[Asterisk-Users] odd 'digital' sound artifacts [1 card = no artifacts]

[Gerard Saraber]

Ok, 
after 10+ minutes of mindnumbing hold music ;) no artifacts with only
one TDM card installed, going to test with two cards on their own IRQ in
a minute again..

Feb 14 09:59:31 [kernel] Zaptel Version: SVN-trunk-r941M Echo Canceller:
MG2
Feb 14 09:59:31 [kernel] ACPI: PCI Interrupt Link [APC2] enabled at IRQ
17
Feb 14 09:59:31 [kernel] GSI 21 sharing vector 0xD9 and IRQ 21
Feb 14 09:59:31 [kernel] ACPI: PCI Interrupt 0000:02:07.0[A] -> Link
[APC2] -> GSI 17 (level, low) -> IRQ 217


           CPU0       
  0:    1026246    IO-APIC-edge  timer
  8:          0    IO-APIC-edge  rtc
  9:          0   IO-APIC-level  acpi
177:      50426   IO-APIC-level  eth0
185:       6822   IO-APIC-level  libata, NVidia CK8S
193:          0   IO-APIC-level  ehci_hcd:usb1
201:          0   IO-APIC-level  ohci_hcd:usb2
209:          0   IO-APIC-level  ohci_hcd:usb3
217:    1012971   IO-APIC-level  wctdm
NMI:        143 
LOC:    1026004 
ERR:          0
MIS:          0

> -----Original Message-----
> From: asterisk-users-bounces at lists.digium.com
> [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Gerard Saraber
> Sent: Saturday, 11 February 2006 2:04 AM
> To: Asterisk Users Mailing List - Non-Commercial Discussion
> Subject: Re: [Asterisk-Users] odd 'digital' sound artifacts
> 
> So nobody heard these before? or did I do something stupid that anyone
> should know and nobody wanted to yell at me for it ;)
> 
> On Wed, 2006-02-08 at 12:54 -0600, Gerard Saraber wrote:
> > Hi,
> > I've got some weird sound artifacts happening during calls, they're very
> > hard to describe, so I have a 122kb recording:
> > http://openprojects.rarcoa.com/~miztic/artifact.wav
> > normally the artifacts are just short blips, not quite as long as the
> > one above, but they sound the same.
> > When using the aggressive echo suppressor, it seems like those artifacts
> > cause a really loud buzzing sound to come out of the cisco phone, pretty
> > much made using the aggressive canceler impossible to use, it's too bad
> > because it worked the best out of all of them, mark3 works ok but still
> > gives echos on at least 20% of the calls.
> > 
> > I thought they might be caused by IRQ sharing, so I pulled one of the
> > TDM400P cards out and made sure the remaining two were on their own IRQ,
> > the artifacts were still there. I've also tried running a kernel with
> > all the low-latency stuff turned on, and the same kernel with it all
> > turned off (2.6.16-rc2) doesn't appear to make any difference either.
> > I'm not sure what else to try, any input would be appreciated.
> > 
> > Thanks,
> > Gerard Saraber
> > gsaraber at rarcoa.com
> > 
> > hardware:
> > AMD64 1.8Ghz 512M ram
> > MSI nforce3 socket 754 mainboard
> > 3 Digium TDM400P cards, 10 FXO + 2 FXS modules
> > 

-- 
Regards,
Gerard Saraber
Network Admin, Rarcoa, Inc.
(630) 654-2580 x11
gsaraber at rarcoa.com