Boss VF-1 Effect Processor

Hi again,
Thanks for the responses!  The way I've been auditioning the VF-1 is 
like this:  guitar into front (Hi-Z) input of the VF1 > mono (L) out 
of VF1 into the guitar input of my midi tone generator (a Yamaha 
MU100R).  The only reason to connect it to the MU100R is because it 
has a headphone out jack.  (I turned off all of the effects 
processing, etc. of the MU100R).  I also tried the VF1 into a small 
desktop stereo system (a high quality Sansui boombox). Finally, I 
tried it with a guitar amp using both the regular input and the Power 
Amp input (like an effects return).  It sounded pretty much the same 
no matter how I tried it.  I did experiment with the Output Select, 
but Line seems like the only acceptable option for the first two 
setups (into MU100R or stereo).  Incidentally, the 1st setup I 
described works great with my old SE70.
Bert