Public bug reported:
Binary package hint: pulseaudio
Using
pactl load-module module-loopback
I can route the mic input through output. However, the audio that comes out is
about half a second behind the audio coming in. This is okay for some things,
but for others, like musical instruments, game consoles, etc., the lag makes it
pretty much unusable for these uses.
Back in alsa this used to work fine without lag.
ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: pulseaudio 1:0.9.22~0.9.21+stable-queue-32-g8478-0ubuntu14
ProcVersionSignature: Ubuntu 2.6.32-19.28-generic 2.6.32.10+drm33.1
Uname: Linux 2.6.32-19-generic x86_64
NonfreeKernelModules: nls_iso8859_1 nls_cp437 btrfs zlib_deflate crc32c
libcrc32c ufs qnx4 hfsplus hfs minix ntfs vfat msdos fat jfs xfs exportfs
reiserfs pata_jmicron acpiphp michael_mic arc4 hidp rfcomm binfmt_misc sco
bridge stp bnep l2cap vboxnetadp vboxnetflt dm_crypt snd_hda_codec_idt
snd_hda_codec_intelhdmi snd_hda_intel snd_hda_codec snd_hwdep snd_pcm_oss
snd_mixer_oss snd_pcm snd_seq_dummy snd_seq_oss snd_seq_midi vboxdrv
snd_rawmidi joydev snd_seq_midi_event lp snd_seq snd_timer snd_seq_device
lib80211_crypt_tkip snd parport soundcore wl dell_wmi btusb psmouse dell_laptop
dcdbas ricoh_mmc snd_page_alloc lib80211 sdhci_pci sdhci led_class serio_raw
bluetooth dm_raid45 xor fbcon tileblit font bitblit softcursor vga16fb vgastate
usbhid hid i915 drm_kms_helper ohci1394 drm i2c_algo_bit ieee1394 sky2
intel_agp ahci video output
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
Subdevices: 0/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: matthew 10508 F.... pulseaudio
/dev/snd/pcmC0D0c: matthew 10508 F...m pulseaudio
/dev/snd/pcmC0D0p: matthew 10508 F...m pulseaudio
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xfe9fc000 irq 21'
Mixer name : 'SigmaTel STAC9228'
Components : 'HDA:14f12c06,14f1000f,00100000
HDA:10951392,1028022f,00100000 HDA:83847616,1028022f,00100402'
Controls : 23
Simple ctrls : 12
Date: Sun Apr 18 21:42:33 2010
InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Beta amd64 (20100318)
ProcEnviron:
LANG=en_US.utf8
SHELL=/bin/bash
SourcePackage: pulseaudio
dmi.bios.date: 03/10/2008
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A11
dmi.board.name: 0U990C
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvrA11:bd03/10/2008:svnDellInc.:pnInspiron1525:pvr:rvnDellInc.:rn0U990C:rvr:cvnDellInc.:ct8:cvr:
dmi.product.name: Inspiron 1525
dmi.sys.vendor: Dell Inc.
** Affects: pulseaudio (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug lucid
--
Lag when using module-loopback
https://bugs.launchpad.net/bugs/566381
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