When I record my songs (with vocals) on the mp3 in the PA800 can I take it to the computer via pen drive and mix? What program would anyone suggest?

Thanks in advance.

Will post as soon as this is done!
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Yamaha 920 / Yamaha DGX-670 / Maui 5 Go (2) / Senn e935 / Sony C80 / Tascam DP24sd / ATEM Mini Pro switcher (studio)