As I see it, the Mama Bear and Aura systems depend on the same concept. They both alter the pickup's signal, through digital technology, to more closely resemble the output of a microphone. The difference being that the Mama Bear has a more generic approach and the Aura a more specific one, even going as far as offering the option of recording one's specific guitar to provide a more precise reference. Whether one chooses to call it, imaging, or, modeling, the concept is the same. They both rely on internally stored reference signals.
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