Arch Linux

gm112

Member

Registered: 2011-09-25

Posts: 21

Pulseaudio pitch-shifting??

Hey guys, I got a bit of an odd issue here and I need a little help figuring it out. So I just reinstalled ArchLinux and I've noticed that I have two problems: 1) Skype randomly has sound corruption(gargling, etc).. 2) The sound pitch likes to shift to a higher pitch system-wide.

There's nothing particularly interesting about my setup besides having flat-volumes turned off. Though, I did manage to pick up the following in my dmesg.

[    5.642727] 2:3:3: cannot set freq 32000 to ep 0x86
[    6.643712] 2:3:4: cannot set freq 48000 to ep 0x86

lspci results

[jon@gm112 aacs]$ lspci | grep Audio
00:1b.0 Audio device: Intel Corporation 7 Series/C210 Series Chipset Family High Definition Audio Controller (rev 04)
01:00.1 Audio device: NVIDIA Corporation Device 0e0b (rev a1)

lsmod results

[jon@gm112 aacs]$ lsmod | grep snd
snd_hda_codec_hdmi     29298  1 
snd_usb_audio         112569  1 
snd_usbmidi_lib        18931  1 snd_usb_audio
snd_rawmidi            18742  1 snd_usbmidi_lib
snd_seq_device          5180  1 snd_rawmidi
snd_hda_codec_realtek    30893  1 
snd_hda_intel          35816  7 
snd_hda_codec         145704  3 snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_intel
snd_hwdep               6364  2 snd_usb_audio,snd_hda_codec
snd_pcm                76860  5 snd_usb_audio,snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel
snd_page_alloc          7330  2 snd_pcm,snd_hda_intel
snd_timer              18687  1 snd_pcm
snd                    58893  26 snd_hda_codec_realtek,snd_usb_audio,snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_pcm,snd_rawmidi,snd_usbmidi_lib,snd_hda_codec,snd_hda_intel,snd_seq_device
soundcore               5418  1 snd
usbcore               177027  8 snd_usb_audio,uvcvideo,usb_storage,snd_usbmidi_lib,ehci_hcd,ehci_pci,usbhid,xhci_hcd

Any thoughts?

jakobcreutzfeldt

Member

Registered: 2011-05-12

Posts: 1,042

Re: Pulseaudio pitch-shifting??

Sounds like a sampling-rate problem.

What's the output of

$ grep sample-rate /etc/pulse/daemon.conf

gm112

Member

Registered: 2011-09-25

Posts: 21

Re: Pulseaudio pitch-shifting??

Sounds like a sampling-rate problem.

What's the output of

$ grep sample-rate /etc/pulse/daemon.conf

[jon@gm112 ~]$ grep sample-rate /etc/pulse/daemon.conf
; default-sample-rate = 44100
; alternate-sample-rate = 48000

Hrm.. I'll try uncommenting these. We'll see what happens. Thanks for your suggestion!

EDIT: Nope, still happens. :S Doing

pulseaudio -k && pulseaudio --start

fixes it.

EDIT #2: Well it's definitely a sample rate issue.. now just to figure out how to prevent Skype from increasing the sample rate. Kind of weird why Skype's even allowed to do that system-wide??

Last edited by gm112 (2013-05-25 07:06:45)

Rasi

Member

From: Germany

Registered: 2007-08-14

Posts: 1,914

Website

Re: Pulseaudio pitch-shifting??

**edit*** shoot me, just woke up and havent seen the date....

pulse will use the samplerate of the ONLY application running. all applications playing sound while the first one is still active will use the same samplerate. thats the only way to have mixing of multiple applications.
disable the alternative samplerate in /etc/pulse/daemon.conf *should* fix this.

Last edited by Rasi (2015-10-04 07:22:34)

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