The "sound" of a Spanish guitar comes from how it's played. Apply these techniques to your MIDI:
With multi-gigabyte Kontakt libraries available, why stick with the humble SF2 format? spanish guitar soundfont
A specifically targets the sonic characteristics of a nylon-string guitar played with techniques common to Spanish music: The "sound" of a Spanish guitar comes from how it's played
Here is the twist: the “Spanish guitar soundfont” has outlived its original purpose. No one serious about orchestration uses a default GM (General MIDI) guitar for a film score. Instead, the soundfont has found a second life in : lo-fi hip-hop, chiptune, vaporwave, and haunted PS1-style horror games. spanish guitar soundfont
Known for a rich, melodic sound with long sustain and deep resonance.