Here's the most impressive results I've seen for automated guitar transcription:

High-resolution guitar transcription via domain adaptation

Demo Videos: https://xavriley.github.io/HighResolutionGuitarTranscription... Paper: https://arxiv.org/abs/2402.15258

> We propose the use of a high-resolution piano transcription model to train a new guitar transcription model. The resulting model obtains state-of-the-art transcription results on GuitarSet in a zero-shot context, improving on previously published methods.