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A chug is a guttural, bass-heavy sound. It doesn’t necessarily step on the toes of the bass guitar in your mix, but it walks that fine line between the low end and the mid range. A lot of beginners and self-recording musicians want a good chug, but few are able to achieve it without a thorough understanding of common mix techniques.
You stack plugins on top of plugins in every session just as part of your normal signal chain. Some people EQ before they compress, others compress before they EQ, and for some it’ll depend on the situation. Regardless of your EQ/compression approach, have you ever considered how you mix could be improved by stacking a powerful combo of compressors on a particular track?