This is the effects rack used for "Chapbook Series, Volume II" by NVE
"New Vibe Ensemble;" http://www.cdbaby.com/Artist/NewVibeEnsemble
Musser M-48 vibraphone w/K&K pickups & pre-amp going to: 1) wah wah pedal, 2) fuzz tone, 3) envelope filter, 4) vibrato, 5) Moog ring modulator, 6) rotary sound processor plugged into a Kustom rolled & pleated p a head, the details explained in the article,
"Moving Air," a look at being heard on mallet instruments.
Picture (edited to add):