Intel High Definition Audio + Skype - echoing

Norberto Meijome freebsd at
Wed Feb 28 00:04:32 UTC 2007

Hi :)
I have a Thinkpad z60m with a HDA snd card, using Ariff's drivers from 25th Feb
( THANKS for the drivers, Ariff!!:

$ cat /dev/sndstat 
FreeBSD Audio Driver (newpcm: 64bit)
Installed devices:
pcm0: <Intel 82801F High Definition Audio Controller> at memory 0xb0000000 irq
11 kld snd_hda [20070225_0040] (1p/1r/2v channels duplex default)

pciconf -lv 
pcm0 at pci0:27:0: class=0x040300 card=0x05b71014 chip=0x26688086 rev=0x03 hdr=0x00
    vendor   = 'Intel Corporation'
    device   = '82801FB/FR/FW/FRW Intel High DefiNition Audio Controller'
    class    = multimedia

I'm using Skype 1.2 from ports , skype-  . I've been using it for as
long as I've been using FreeBSD as desktop/laptop ( a year), both on a Toshiba
A2 and this Thinkpad, never a problem.

since I moved to ariff's low latency drivers, my colleagues tell me they can
hear quite a bit of echo / feedback - I've confirmed today this only happens
when both someone else and I speak at the same time. I cannot hear any kind of

this didn't use to happen with the hdac.ko driver that was around before
ariff's implementation.

The settings I'm using are :
 - all the default sysctl settings
 - $ mixer
Mixer vol      is currently set to  61:61
Mixer pcm      is currently set to  89:89
Mixer speaker  is currently set to  49:49
Mixer mic      is currently set to  89:89
Mixer cd       is currently set to  40:40
Mixer rec      is currently set to  66:66
Recording source: mic

These mixer options are the ones that allows my colleagues on a conference to
hear me ok - but they still produce some feedback when we talk over each other.

I don't think it is headset related : i have a Sennheiser tiny mic that has
only 1 ear bud (non usb), and a logitech, non usb, with big ear-mufs and mic on
the RHS - same result.

Is there anything I can do? 

thanks in advance!!!
{Beto|Norberto|Numard} Meijome

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