Grindcore as a music genre
This website is dedicated to the exploaration of music genre called Grindcore. Grindcore is very extreme genre of music. Taste for grindcore music is usually an acquired taste, meaning it does not come naturally for most of the people. According to Wikipedia article on this genre:
Grindcore is an extreme fusion genre of heavy metal and hardcore punk that originated in the mid-1980s, drawing inspiration from abrasive-sounding musical styles, such as: thrashcore, crust punk, hardcore punk, extreme metal, and industrial. Grindcore is characterized by a noise-filled sound that uses heavily distorted, down-tuned guitars, grinding overdriven bass, high speed tempo, blast beats, and vocals which consist of growls and high-pitched shrieks.
Grindcore is a very niche genre with relatively small amounts of listeners as it is very extreme. However, it does not mean that the genre is monotonous or dull. Grindcore being a subgenre of metal and punk has several microgenres.
Deathgrind and Goregrind
Death grind is a mixture of death metal genre and grindcore. It usually has more down-tuned guitars than regular a grindcore. It more relies on growls and low-pitched scream.
Goregrind most of the times can be characterized as deathgrind by its sound. The difference is that this microgenre relies on lyrics that depict gore and forensic pathology. The most credited band for microgenre emergence is British band Carcass, specifically, their early albums.
Coprogrind and Pornogrind
These microgenres in their sound do not differentiate from grindcore. Their major difference is their lyrical themes. Coprogrind relies on excrements and defecation, while pornogrind usually depicts pornography and perversion.
Noisegrind
The most prominent difference is Noisegrind's sound quality. It is usually heavily distorted and additional noise added to it, sometimes excessively. Most bands record their music at a very low quality. The music value of addition of noise to the music is very questionable as noise has no melody, temp or structure. The use of noise can be explained by the DIY mentality of the musicians and their preference for, as they call it, "raw" and unprocessed sound.