I successfully managed to get a wide band FM receiver up and running using the Hama Nano RTL2832U based DVB-T receiver. The complete system was tested on a virtual LUBUNTU system running inside VirtualBox (running on top of a Windows 7 host system)
There are many examples of working widenband FM receivers using USRP. But I was never able to find a working example of a flowchart using the RTL2832U chipset.
At first I experienced some issues using the RTL2832U Source Block. Whatever I configured inside GRC, the output remained very distorted. But eventually I managed to get clear audio.
Below, you can find a working flow chart (correction => sample rate must be set to 2.4 msps):
After changing the RTL2832U source block with the OsmoSDR source block, the annoying distortions disappeared. It seems there is something wrong with the RTL2832U source block (?)