recursive dirs

I installed the moc player in a linux box and have a quastion:

In my linux, I have created a dir called sounds, with several sub-dirs (one for each group of musics), bacause I have a lot o mp3.
The question is: when I want to play some mp3 files, I need to enter the sub-dir and play them. As soon as the play stops, after the last file, I have to selet another sub-dir to continue to play.
Is there any way to make this automatic, with random selection of any of the all files in all sub-dirs, like mp3blaster?

Thanks to all