I believe you can set one button up for "hold for tuner" I used a FCB1010 and a Eureaka prom so I don't know how to do it but sure it can be done... I think the midi map is in the utility section on the 11r or you could google it I'll try...
http://akmedia.digidesign.com/support/docs/Eleven_Rack_User_Guide_v90x_71670.pdf page 123
and here is a thread on muting it...
http://www.elevenrackpresets.com/forum/ubbthreads.php?ubb=showflat&Number=14199
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