I've got SDRplay working reasonably well with GNUradio, allowing me to create some receivers for reception of FM radio and also narrowband FM and AM transmissions.
I suggest trying this first with the gr-osmosdr installation instructions available in the Downloads section
http://sdrplay.com/downloads.html . If you run into problems, see my post
http://sdrplay.com/community/viewtopic. ... t=123#p484 describing some changes I made to SDRplay source code in gr-osmosdr that seemed to help.
These receivers run in GNUradio companion. I'm posting them as a starting point for those interested to play with and improve.
Wideband FM Receiver:
GRC flow graph (text) at:
http://www.transmitter.com/sdrplay/sdrp ... 21.grc.txt
Narrowband FM and AM receiver (full frequency range):
GRC flow graph (text) at:
http://www.transmitter.com/sdrplay/sdrp ... 21.grc.txt
Some tips and observations when using these receivers:
1) DC removal and IQ balance change with gain changes. Play around with the RF Gain control to find the sweet spot looking at the RF FFT displays.
2) Changing RF gain is likely to result in buffer underflows. Not sure why this is happening. It seems to be more of a problem on the WBFM receiver.
3) Changing baseband and IF gain in the gr-osmocom source block appears to have no effect on the SDRplay.
4) Yes, you may hear some "static" on the output. I haven't put any filters after the demodulator. They might help.
5) The SDRplay has excellent performance -- equal to the other SDR's I've tested here on known weak signals.
6) If you don't like the defaults or layout, it is easy to change them in the flow graph.
7) When adding or changing blocks, keep the sampling rate in mind. These receivers are based on a 2.048 Mbps sampling rate and changing that will require modifying the other blocks to end up with a 48 kHz audio sampling rate on the output. The major problem with GQRX not working appears to be the SDRplay code not sending a valid sampling rates to GQRX, as evidenced by the blank Sample Rate box.
Let me know how these work for you and please post your improvements and enhancements!
UPDATE:
-- Removed the rational resampler before the WBFM receiver and that solved several problems, including static on WBFM signals. Also added a filter on the audio output for good measure. Flow graph image (above) and link updated. Note that the WBFM PLL stereo receiver will work, but it is noisy. This is a known problem with that block. Search for Marcus Leech's comments on the WBFM PLL. He has a better way to do it. Adding his stereo demod is on the to-do list.
--- Yes, the user interface on both of these is horrible. My first goal was getting it working. As I find some time I'll dress them up. One complication is avoiding the DC carrier. Right now you have to do that manually by selecting a center frequency removed from the desired signal(s) and then using the offset tuning to tune in the station. I'm sure that can be fixed with some simple arithmetic, just need to figure out the best way to do it while still providing a "wide" spectrum view.
73...
...Doug AH6DL