Transcript Digital Audio

Digital Audio
Mics and connections
Microphones
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Condenser: microphone consisting of a capacitor
with one plate fixed and the other forming the
diaphragm moved by sound waves
Microphones
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Dynamic: A microphone whose sound
pickup device consists of a diaphragm that is
attached to a movable coil
Microphones
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Piezo electric:contain ceramic or quartz
crystals linked with a diaphragm or directly
exposed to acoustic waves. This
arrangement reduces the electrical noise
and output impedance
Microphones
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Wireless: is a microphone without a physical
cable connecting it directly to the sound
recording or amplifying equipment with
which it is associated.
Digital Audio
Equipment
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Speakers: electroacoustic device, often
housed in a cabinet, that is connected as a
component in an audio system, its function
being to make speech or music audible.
(surround sound, mono, etc.)
Digital Audio
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Equipment
Headsets: a device consisting of one or two
earphones with a headband for holding
them over the ears and sometimes with a
mouthpiece attached. (which kind will help
you accomplish your objective?)
Digital Audio
Equipment
 CABLES AND CONNECTORS
Mini Plug - 1/8 in. TRS Plug
The worst audio quality. The choice of
modern audio players and consumer
electronics. This type of audio connection
typically offers a decent signal for noprofessional applications. TRS in the name
stands for Tip, Ring, Sleeve. The number
of rings tell the user if the plug is stereo
(two rings) or mono (one ring).
Phono Plug - 1/4 in. TRS Plug
Canon XLR - Female End
Canon XLR - Male end
A better alternative to the mini plug. This
type of connection is used by
professionals yet isn’t the preferred
connection. Widely used in the music
industry to connect some microphone
applications, connect speakers,
amplifiers, and guitars this plug has an
inherent flaw. It can easily be unplugged.
The number of rings also tell how many
channels the cable is capable of handling.
The best audio quality. The choice
of profession applications. This
type of audio connection typically
offers an analog signal.
The best audio quality. The
choice of profession
applications. This type of audio
connection typically offers an
analog signal.
The button at the top of the
connector prevents the cable
from accidentally being
unplugged. The cable cannot be
removed without pushing this
button.
Digital Audio
Equipment
 CABLES AND CONNECTORS
Canon XLR port
This port is used to connect XLR
cables to a device. In this
application a Microphone is
plugged into this location.
MIDI Port
This is a MIDI port. The MIDI plug allows
for input of musical notes from electronic
instruments into a computer.
RCA Phono port
This is a RCA Phono Port. Notice that
the port is color coded. The red typically
is right and the white is left channel audio.
In this application a red and white RCA
cable was used to connect a digital signal
input and output.
Phono Plug - 1/4 in. TRS Plug
This port connects phono
plugs to a device. In this
application the left and
right audio monitor
channels are output.
Digital Audio
Equipment
 CABLES AND CONNECTORS
RCA Plug
This common audio and video
connector has been around since
the 1940’s and is still used in
modern electronics. It was
originally used to connect record
players to amplifiers. Today it is
used in many different applications
but isn’t the preferred connection
for high quality video and audio.
The longer the cable the greater
the chance of interference.
6 & 4 pin Firewire cable plug
The most common way to connect digital
audio and video to a computer. It has
been adapted to audio applications. The
cable has very fast data transfer rates
and is often used to connect portable
hard drives. The term Firewire is a brand
name from Apple Inc. and is known
internationally as IEEE 1394 High Speed
Serial Bus. The four pin connector is the
smaller inset image.
A & B Type USB Plug
This type of connection was designed to
allow universal connection between
multiple devices.USB stands for Universal
Serial Bus. The connection is used for
cameras, audio devices, and data. It is
the most commonly used computer
connection in modern computers. The
inset image is also a USB plug it is a B
Type plug.
B Type USB Port
This plug is used in an audio
application. It connects an
audio board to a computer.
It is also used to connect a
computer to many many things.
Microphone
Pickup Patterns
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Omnidirectional: Sound that pick up from all directions
Microphone
Pickup Patterns
Unidirectional:
A pick-up pattern which is more sensitive to
sound arriving from one direction than from
any other.
Cardioid
Hypercardioid
Microphone
Pickup Patterns
Cardioid
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Cardioid
- heart shaped pick up pattern (uni-directional with some on the side)
Great for interviewing people with some pick up of background noises for “atmosphere”.
Microphone
Pickup Patterns
Hypercardioid = Small Shotgun Mic
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Good for recording things from extreme
distance… football games
Microphone
PIckup Patterns
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Shotgun:
type of pickup pattern that is highly
directional.
captures sound in the direction the
microphone is pointed.
subject does not have to be in close
proximity to the mic.
Good for recording things that are very
far away.
Microphone
PIckup Patterns
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Bidirectional:
will capture sound from the front
and back of the diaphragm. Good
for stereo recording or interviewing
in stereo.