So you’ve got a recorded guitar that’s already got an amp sound and you want to beef it up, but you don’t want to add any more overdrive or distortion. Amp-simulating plugins aren’t what you need, but the JJP guitars plugin from Waves might be what you’re looking for. With genre-specific variations on the theme of each preset, it uses different effects processed in parallel with and blended with the original single to enhance the original recording.