dsd VS op25

https://github.com/szechyjs/dsd this will decode Dstar, I haven't used it for many years but it did work on my computer.

DSD: https://github.com/szechyjs/dsd

I have searched DSD only, but it can't stream audio to Icecast server.

I use DSD.

https://github.com/szechyjs/dsd/wiki/Installation Just install it from the repository. sudo apt-get install dsd

there is native DSD implementation https://github.com/szechyjs/dsd

For DSD, this one is the most likely project I found. I don't have time to track down the prereqs right now, but if that's the project you're looking at, the Makefile would be generated by CMake, and I'd hope that an up-to-date version of CMake would output a Makefile with appropriate CFLAGS for the version of compiler.

One of the earliest tools was Digital Speech Decoder, however it might be a bit CPU-intensive for raspberry pi.

looks like it may not be able to do what I want it to do according to this. https://github.com/boatbod/op25/issues/184

I have no experience with DMR myself, but my understanding is that the Boatbod fork of OP25 has experimental DMR support, and I believe SDRTrunk software does, too.

Using OP25[1] with RTL-SDR dongles to implement scanners for trunking P25 radio systems on a computer. And as a sidebar to that, listening in on geographically remote public safety radio systems using Broadcastify[2]. It's basically the old "radio scanner" culture, but taken online and distributed worldwide. People listen to all sorts of stuff, but given my background as a former firefighter and former 911 dispatcher, my main interest is listening to public safety dispatch stuff.

That said, another commenter below mentioned modern "phreaking" and how it's become more radio centric... and while I won't admit to doing anything illegal, let's just say that there's some interesting stuff you can do / look at / listen to these days, especially with ubiquitous and inexpensive SDR hardware and related resources. See the recent story about the KrakenSDR passive radar stuff, and some of the papers that are out there about P25 security flaws, some of the automobile hacking stuff that's RF based, etc., etc. There's a fascinating world out there buzzing around on invisible electromagnetic fields... and you can tap into it with a $30 dongle and a Raspberry Pi (or your PC).

[1]: https://github.com/boatbod/op25

If it's P25 Phase I or Phase II then SDRTrunk might work. boatbod's op25 might be another option, but more complicated to set up.

I don't have a full guide for you, but I use https://github.com/boatbod/op25 for receiving and decoding P25 Phase 1 digital signals on the command line.

op25

If you are handy with Linux you can use an RTL-SDR and OP25 on a Raspberry Pi or really any PC. This is the page for the Fairfax trunked system https://www.radioreference.com/apps/db/?sid=6957. Any talkgroup with mode D can be listened to, mode DE is encrypted. If you want I already have config files made up for the police dispatch and fire/ems dispatch channels.