Create singable melodies on the guitar or synth. Even without lyrics, a strong motif gives the listener something to hold onto.
A slow, grinding "sludge" tempo or a driving, repetitive beat can evoke the feeling of something being hammered in. 2. Composition Strategies Rusty Nail - Instrumental
Use "biting" guitar tones or distorted synth leads to mimic the "metal" aspect. Create singable melodies on the guitar or synth
Writing an instrumental requires the lead instrument to act as the "voice" of the song. grinding "sludge" tempo or a driving
If you're building from scratch, Cubase or similar software allows you to layer "Lego blocks" of sound to find the right direction.