Looking for sustenuto on M-audio Hammer 88


i just bought M-Audio Hammer 88 to have a real piano feel. Now (after i have it for some time) i found out sustenuto function on pianos and i would really love to play it. Please, does anyone know how/if to play sustenuto on M-Audio Hammer? There is Sustain pedal inpout, FS2 (soft pedal) and Extension input. I would rather have sustenuto than soft.

Thank you!!!
1 person has
this question