Are you looking for an introduction into "Software Defined Radio", especially together with Linux?
Recording of a talk for the Tokyo Linux Users Group, I'm introducing the basic concepts, and software gprx and OpenWebRX+.
Might also contain segways into #HAMradio . 馃槂
Recording: https://www.youtube.com/watch?v=tvnhf_a3ztM
Slides: https://fluxcoil.net/files/presentations/20260124_tlug_sdr_introduction.pdf