Complete newbie... notes repeating in Presonus Studio One 5

Hi to all
I have added the MIDI Guitar 2 to my DW and the notes are clean when using the on screen keyboard, but when I use a guitar to trigger the notes, and play a slow scale, each note repeats just before the next one.
Any help would be very welcome, patronising or not…

This is related to tracking.

Make sure you have a clean/dry input signal, preferably from a solid body guitar, and tone controls all way up, and a decent audio interface.

If you use Windows the audio interface should have a ASIO driver, which has to be set up in the DAW and there shouldn’t be any yellow warning triangles in the MG user interface.