Zuki,
the VA7 has a couple of audio-ins, but they work only for musical instruments (like a guitar or another keyboard); I think that the line out of a recorder has too low a voltage to get a proper volume level.
Anyway, all you need is an adapter; then you just plug in your recorder and listen to the result.
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Korg Kronos 61 and PA3X-Pro76, Roland G-70, BK7-m and Integra 7, Casio PX-5S, Fender Stratocaster with Fralin pickups, Fender Stratocaster with Kinman pickups, vintage Gibson SG standard.