Audio under-runs on dial_tone.py (even when using plughw:0, 0)

Hi,

I’m helping a mate get GNURadio 3.2 running on an Ubuntu machine. As a
quick
sanity check I run dial_tone.py and to my surprise it generates a stream
of
“aU” audio under-run warnings and clicking noises from the speaker. I’ve
used the “-O plughw:0,0” option because that’s always worked for me when
there are rate mismatches but it gives exactly the same result. The only
odd
thing I can think of is that this is running in a VM but otherwise I am
at a
loss to understand what’s happening. Anyone clues?

Many thanks,

Steve

On Mon, Jul 27, 2009 at 02:12:34PM +1000, Steve G. wrote:

Many thanks,
Steve

What kind of VM?
What’s the host OS?
Does any other audio output work in the guest?

Eric

What kind of VM?

VMware Fusion, latest version.

What’s the host OS?

OS X 10.5.7

Does any other audio output work in the guest?

All audio and video playback works fine in the VM - I can even capture
audio
using the examples but get audio under-run on output.

Thanks for helping. I’m trying to sort it out via an SSH link and am
befuddled that such a simple app plays up.

What’s the host OS?

OS X 10.5.7

I had absolutely no luck getting any kind of decent performance with
parallels or VMware when using gnuradio/ubuntu VMs under os x(10.4).
I haven’t tried tried since I got my new laptop, but if you are set on
using your mac machine as a development box then I would suggest dual
booting if it’s an intel mac or just installing gnuradio in the os x
environment.

Jason

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