I use both a Quad Cortex and a Nano Cortex. The Nano Cortex is mainly for situations where I need to travel light. My current workflow is to build tones on the Quad Cortex and then capture them onto the Nano Cortex.
A feature that would greatly improve this workflow would be the ability to capture the Quad Cortex internally, without the need for external cables or a computer. Removing that extra setup would make the process much faster and more convenient.
Is there a technical reason why internal capturing isn’t possible today? Sorry if the question have been asked before 
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