I'm playing with an RTL-SDR dongle and an LNA, on Linux Mint with GQRX and DSD A lot of frequencies show digital transmissions, which the DSD is not converting. I don't whether it is a format DSD cannot convert, encrypted, or just distorted.
Is there a site were I can listen to how different digital transmission formats (DMR, D-Star, etc.) sound without converting, or any other strange transmissions?