Also known as progressivecore, progressive metalcore, and progressive hardcore. Similar to mathcore. Instead, it's metalcore fused with progressive metal/progressive rock or hardcore punk fused with progressive rock. Pioneers of progcore are Between the Buried and Me borrowing features from progressive rock/progressive metal, jazz, blues, and sometimes avant-garde and art rock. Instrumentation of progcore includes growled vocals with clean vocals, screaming, odd time signatures, breakdowns, and complex compositional structures.