They are titled ambient "guitara" because "guitara" is the word Karl used. At first I thought it may have referred to one or more of his unique home-built/modified instruments (he has some amazing ones), but I think instead it was just the fun of using an archaic plural.
*Something about us musicians, we often like to list what we used to create our compositions. All of these "commentary" files have that as a feature. I guess we're total gear-heads at heart. Karl listed the following on his bandcamp page for the original piece:
1st section bowed acoustic guitar. 2nd section processed electric guitar and six string bass with synths. 3rd section e-bowed electric guitar, six string bass and synths Novemmber 2022
Piece website:
Brad Garton
April, 2026