- How do I separate groove metal from thrash?
- Tempo and accent thinking. Thrash generates pressure through dense down-picking above 160 BPM. Groove metal drops to 90–130 BPM and spends its energy on where a small number of accents land, using syncopation and rests. One is a sustained sprint; the other throws one punch at a time.
- What is a pinch harmonic, and should I name it?
- Letting the thumb brush the string as you pick brings out an upper harmonic as a piercing squeal. It is the signature ornament of a groove metal riff, and prompting for pinch-harmonic squeals at the end of riff phrases gets you that detail far more reliably than asking for aggression.
- My result is heavy but loose.
- That is almost always alignment. Write bass locked exactly to the kick, every riff accent hitting with the snare, palm-muted staccato cut short with no ring-out. The weight of this style comes from millisecond-level tightness; once the parts drift, the punch disappears.