Audiofront Multi midi/usb pedals/vol/expression interface 4 full piano/orchestral control!

These guys are awesome:  Audiofront
 
Available pedalboards are limited. They're made for guitarists mostly.  After an evening of searching for a solution to midi/usb conversion and how to find a multi pedal set up for pianos and orchestration, I happened upon these folks... If you want full piano pedals and multiple expression/volume/? footcontrollers for orchestrations and hands free operation, these folks have you covered, inexpensively... from their site: 
 

Reasons to use MIDI Expression

• You want hands-free control of your DAW or other music software.
• You want to use different pedals without needing to mess with any settings.
• You want to turn your pedals and footswitches into MIDI foot controllers.
• You need a compact and hassle-free pedal interface for your live performances.
• You want to give your virtual piano all the pedals found on a regular piano.
• You want to trigger velocity sensitive notes with an expression pedal.
• You want a hands-free way to audition patch changes and presets.

Check out some videos and have a look at the manual to see if MIDI Expression is right for you.
 

"Simplicity and reliability, what more do you need?" 
      -- Brad from Canada
 

Overview

MIDI Expression devices are class compliant USB MIDI pedal interfaces. Pedal sensing technology built into each device automatically loads custom presets when various types of pedals are plugged in, allowing them to support a whole range of pedals with zero fuss. This functionality is enhanced by a preset editor application that gives demanding users all the control they need and exposes powerful features that let you do more with your pedals.

Intelligent Design

Do More with your Pedals