In different guitar tunings the different strings have different tonal values, so to play the same tone, a guitarist has to press different strings at different frets. This is equivalent to pressing different keys on a computer keyboard to create the same letter. Playing a song well means that you don't have time to think and search for the appropriate string and fret to press, but have to play automatically. Yet guitarists can master and switch between different tunings.

If a guitarist can do this, a typist can do this as well.

In different guitar tunings the different strings have different tonal values, so to play the same tone, a guitarist has to press different strings at different frets. This is equivalent to pressing different keys on a computer keyboard to create the same letter. Playing a song well means that you don't have time to think and search for the appropriate string and fret to press, but have to play automatically. Yet guitarists can master and switch between different tunings.

If a guitarist can do this, a typist can do this as well.

There are other activities where different "codes" are "uttered" by the same anatomy, e.g. dancing different dances with the same legs, or speaking different languages with the same larynx, lips and tongue. Once you have internalized one system (one dance, one tuning, one language, one keyboard layout) and performing it has become automatic, you no longer "stumble" or "speak pidgin".