I am trying to record audio that is from a two way radio, which is equipped with a d-sub 15 pin accessory connector. I know pin-2 outputs analog audio.

Service Manual for Radio With Pin Description http://www.vertexradiogroup.org/folders/vx-4500/VX-4500_4600_UHF_SM_USA_EXP_EU_EC093U90B.pdf

Still putting my research together but looking to be pointed in the right direction