I need a command line program to concatenate wav and or mp3 files. I have one wav file, and one mp3 file. In the end I want to have one mp3, so I will have to do some converting first before I can ...

i have 3 .mp3 files that need to be joined together into one big mp3 file. is there an easy way to do this? if needed, i can convert the mp3's to wav and then join the wav files together, makes no ...