HOW TO USE AN RTL KEY , HDSDR , VB HIFI CABLE AND SDR SPY FOR A FULL RDS FM DECODER
Having already installed the software HDSDR for the RTL Key , you can add VB Cable and SDR SPY to build a full RDS FM Decoder .
This are the link where you can download all what is needed :
1) HDSDR : https://www.hdsdr.de/
2) VB Audio HIFI Cable :
3) RDS SPY : http://www.rdsspy.com/
Following some picture of the settings ( I think I will make a video about )