1) get the command line stuff to work better
2) variband equalizer:

   y= log(x)/log(22000)*N
    N : the amount of bands
	
	perhaps you'll need to invert it 

Other CODECs for aRts:
1) MIDI/timidity for transparent high-quality MID files
2) SMPEG
3) SPC
4) NSF (requires multi-track files)
5) libmpeg3
6) rename addFile() to play() in class Playlist and the DCOP interface.