative implementation of Linux sound support
local/alsa-plugins 1.0.28-1
    Extra alsa plugins
local/pulseaudio-alsa 2-3
    ALSA Configuration for PulseAudio

pacman -Qs pulseaudio
local/libcanberra-pulse 0.30-4
    PulseAudio plugin for libcanberra
local/pamixer 1.1-4
    Pulseaudio command-line mixer like amixer
local/pavucontrol 2.0-2
    A GTK volume control for PulseAudio
local/pulseaudio 5.0-1
    A featureful, general-purpose sound server
local/pulseaudio-alsa 2-3
    ALSA Configuration for PulseAudio

emeres

Member

Registered: 2013-10-08

Posts: 1,570

Re: Volume Randomly Increasing

Does pulseaudio use a normalizer? Do you use any ladspa plugins or similar? Please post 'amixer' output for the relevant sound card. I assume you tried flat-volumes already and it did not work. You post no information on your hardware, which seems to include a usb sound card.

aplay -lL; lspci -nn | grep -i audio; lsusb