Hey, thanks for trying it out! Instead of estimating pitch (except for detection) it generates an internal reference and shows the difference between that and t

Hey, thanks for trying it out! Instead of estimating pitch (except for detection) it generates an internal reference and shows the difference between that and the input signal. There's also filtering to get the separate octave bands. Not sure why it wouldn't work for the low E string. Does it lock onto the correct note? If it doesn't you can manually set the desired pitch by clicking on the note display and selecting E. Also, there is a gain setting in preferences, might be that the signal is too weak for the display.