A method for bioelectric physiological signal acquisition and processing including: a first signal processing operation including: /a/ acquiring a first analog signal, /b/ converting the first analog signal in a first digital signal with a first bit depth, /c/ transferring the first digital signal with the first bit depth to a microprocessor; upon reception of a signal to switch from a first operating mode to a second operating mode, a second signal processing operation including: /e/ acquiring a second analog signal, /f/ converting the second analog signal in a second digital signal with a first bit depth, /g/ converting the second digital signal with the first bit depth to a converted second digital signal with a second bit depth, /h/ transferring the converted second digital signal to the microprocessor, and /i/ processing the transferred signal on the microprocessor.