basic- multi feed radio recording set up suggestions

I do apologize if this has already been covered somewhere.

long story short i am looking to record, not stream live, just record audio from a single frequency on radio like a CDM 1550. my goal is to start with just one frequency they add two more.



this is for my fire department as a way to capture and play back incident audio for training and critique purposes. also, adding audio of the "big one" to our annual slide show is a nice touch. as of right now the only way for our dept to get recordings is from a dispatch center, but its only for specific reasons and has to be requested by the chief (pain in the butt).



is there anyone that is running a setup like this to accomplish a similar task? im looking for ideas or examples of setups to base mine upon. my road block is how to get the audio from the radio to the computer and how to do multiple audio inputs. i plan on using Audacity to record the audio, utilizing the programs record VOX feature.



Lastly, id like to use a laptop to do this if possible, but if thats not really a good option a desktop might be available.



Thanks in advance.

basic- multi feed radio recording set up suggestions