[LAU] automated recording / processing / encoding to mp3

LAUsers: I am trying to set up a box in a sound booth to take in a mono analog speech signal off of a board and then eventually output a id3 tagged mp3. * easy to for myself and the other (non linux user) sound team members. * be capable of capturing for <= 2 hours. * simple id3 tagging (allow user to set the speaker and the title ) * apply compressor, remove DC offset, and normalize. * encode as mp3 with reasonable quality for a voice recording (any suggestions here?) My first thought for capturing the signal was Ardour (of course), but now I'm thinking that may be overkill. It may be best to have the whole thing be basically a script. to that end, * a good command line DAW? * minimum hardware for the computer / sound card? * anyone built a similar automated chain? * any other suggestions? thanks. /brian