audio input not working with network connection

[commoceanmotion]

Howdy-

I am using Ubuntu (Studio) 10.04 (kernel name reads "2.6.32-25-preempt"), and I am having a problem with applications that send audio over network connections (skype, google voice, etc.)- the audio that comes out on the other line sounds like small periodic blips. I figure this must be some kind of clocking mismatch or something?

- I can record audio just fine using audacity or other recording interfaces.
- All forms of audio output, including skype and google voice, work just fine (I can hear the person on the other line, but they can't hear me).

Does anybody know how to adjust whatever settings I need to make this work?

Thanks for reading.

here is my soundcard from lshw:
*-multimedia
description: Audio device
product: SBx00 Azalia (Intel HDA)
vendor: ATI Technologies Inc
physical id: 14.2
bus info: (had to delete this)
version: 00
width: 64 bits
clock: 33MHz
capabilities: bus_master cap_list
configuration: driver=HDA Intel latency=32
resources: irq:16 memory:fe024000-fe027fff

and my network interface:
*-network
description: Ethernet interface
product: RTL8111/8168B PCI Express Gigabit Ethernet controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: (had to delete this)
logical name: eth0
version: 02
width: 64 bits
clock: 33MHz
capabilities: bus_master cap_list rom ethernet physical
configuration: broadcast=yes driver=r8169 driverversion=2.3LK-NAPI ip= (had to delete this) latency=0 multicast=yes
resources: irq:29 ioport:de00(size=256) memory:fddff000-fddfffff(prefetchable) memory:fdde0000-fddeffff(prefetchable) memory:fdd00000-fdd0ffff(prefetchable)

[commoceanmotion]

looks grim... anybody know of any relevant configuration files?