[korethr]

I suggest turning off the distortion by default for the 1st stage of tuning with the electric tuner. The distortion can mask being slightly (+/- 5 cents) out of tune, making it hard to hear even though the tuner says it's still wrong. Additionally, in all my years of playing, I have never fed a tuner with a distorted signal from the amplifier, but a clean one; the tuner pedal is the very first item in my effects chain before the amplifier. I suspect it is easier for a tuner to pick out a(n) (in)correctly tuned note from a clean tone, as there's simply less frequencies in the FFT to sort through. It may also make it easier for users to pick out the fundamental and it's natural harmonics in the FFT.

Another suggestion is to model how the tone will go slightly sharp on the attack. How much depends on how much tension the strings are under, and thus all the things that effect that (tuned note, string tension & scale length).

[jamesb93]

You should always tune to clean. If you have any sort of distortion (particularly digital) you start to introduce aliasing and will have the pitch detection algorithm locking on to frequencies that have wrapped around the nyquist.

[notadoc]

> I suggest turning off the distortion by default for the 1st stage of tuning with the electric tuner.

Agreed.

Otherwise, great work!