Digitone Input Signal / Send FX - Fulll AD/DA conversion?

Hi there

I have a question relating to the conversion of the parts of an input stereo signal in the context of FX Send .

Are Input signals for FX processing always sent completely through the Digitone AD/DA Converter, or only the portion of the analog input signal of the send effect (?) . I just want to avoid that the complete Input signal will be converted by the digitone converters.