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Miking
Drums - by
Paul White, Editor of Sound On Sound Magazine
You may have read articles in Sound On Sound or recording textbooks
about studio sessions in the 70s where the engineer spent three
days trying to get a good kick drum sound, but really there's
no great secret to getting a good recorded drum sound and the
same miking techniques are broadly applicable in live situations.
Though
it seems obvious, you have to start with a well tuned kit fitted
with decent heads — and in my experience not everone does!
The way the drummer plays also affects the sound — no two
drummers will sound the same, even on the same kit. If the drums
ring excessively, small pads of tissue can be taped to the heads,
but don't overdamp the kit as it will sound like a set of old
suitcases when the rest of the instruments are added to the mix.
The apparent amount of ring diminishes when the rest of the mix
is playing so it’s best to leave the drums sounding slightly
too live rather than overdamping them. Avoid rattles and pedal
squeaks where possible but again don't get too paranoid about
these as they'll be mainly hidden by the rest of the mix and anyway,
modern sample-based drum sounds tend to include some rattle to
make them sound authentic!
In
rock and pop work, kick drums tend to have a hole cut in their
front head, which makes it easier to get a microphone inside on
a boom stand. You can mic from either the front or the back of
the drum if the front head has no hole, but the sound will be
quite different to the accepted pop/rock sound. At a pinch you
can simply remove the front head just for the session. Damping
the bass drum is normally achieved by placing a folded woollen
blanket inside the shell so that it just touches the rear head.
Mechanical head dampers seldom sound good. If more attack is needed,
use a wooden beater or try taping a plastic store card onto the
beater side of the head so that the beater hits the card centrally.
The easiest way to mic a drum kit is to use a pair of cardioid
microphones (though omnis work nicely in some rooms) as overheads
placed above the kit and spaced three to four feet apart. Capacitor
microphones are best in this role as their extended high end will
capture the cymbals more naturally than dynamic microphones. Usually
these will be set up two to three feet above the highest cymbals,
but where the ceiling is low, fixing acoustic foam or blankets
to the ceiling will help kill unwanted sound reflections. Two
further dynamic, cardioid pattern close microphones can be used
to pick up the important kick and snare drums. The snare microphone
is generally set up around two inches from the drum head and around
two inches in from the edge of the rim — as are tom microphones
if you add these.
Move
the overhead and kick microphones or retune the drums before reaching
for the EQ. An important point to note is that most general purpose
dynamic microphones don't produce enough low bass to do justice
to kick drums so you should pick a dedicated kick drum mic. If
you buy a boxed set of the drum microphones, the kick microphone
will usually be larger than the snare and tom microphones and
will have a good low end response tailored to the needs of the
kick drum. The snare and tom microphones are usually dynamic models,
though some systems use capacitor microphones, but the overheads
will almost certainly be some type of small diaphragm capacitor
model. If the tom and snare microphones include clips that can
be used to mount the microphones to the drum shells, this makes
your job very much easier and avoids cluttering up the drum kit
with too many extra microphone stands.
Where
the kit provides tom microphones, these can be clipped to each
of the toms in the kit to give you even more control over the
balance of the various drums, but a good sounding kit can usually
be miked satisfactorily with two overheads, a kick and a snare
mic. This basic four mic setup is commonly used for small to medium
sized live gigs as well as recording sessions, though it may be
necessary to move the overhead microphones closer to the cymbals
to avoid spill from other elements of the back line or stage monitors.
Separate hi-hat microphones are often unnecessary, but if one
should be required, a capacitor model is the best choice and should
be positioned slightly below the edge of the hi-hat so as to avoid
wind noise when the cymbals close. Note that capacitor microphones
must be connected to a mixer than can supply phantom powering
unless the microphones are designed to run from batteries.
Choosing
individual drum mics to make up your own set can cost several
hundreds of pounds but there are now several boxed microphone
sets to choose from that produce first class results at a far
more affordable price. Where possible, choose a set of microphones
that includes a pair of overhead capacitor microphones, a dedicated
kick mic and enough snare/tom mics to cover the size of drum kit
you intend to use.
Where
possible, record each microphone to a separate channel of your
recording system, though if track limitations force you to mix
some parts as you record, it is worth trying to keep the kick
and snare microphones on separate tracks if you can as this will
provide some leeway for balancing when mixing.
If
the drums are in a great sounding room, then you may not need
to do much to the sound after recording, but if the room is small
and not acoustically flattering, it may be better to improvise
acoustic screens using blankets and so on to keep the recording
as dry as possible. The overheads microphones are the ones that
pick up most room sound so pay particular attention to these.
Where you've had to dry up the sound using blankets, you'll need
to add a little reverb to the overhead and snare microphones but
a short room ambience setting with the bass rolled off is often
more natural sounding than anything to obvious.
When
you mix, it can help to EQ some of the low end out of the overhead
microphones, which should be panned slightly left and right to
give the kit a stereo image. This allows the close microphones
to provide the punch while the overhead microphones capture the
detail and lift the cymbals to the correct level. Also check the
balance of the kit and adjust as necessary when the rest of the
mix playing, paying particular attention to how the kick drum
and bass guitar work together. If you have tuned the kit well
an put the microphones in the correct position, you shouldn't
need to use too much EQ to get the kit sounding just the way you
want it to. More advanced users may wish to try using compression
on the kick drum or or the final stereo kit mix.
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