A limit of E-A7 is to have up to 512 samples...
I think is very short number of samples... 128 MB for Sampling/Sample Import, but just 512 samples....
http://www.rolandus.com/products/e-a7/specifications/
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Style Producer
Ketron Event, Ketron Audya 76, Audya 5, SD9, SD1,Yamaha Genos, Korg Pa3x, microarranger, Roland Fantom G6, V-Synth XT, XV-5080, SH201, D-50, Novation KS4, Dave Smith Evolver