I stumbled upon this nice tool - just want to share.
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SampleRobot 5.05 Pro - Whichever sampler, hardware or software, you are using - SampleRobot supports all the important single and multisample formats, such as AIFF, WAV, Soundfont2, Reason NN-XT, HALion, Kontakt, EXS24, SFZ, microSAMPLER, Volca Sample, Kronos, OP-1 etc.
- Drum sample export for Teenage Engineering's OP-1.
- Turn hardware into software or turn VST/AU instruments into samples.
…you could also try apples mainstage, it includes the auto sampler from redmatica (and much more), costs about $30. no offend to the sample robot, but i think: yes, it´s pricey.