I can see a confusion arising by mixing up 'clean' tone and 'pristine' tone. (As Frus mentioned Pink Floyd) David Gilmour has a habit of really overdriving his guitar but not letting it get fizzy. The sound is EQ'd to remove much of the high-freq hash, and his technique eliminates the slop that can cause casual inter-modulation distortion. The end result is a round tone with lots of sustain and harmonic interest, but not much of debris that can accompany high distortion. So it 'sounds' like a pretty clean electric guitar and it fits the aural mold of a "clean guitar with FX".
[just typing out loud] And if IMD is kept to a minimum, the way a freq-domain effect (like chorus) gets distorted is similar to the way it sounds other way 'round. There could be some confusion between recordings made either way. Maybe we should be talking about the way FX sound on clean and messy guitar tones instead of clean and distorted [/just typing out loud].
[just typing out loud] And if IMD is kept to a minimum, the way a freq-domain effect (like chorus) gets distorted is similar to the way it sounds other way 'round. There could be some confusion between recordings made either way. Maybe we should be talking about the way FX sound on clean and messy guitar tones instead of clean and distorted [/just typing out loud].
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