Spark Zone

I’ve heard mention of a built in tuner. I have not figured out where or how to access that?

Look at the flashing LED on the Spark. Reference page 3 of the User Manual.

Long press of the LED and hold to access the tuner.
Not sure what happens next as I am waiting for my acoustic pickup to arrive.
Long press to exit.

I adore the Spark amp and the software to bits, I really do, but the tuner is kinda useless.
Instead I bought a digital chromatic tuner for each of my axes. They are very cheap and very easy to use. I got the Fishman FT-2 - https://www.fishman.com/portfolio/ft-2- ... tic-tuner/

Just Google it https://youtu.be/idFnQuuFZV0. A good number of the questions I see here, are all easily found on YouTube videos