Yes Bachus that's the issue, they're geared toward studio not for live applications.
This is the reason I like the MJ, MJPro because of their all in one design and portability.
Well maybe in the near future we will have all software based arranger vocalizer geared for live use.
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Jim

SD90,Korg I3, KMA Liverpool,TC Helicon Play Electric, Fender Sonoran Guitar, vArranger, Bose S1 Pros, Bose L1 Compact, Aiwa Exos-9