Each
channel on a mixer is creating noise even when no
signal is going through that channel. Multiply that
noise by how many channels you have idle at any one
time and you can have a lot of noise. Effect
processors are notoriously noisy. Headphone bleed on
drum overheads, lead vocals, and acoustic guitars can
really mess up the dynamic range of your mix. All of
the above together makes for a lot of noise.
Although
you may not hear any of them during the louder
passages, you probably will on the quieter ones, and
this noise is eating up valuable headroom.
Ultimately, the depth of your mix will be affected.
So, it's a good idea to mute these tracks when no
material is present that you want in your finale mix.
By muting the channel, it's not routing to the master
fader on your mixing console. The noise the channel
strip is creating will not be present at the master
fader, thus, lower noise floor from your mixer, thus,
more headroom available to the mix, thus, a better
recording.
Change
the guitar tone for a better mix:
Suppose you're recording a band, and it's time to mix
down the tracks to a master tape. You bring up the
guitar, but it just doesn't seem to cut. You raise
the level a bit more, but now the guitar drowns
everything out. This happens because the guitar's
frequency range overlaps with other instruments. With
equalization, you can accent part of the guitar to
make it really noticable, while still leaving a space
for the other instruments. Adding a bit of peak
around 3kHz to 4kHz really makes a guitar solo stand
out. Since that's above the range of the tom-toms,
bass and most rhythm oriented keyboard parts, there's
no interference with these instruments.
Equalize
the guitar for better vocal support:
Your playing rhythm guitar behind a vocalist, but
because the guitar and vocal occupy a similar
frequency range, they conflict. The solution is to
cut the guitar's midrange to make room for the vocal
frequencies. This will allow you to mix the guitar
level higher but not mask the vocals.
Reduce
noise from effects pedals:
If you like using stomp boxes but want less noise,
try using one equalizer to boost the treble (say,
from 2kHz on up) going into the noisy effect, and
another post-effect equalizer to cut the treble
(again, starting at 2kHz). The amount of boost and
cut should be equal and opposite, so this is an
excellent application for simple boost/cut tone
controls.
Create
artificial stereo:
For this you'll need two amps or an amp with two
channels. Boost the bass in the equalizer going to
one amp/channel and cut the bass going to the other
amp/channel by an equal amount. Another way is to use
two graphic equalizers. On one, boost every other
band starting with the first band and on the other,
boost every other band starting with the second band.
This can help fill out a mono guitar part when
mixing.
Volume
automation is really nice if you have it. Often,
it'll negate the use of a compressor. If the track
for the most part is even dynamically, but in a few
spots the either drops or rises beyond an acceptable
level, a fader move can be executed and saved in the
automation and you will not need to insert a
compressor to even out the part. A fader move will
preserve the fidelity of the part while a compressor
will add phase distortion to it. Which would you
want?
EQ automation can also be a lot of fun
too. Here and there you may have a snare hit that
sounds a bit different, and a little EQ tweak on it
makes the offending hit sound more like the other
hits. In the hard drive realm, the offending hit may
just be replaced with a better sounding hit, but this
can be time consuming. Also, EQ automation can be
used for really cool artistic applications such as
changing the EQ on a vocal line in a certain part to
give it the "telephone" sound.
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