Detail the steps required to create a professionally produced drum pattern for a specific EDM subgenre like Drum and Bass from selection of the samples, their processing to the arrangement and mixing techniques.

Creating a professionally produced drum pattern for Drum and Bass (DnB) involves a meticulous process, extending from sample selection and processing to arrangement and mixing. Drum and Bass is characterized by its fast tempo (typically 160-180 BPM), complex and syncopated rhythms, and heavy emphasis on sub-bass. The creation of its drum patterns is a critical element of the genre and requires a detailed understanding of the techniques involved. The first step is the crucial selection of appropriate samples. In DnB, the kick drums are usually punchy with a defined transient and a deep low-end. These can be synthesized kicks or sampled from breakbeats, but they need to have a solid low-frequency thump and often a distinct click or attack. Snares are typically sharp, often layered, and sometimes heavily processed to give a cracking sound. Hi-hats in DnB can vary greatly, from tight closed hats to open hats with long tails, depending on the desired texture and rhythm. Breakbeats are a very important part of the genre and are often used as is, or chopped, edited, and processed to become the basis for many complex rhythms. Also very important are percussive elements such as shakers, rides, and other small percussive elements that help add textures and grooves to the beat. For example, for a sub-genre like neurofunk, the samples might be more distorted, processed, and synthetic, whereas for liquid DnB they might be more organic, unprocessed and soulful. The selection of the samples is directly linked to the specific type of DnB you want to produce, and this needs to be very carefully considered to get the right feel. Once the samples have been chosen, the next step involves detailed processing. The kick drum is often processed with EQ, compression, and sometimes saturation to ensure it has the correct weight and punch. For instance, a low shelf boost around 40-60Hz will add more sub-bass, while a cut around 200-300Hz can help to remove muddiness. Compression can help to control dynamics and add punch, using a relatively fast attack and release to clamp down hard on the signal. Saturation or distortion can help add harmonic content and make the kick sound more aggressive. The snare may be layered with multiple samples to give a fuller sound. These layers are then processed individually with EQ, compression, and reverb. A high-pass filter might remove unwanted low frequencies, while a boost around 1-2 kHz can enhance the crack. Reverb and delay can give it a sense of space and depth. Hi-hats are often processed with high-pass filters to remove any low-frequency information, ensuring they sit on top of the mix. They might also have compression, and subtle saturation, and panning to give them an exciting and detailed sound. Sampled breakbeats usually require processing. Often they are heavily compressed, high passed, and then individually edited and processed to emphasize some sounds over others. For example, one might focus on the kick from a break and use other elements from another break on top, carefully selecting and editing the sounds, to create something new from old. After processing, the drums are arranged in a specific manner, using a combination of full breaks and syncopated rhythms to create a complex and interesting drum pattern. A typical DnB pattern may have a kick on every quarter note. Snares are typically placed on the 2nd and ....