Some Harsh Vocal Tips (Combined from some Sites)

Death shriek
The death shriek is a singing technique which is a hybrid of the death grunt and black metal vocals, resulting in a high-pitched scream or screech.
Arguably, the death shriek can be seen as being the predecessor of black metal vocals, due to thrash metal bands such as Possessed or Destruction, both which had a significant influence over early death metal bands such as Death and Obituary that utilising similar vocal techniques.
Death's debut musical album Scream Bloody Gore, from 1987, featured what was essentially death shrieking, rather than guttural growls. A similar vocal style was also displayed on Obituary's debut Slowly We Rot. It was not until Morbid Angel released Altars of Madness in 1989 that death growls were definitely established via vocalist David Vincent, and numerous bands followed in the revolutionary band's footsteps, including Cannibal Corpse, Malevolent Creation and Incantation.
Death shrieking, however, continued to grow in the shadow of the more commonly used death growl. It was developed elsewhere in genres other than death metal, most notably grindcore, in which bands would often combine growls with shrieks to create a more distinctive sound. The band Carcass is a prime example of this approach which is still common in modern grindcore bands.
The early 1900s saw a development of a new offshoot genre of death metal, mainly out of Gothenburg, Sweden, which became known as melodic death metal. Bands such as In Flames and Dark Tranquillity featured the less guttural death metal shriek to compliment their more harmonious and less intense guitar work.
In addition to this, the modern North American metalcore genre has also developed its own take on the death shriek. Bands like Killswitch Engage and ShadowsFall feature an unusual hybrid of hardcore vocals and death shrieks, some add more of a hardcore tinge to the vocals, while to others the death shriek influence is more apparent. In both cases, the pure death shriek found in the early death metal bands has been diluted to properly suit the less heavy and intense music.
Some notable death metal bands that use death shrieks: Deicide, Death, Angel Corpse, Panzerchrist, Obituary, Sceptic, Psycroptic.



How to Do Black Metal Vocals
If you want to sing black metal, you probably already know all about vocalists like Shagrath and bands like Exciter, Exodus and Primal Fear. Black metal singers differ in style and vocal range. Some scream or growl while others sing with a clear operatic voice. Read the following tips about how to develop your own black metal vocals.
Difficulty: Moderately Easy
Instructions
Step 1
Learn singing basics. You need to know the mechanics of how the voice operates and how the throat, diaphragm and breathe relate to each other when you sing. Even when growling death or black metal, the more you learn about vocal functions, the better you'll be able to produce the sounds you want.
Step 2
Select the vocal style that is appropriate for your voice and personality. You can sing in a high-pitched shout or a raspy lower register growl. Practice singing with your own lyrics or with songs by Mayhem or Dimmu Borgir.
Step 3
Practice singing along with your favorite black metal songs. Once you have mastered that, turn the volume down and concentrate on your own vocal technique. You might sound better with a back of the throat gurgling sound or a deep-down sci-fi monster growl, experiment and gauge what feels more comfortable with your voice.
Step 4
Perfect a guttural black metal sound. Leave the throat open and let air out by pushing it with the diaphragm. Project this sound with your mouth slightly closed or in a round O shape. Control your vocals by positioning air towards the roof or your mouth.
Step 5
Protect your voice. Drink water and juice and put the beer away before show time. Save that for later. Drinking alcohol can cloud up your vocals and prevent you from hitting high notes.






Black Metal Vox Tips
Remember, trying harsh vocals at a young age can cause permanent damage. However, if you want to try, read these following tips:
1. Listen to any album using harsh vocal techniques. I assume you already do. Do not try to imitate a vocalist in particular, get your own style.
2. Learn how to sing properly. The most important technique for performing death/black metal vocals is to be able to control your breathing, establishing a balance between the force used by your diaphragm and your vocal cords. Using only the vocal cords will put undue pressure on them and is sure to damage them (minor damage will heal in time). Proper technique is established by using the diaphragm to push air out of your lungs.
3. Try going sssssss quietly and then increase in volume. The feeling in your stomach is your diaphragm, the push. This is what you want to feel when performing death metal vocals.
4. Pick a lyric you want to perform. Always try to pick songs from bands who do not use the death grunts as it will be easier to rehearse your grunts. Try singing it normally, then slowly add more "fire" to it, until you can feel your diaphragm really pushing and you're getting that deep sound you're looking for. If you don't succeed in the deep guttural vocals try the raspier approach to these vocals. Anyone can achieve this. So long as your vocal range is Alto or lower. If you are a Soprano, don't even try. This will help you achieve the vocals. Once you have control you can make them sound raspy
Steps
Listen to an album that showcases harsh vocal techniques. Good references include Cannibal Corpse, Behemoth, Death, Deicide, Celtic Frost, Carcass, Hate Eternal, Morbid Angel, Suffocation, Vader and Besatt.
Learn how to sing properly. Start with something that has vibrato, like Classic Rock or Progressive, i.e. Nevermore. The most important technique for performing death metal vocals is to be able to control your breathing, establishing a balance between the force used by your diaphragm and vocal cords. Using only the vocal cords will put undue pressure on them and is sure to damage them (minor damage will heal in time). Proper technique is established by using the diaphragm to push air out of your lungs.
Warm up your voice before recording or performing death metal. "Warming up" can mean anything from singing mid-tone melodies to delivering your vocal patterns in a clean chest tone. Even humming for five minutes would be more beneficial to you than not warming up your voice at all.
When performing live, drink lukewarm water or tea an hour before performing, as well as in between songs. Avoid cold water, as it shocks the voice, and causes the vocal cords to "tense up." Following these simple guidelines will help protect and strengthen your vocal cords. If you don't sing properly, you may not be singing for much longer.
Fill up your lungs with air, then push out some of the air, tightening your throat and moving your tonsils as you do this. Do this all in one motion, but don't push too hard. Aim the sound higher in your throat to make a "dying old man"-like sound. It should sound something like a black metal raspy voice. From there lower the pitch in your throat the same way you would with your normal voice. At first, it won’t sound like much-- it takes some time to get used to.
Pick a lyric you want to perform. Try to choose songs from bands like Slayer, Metallica, Alice Cooper, AC/DC or other bands who do not use the death grunts, as it will be easier to rehearse your grunts (Six Feet Under has redone classic rock songs and given them a Death Metal makeover). Try singing it normally, then slowly add more "fire" to it, until you can feel your diaphragm really pushing and you're getting that deep sound you're looking for. If you don't succeed in the deep guttural vocals try the raspier approach to these vocals like Mark Hunter of Chimaira. Anyone can achieve this, men as well as women (listen to the current vocalist for Arch Enemy), as long as their vocal range is Alto or lower. Arch Enemy's Vocalist Angela Gossow is an alto, and will say it herself--if you are a Soprano, don't even try Death Growls.
Practice barking like a dog. Take a deep breath and go from your diaphragm. Force the sound out from the bottom of your belly, really imitating the barking sound. Then extend the barking sound and try it with several words. Breathing like a dog, as stupid as it sounds, can help you open your throat and get a guttural sound to your grunts. Don't do it loudly at the beginning--increase your volume as you get better at it.
After you've mastered basic death grunts, move on to bigger things. Make your grunts louder, faster, lower, deeper, or all of the above. It will help add some variety to your vocals.
After you've mastered death metal vocals, try to mix things up by learning another vocal style--even the best death metal vocalists don't use only death grunts in their songs. For example, George Fisher of Cannibal Corpse is known for having high-pitched screams in a few of his songs and Trevor Strand of The Black Dahlia Murder has been known for using a mix of death grunts, high-pitched shrieking and screaming. Also Jerry Sturino from Path changes his pitch during his songs.
After you're done performing death metal vocals, be sure to drink a healthful beverage such as the universal choice, water. Milk is a definite bad choice as it produces phlegm, which will coat your throat, stunting your progress. (Note that if your throat is sore, you're most likely doing something wrong.) Don't drink juice-- it contains citric acid, which will eat away at your throat. An occasional lemon squeezed into a glass of lukewarm water is fine, however. Water can be consumed before, during and after practicing and performing.
Sigh. It also helps if you pull your lips back in a wide open smile, tighten your throat like you are about to gurgle water, and push air from your chest. Also, looking a little up helps, since it stretches your vocal chords and makes the sound coming out a little higher.


How to Perform Death Metal Vocals
Death metal is an extreme subgenre of heavy metal, which evolved from the harsher side of thrash metal demonstrated by Slayer. The accustomed vocal style of death metal involves deep, guttural growls; however, the style has evolved to include violent shrieks and variations of the growl.
Notice: This article is not a health guide, and you're advised to consult your doctor before performing death growls for long periods. Special thanks to FireProphet and Felipe "Phil" Diez III of Encryptor for giving this writer some of the advice found in this article.
Things You'll Need:
* Thick vocal cords
* Patience and endurance
* A passion for death metal
* Guidance from your doctor (only if you feel it is necessary)
Step 1
Experiment. Death metal vocals don't come from the throat but the diaphragm. Fill your lungs with air, and push out the air tightening your throat to create the guttural sound. It should feel like a constricting egg in the very back of your throat. To start, try talking normally and moving your voice to a lower, and lower register. (Use the lyrics of your favorite song, or something you've penned yourself. Something aggressive works well; however, don't use words that make you too angry: contrary to popular belief, technique is far more important than anger in death metal vocals, and an overpowering sense of anger actually hampers the performance.) Once you've established your basic growl, experiment with lower growls and different tones. If your growls initially aren't very loud, don't fret: this often comes with time. However, do not try to growl from your throat; this will wreck your vocal cords, and not to mention, sound terrible.
Step 2
Find the style of vocal that suits your voice and preference best. From the commanding grunts of Scar Symmetry; to the guttural screams of Children Of Bodom, Arch Enemy, and Living Sacrifice; to the inflated hollers of Napalm Death and Mortification, and the deeply guttural gurgles of Cannibal Corpse and Impending Doom, there is a style for any thick set of vocal cords. Don't try to growl lower than what is comfortable and consistent; this will actually lead to a less low (and very restrained) sound.
Step 3
Melodically pitching a guttural growl is impossible; however, it is important to understand that death metal vocals are more than mindless growling, and actually employ a range of "tones". (Begin by singing along to your favorite death metal songs, this is the best way to learn proper technique in performance.) Always plan the tone and accent of each lyric and syllable before recording; otherwise you'll slip up while recording. Choose the tone for each word first and foremost by what sounds pleasing to the ears, and secondly by the emotion the lyric implies.
Step 4
By now, you have established your default style of growls. Is it the constant grunt of Mortification? Is it an enraged low scream Children Of Bodom would be proud of? You might not have "mastered" it just yet (this takes time!), but you have a basic idea of what you'll be doing the most in your death metal compositions. Now diversify with growl variations of your choice:
Step 5
Violent Shrieks/Screams:
Want to contrast your low growls with a guttural shriek? If you've mastered death growls, picking up this style should be fairly easy. Start with a standard growl, and take it higher and higher in your register. Flap your tongue around the roof of your throat while screaming to create the twisted, deranged sound most commonly heard in death metal shrieks. If you're aiming for more of a black metal, "dying old man" shriek than something along the lines of The Black Dahlia Murder or Bring Me the Horizon, use a bit more throat for a wild, uncontrolled sound. (Note that the syllable-tone rule also applies to shrieks.) For the raspy screams of Carcass and Zao, coat your throat with phlegm. (If this looks disgusting on paper to you, just think of how Louis Armstrong had no problem employing the powers of phlegm in his singing.) The rasp technique involves more screaming from a phlegm-coated throat than use of the diaphragm; however, be sure not to rely wholly on your throat, unless you want to wreck your vocal cords, and/or sound like the guy from The Devil Wears Prada.
Step 6
Inhales:
Though commonly criticized by the metal community, the inhaled growl is incredibly sinister and haunting, and has gained much popularity among vocalists in recent years. It is most commonly heard in (but not limited to) slam death metal and deathcore, and may have evolved from goregrind. Simultaneously lower, yet more screeching than most growls, it may be the most inhuman sounding death vocal style ever developed (it sounds more like a pig). As the name suggests, this technique involves inhaling the air and allowing the throat to rattle (death growls in reverse), as well as enunciating everything with an "ee" consonant. If your first attempts at inhaled growls sound terrible, don't fret: this style takes time. You might notice that most inhale vocalists intersperse inhales with standard death growls (Brook Reeves of Impending Doom, for example). This is partly because the sound is tiring in long bouts, but mostly because it's extremely difficult to inhale a growl before first belting out a few standard gutturals. Start with a standard exhaled growl and gradually begin to inhale the growl, creating more and more of a screeching/gurgling sound. With time and practice, you'll be able to switch from standard growls to inhales at will. If using the inhale-vocal technique is difficult for you, try practicing it while reclining your back, or experiment with other positions.
Pig Squeals:
Pig squealing is not a vocal style of its own, but an extension of inhales. It involves manipulating the inhaled vocal's screech into the sound of a pig being slaughtered. This is done by moving the inhaled growl what feels like the center of your register and inhaling a shriek, relying completely on the "ee" consonant. A consistent pig squeal is difficult to master. This sound should be secondary in your vocal arsenal, as it is not only very difficult, but very tiring to the ears in long bouts
Tips & Warnings
When first starting out, take plenty of breaks, and don't perform growls for long periods until you're able to growl without scratching the throat. (If you hear a gurgle in the back of your throat while growling, chances are you've reached this point.) Drink warm tea or water before, after, and between sessions; this soothes the throat, whereas cold water shocks it.
It's worth forking out the dough for an expensive microphone, and/or recording software. Higher recording quality accentuates the tone you're bringing forth with your voice, whereas lower quality might amplify the weak points of your voice.
Despite the references to established death metal vocalists found in this article, you probably won't (and preferably shouldn't) sound just like your favorite vocalist. Even in death metal vocalizing, copying someone else's singing voice is nigh impossible, and the few who succeed fade into obscurity. Be bold, find your own voice. Add your own touch to the tapestry of death metal; the genre's growth has always relied on those unafraid to stand apart from the crowd.