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Producing Lead Vocals
There are many types of singing and various methods of recording
vocals, from classical, crooning, rock etc. You will discover that you
need to develop personal styles and techniques of capturing and
enhancing their performance.
As a producer or engineer you need to know what is required of your
talents to effectively fulfill your role in capturing a good take and
sound.
Listening to various successful recordings will provide you with not
only a reference point but also with a framework to further enhance
your goals and objectives in capturing a solid quality performance.
Audition some CDs of vocalists sounds that can be related to what you
require. On a reference monitoring system, this should give you a
starting point in where to go with Equalization, processing, and
balance in a mix.
You will require a good quality microphone (Condenser), a preamp that
can amplify a very dynamic performance and maintain a quiet noise
floor, a versatile equalizer and a transparent compressor/limiter.
Because recording vocals is often a sensitive and emotional issue for
singers, it is a good idea to consistently give the singer positive
feedback of words of accomplishment and encouragement.
Microphones
For most vocalists a high quality large diaphragm condenser microphone
is often the choice. If you have access to a tube mic, even better. The
tube mic will sound warmer and if there is any distortion, it will be
less offensive to the ear. U-47, U-67, C-12, M-49, C-4000B are often
found in better studios and work remarkably well. U-87, Akg 414, Rhode
will be found in about every studio and often work quite well. The U-87
will have an even frequency response, where the 414 will accentuate the
high end. If recording a rock vocalist try a Shure SM-57 you will get
an enhanced mid-range sound with no distortion.
Ribbon mics like the RCA models are very good but most have a high
noise floor.
When recording bed tracks change the mic from song to song to get a
general idea of which mic sounds the best. Also when ready to record
final vocals, line up 3-4 mics and quickly have the vocalist go from
one to the other to see which mic is the most desirable. Remember to
check all the dynamic parts of the song; certain mic's sound good in
verses but might be to thin sounding in the choruses.
Microphone placement
For a lead vocal place the mic around 3"-6" from the singer. A pop
filter may be required. In choosing a pop filter, make sure it stops a
lot of wind transmission (blow at the filter and place your hand on the
other side to check) and does not affect the frequency response too
much. (Place the pop filter between your ear and a speaker and move it
in and out of the way and listen for any sound degradation). Place the
pop filter as close to microphone as possible for vocalist do not like
singing close to a pop filter. If the singer is too bassy from the
proximity effect, either change the pattern from cardiod to omni,
insert a high pass filter or simply have the singer stand a couple of
inches further back from the mic. Take note that when a vocalist is
moving back and forth from the mic in an area from 1"-3", the low
end will drastically change and become very hard to control. Make sure
the microphone is suspended in a cradle to remove or to prevent
unwanted rumble coming through the mic stand. Make sure the acoustics
of the room do not influence the desired vocal sound, which occurs when
the vocalist stands too far back from the microphone. If the room is
too live try to have the singer move in closer to the mic or dampen the
room with blankets or baffles usually close to the singer. If there is
a music stand involved for the singer to read lyrics make sure it is
dampened down and the stand doesn't ring sympathetically with the
vocal performance.
Creating The Right Environment
Before recording vocals, ask the singer what they need to feel
comfortable in the studio when recording. Remember singing is an
emotional and mental experience, so having the singer feeling relaxed
is very critical. Try to set up baffles covered in quilts and blankets
close to the vocalist, this makes the studio seem more comfortable and
helps reduce the room acoustics on the sound of the singer. Keep the
lighting tapered with a lamp or candles. You might need a small lamp to
place on the music stand so the lyrics will be seen easily. Have a
comfortable chair and table to place things on and a pitcher of water
and a glass for vocalist's throats dry up quickly. Make sure there
are pencils on the music stand for singers have a habit of changing
lyrics at the last minute. Also place them in an area of the studio
that they will be in a position to not have to look at the control room
all the time. Standing in the middle of a big studio with bright
lighting and people staring at you can be very intimidating for a
vocalist, so creating a very comfortable and relaxed environment is
very important.
Equalization
Male Vocalist:
High pass filter at 50hz
Low end 100hz-200hz
Low mids 400hz-800hz; med "Q"
Mid range 3khz-5khz
Top end 10khz and up
Female Vocalist
High Pass filter at 80hz
Low end 200hz-300hz
Lo mids 400hz-800hz
Mid range 3khz-5khz
Top end 10khz and up
Limiting and Compression
A good vocalist will work with mic distance in relationship to
dynamics. During soft and loud passages they will intuitively move back
and forth from the mic. This will lower the effect of the dynamic
control function and maintain a high quality sound. However, when
starting out as an engineer or producer you will most likely not have
this luxury or feel intimidated to solicit advice to the vocalist. Even
with a good microphone and good mic preamp, recording vocalists can be
a major problem if various processing is inserted in the wrong
sequence. For example: if you insert a compressor or limiter with too
slow of an attack time what ends up happening is the dynamics of the
vocal performance expands. This is caused by too slow of an attack time
on your comp limiter whereby the initial transient passes through the
comp limiter unaffected and the remaining vocal dynamic is affected. If
inserting EQ that enhances the mid range or high end, before this type
of setting on the comp limiter it will exacerbate the problem even
further. You could also introduce sibilance problems into the sound. To
play it safe I would suggest this technique:
First limit the vocal with a quick attack and quick release time - this
will allow you to manage the transients of the vocal. This will make
the vocal more suitable for compression, if desired. Do not EQ the
vocal before limiting. Insert the EQ directly after limiting but before
compressing. With compression the limited vocal will allow you to use a
medium to slow attack time and medium to slow release time. This
affectively compresses the tonality or vowel sounds of the vocal, which
often require level management. A ratio of 2:1 to 4:1 should suffice.
An attack time between 25-100 milliseconds and a release time of
200-500 milliseconds, or better yet use your ears to get the right
attack and release settings. Make sure the release time is slow enough
to prevent pumping and breathing yet fast enough to not affect the next
part of the signal that might not need to be compressed. When
dynamically processing a vocal try to have the vocal go back to unity
gain as often as you can for example: with a 4:1 ratio the meter should
be moving from 0VU to -4VU. If you see the meter moving from -8VU to
-4VU you are over-compressing and corrupting the quality of the vocal.
Remember, the more you dynamically process a signal, the thinner the
sound will get. Dynamic processing does not process evenly over the
frequency range, especially in low-priced compressor/limiters. When
EQing do this before the compressor. For example if the vocal has too
much low-end and is not EQed the compression will be triggered by the
low end which will only thin out the sound leaving dynamic problems
untouched. Also, if you are EQing mid-range into the vocal the
compression will factor in the EQ and compress effectively.
Sibilance
Sibilance can be very frustrating in trying to get a vocal sound that
will be intimate and present sounding. This is caused by various things
like the characteristics of the singer, over compression, the wrong
type of compression, too much EQ, etc.
To really control sibilance problems it is best to use a de-esser or
selectable Eq compressor. Using fast attack and fast release times and
bandwidth on the target problem frequencies will greatly improve the
quality. Most de-essers let you monitor the type and amount of
de-essing through side-chain monitoring so you can focus in on the
problem area. Sibilance problems range from 4khz-8khz. De-essing the
vocal reverb send also helps to keep the reverb warm and not too noisy
with a lot of high frequency splatter. When inserting de-essing place
it before any equalization or dynamic control for it will allow you
maximize its efficiency.
Headphone Mix
It is very important that you take the time to provide an excellent
headphone monitor mix to the vocalist for singing. Most vocalists will
need to hear a clear band mix with sufficient harmonic and rhythm
content. If the vocalist is getting ahead or behind the beat you will
need to send more drums or instruments with a rhythmic component. If
the song when finished will have only a lead vocal and a solo
instrument for the intro and first verse, you might suggest to the
drummer to keep time by playing the hi-hat softly so it can be used to
keep everybody in time and then can be removed for the final mix. Note
that most singers do sing ahead of the beat.
If the vocalist's pitch is a problem then you might need to send more
harmonic instrumentation to the headphone mix. If there is not enough
there you might put down a synth pad guide track for the vocalist may
reference their pitch too and then not use it in the final mix. If the
vocalist has to come in before the downbeat insert a pitch reference a
couple of seconds before the song starts. This works especially well if
there are key changes in the song and you always have to back to the
beginning. This is also a good time to experiment with reverb settings;
compression, Eq and effects for singers love to hear an enhanced sound
in their headphones. If you find the singer projecting too much or
singing too softly then they are not hearing themselves properly in the
headphones and this will cause numerous technical and performance
problems. Try to set up to record at least 4 tracks so you can have 4
takes to choose from to make a master take.