If you can export the samples to Wav format, you can make a soundfont. Another thing was that melody export a instrument directly to soundfont format. I doubt it will make, because the copyrights problems. An idea can be use Melody like a synthetizer. But melody dont use the soundbase when you input in realtime from a keyboard, because latency problems.
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Marcelo Colina Kindergarden music teacher (yeah, i work with the big ones My music Motagator