i will try to clarify...
the signal is a biosignal - an amplified EMG. At the moment it is coming straight from an inst. amp. Its frequency is very low so Arduino's limitations in terms of sampling etc. should not be a problem.
the digital monitor that I meant was just the fact that you can monitor what is happening with the signal output on serial monitor. Here I am referring to some of the analog tutorials.
The signal will be processed to extract certain features, lets say I implement a low pass filter (that's my start anyway) to smooth out my input, how can I view the result?
I hope this helps, I am at the very start of this