I want to ask how can I put my own recorded sound in reason 3.0?
or is there some way how to record in reason instantly?

Reason can't record any inputs, you would have to record with anotehr problem then import (.wav or aiff) into one of reason's samplers.

Or you can rewire with a DAW that can record and use reason and that Daw in sync.

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You can do this LIVE but not record, using the rebirth engine I think.

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