Re: [Discuss-gnuradio] gqrx branch osmosdr

[Alexandru Csete]

On Tue, Jun 5, 2012 at 6:51 PM, Patrick Strasser
<address@hidden> wrote:
> Alexandru Csete wrote on 2012-06-05 16:36:
>> On Tue, Jun 5, 2012 at 4:02 PM, Patrick Strasser
>>> v2.1-git-61-g7bf22e9
>>>
>>> Built fine, but I could not get it running.
>>
>> Thanks for the feedback. It was a lack of check in gqrx. You can try
>> to pull & build again.
>
> Much better. The device selection dialog is nice. Works now.
>
> Again, could crash it:
> I started gqrx, run the receiver.
> When opening the device selection dialog again and selecting the same
> device with a different sampling rate, the program quits, command line
> output says:

Yes, I know about this problem.


>
> In comparison to the rtlsdr fork I see you added FM-W. FM-N in
> comparison sounds more clipped, FM-W is clipped with a narrow filter,
> but noisy with a wide filter. With a filter that has no clipping, noise
> is clearly audible. I'm not sure if this is bound by the low dynamic
> sampling range (8 bit) in combination with big bandwith which means a
> lot more noise energy with wide filters. Anyway, gqrx gets greater every
> time!

There is no audio filter yet (except de-emphasis) so you get pretty
much 48 kHz worth of noise, including stereo pilot tone and whatever
crap they include in a broadcast FM channel these days.

Alex