Re: [Discuss-gnuradio] WBFM decoding flowgraph: Audio terminates when tuning

[matthew venn]

Hi Brian and Adrian, thanks for the help.

we've finally gotten around to having another go with gnuradio.

Brian, I tried your settings and we have the same situation. Things work fine until we adjust the tuning, then something happens. There is still some crackling from the speakers, but

we can never get the sound back, even if we retune to exactly where we started.

Attached is the new patch, and the errors that get printed when we tune.

One thing that has changed is there is no aU errors anymore.

Regarding hardware, it's the LimeSDR. My PC is 6 core 3ghz FX6100 with 8gb ram. It hits 50% on one core with gnuradio companion running. When tuning I don't notice a difference.

Thanks!

Matt

On 16 February 2018 at 22:42, Adrian Musceac <address@hidden> wrote:

Hi,
Based on your graph, the filter seems to be running at the same sample rate as the source, even though you have a decimator block ahead of it.
I suggest to correct that and then try again.

Cheers,
Adrian

On February 16, 2018 8:42:13 PM UTC, matthew venn <address@hidden> wrote:

Hi all,

I've got a limesdr that I'm using to learn about SDR. I started with the AM tutorial from the website and have now moved on to something that I can pickup with an antenna.

The flow works, until I tune it. Then I get aU on the log, and the audio changes (it still makes noise), but I can never get the audio back even if I retune to exactly where it was.

I can use the waterfall to find a new frequency, then stop the flow, type that new number as the default tuning and then start and hear audio again. Until I tune...

Any idea why it breaks the audio when I tune it?

Thanks,

Matt

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Matthew Venn
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