RB can interpret them.
The melody wave is probably better because the synth in the notation program. Change the synth in RB to something better than the awful wave table.
I assume your song is a complete score in the notation program.
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John
ESI Gigaport HD+
Lenovo Turion II /4 Gig Ram/ Win7x64 be
15.6" Monitor
"The only Band is a Real Band"
www.wintertexaninfo.com/BANDS/JohnnyD.php