hi sorry for the strange format... I can easly see it with quick time. anyway
http://www.youtube.com/watch?v=-ickw5EsPCk here you can see the video if you're interesting.
Yes the yamaha kind of filters not affecting the principal note can give good results in bass sounds but even in acoustic tipe of sound where you can add easly resonance without affecting the fundamental... I'll try to make some more experiment on this.
Regards, Lorenzo