Re: [Discuss-gnuradio] audio underrun when bad signal quality

[Marcus Müller]

Hi Markus,

nice to be hearing from you!

I'm making assumptions about your RX flow graph here:

osmocom source --> squelch of some sort --> FM demod/ AM demod of sorts
--> Audio sink

If the squelch is set to stop the flow of samples as long as there's not
enough signal, then downstream, the audio sink doesn't get any samples,
though it always needs the same amount of samples per second. Hence,
Underflows.

Hopefully, that explains the issues you're having; if not, please
explain your receiver in a little more detail,

Best regards,
Marcus

On 22.09.2015 18:34, Markus Heller wrote:
> Hi,
>
> playing around with my RTLSDR stick (RTL2832U / Rafael Micro R820T
> tuner) I observed that whenever the reception (signal quality) is bad, I
> am getting Audio Underruns and glitches in the accoustics. 
>
> How can that happen? I always thought the sample rate was constant? When
> designing the sketch I took good care that the sample rates were fine.
> Whenever I get good signal quality I have no underruns at all. 
>
> Thanks in advance,
>
> br
> markus
>
>
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