The guitar on Angry Mountain sounds very distorted.....could be partially an MP3 issue, however, the rest of the music sounds pretty clear. Sounds like it's just extremely bassy and has a huge volume swing happening during the muted parts which equals >> speakers farting at me! Much of it does sound pretty good though. I'm listening on smallish speakers at work so I can't give a very critical listen, however most metal still sounds really good on these speakers.
I may need to respectfully bow out of this discussion, as most people tend to have a drastically different opinion of what death metal or just plain heavy metal guitar should sound like compared to me...
I think that a killer tone comes from the focused midrange growl of a high quality amp and that a bassy, fuzzed-out, gravelly blur is absolutely
wrong for metal! This in itself may exclude me from many conversations on guitar tone....however - I've known many people that have just shit themselves over the guitar tone on certain albums but they don't grasp that it was achieved with an entirely different philosophy than what they are employing. I will be the first to say that the kind of tone I would want to record with is nothing like what I would expect to use live, at least not the sound of the amp on it's own. But the tone you go for on the amp and the sound of the overall mix are two different things. A seemingly "weak" tone to most people's ears usually will yield much better results when recorded and layered.
In short, I could rant all day about guitar tone but it never gets me anywhere so I'll save it
(for my idea of guitar perfection....listen to the opening bars of "The Masters Apprentice" by Opeth - polar opposite of the fuzzy/ muddy approach but it is devestatingly heavy

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