CD – ROM (CD DRIVES)
• Stands for Compact
Disc-Read Only Memory
• They can only read
information not write.
CD-R (CD DRIVES)
Stands for Compact Disc-Recordable
It can record information but one can not erase or edit the information
CD-RW (CD DRIVES)
Stands for Compact Disc-ReWritable
It can write and later erase or rewrite the information.
DRIVE PERFORMANCE (CD DRIVES)
CD-ROM drives are usually labelled to as 12X, 16X or some other X value.
The X value refers to the data transfer rate relative to 150KB/sec 1x.
Also known as DigitalVideo Disc.
It has several types, the single-
layer DVD media with memory up
to 4.7 GB on a storage disc while
the dual-layer or double-layer
DVD media can pack up to 8.5 on
a single disc
DVD DRIVES (DRIVE PERFOMANCES)
Currently, the fastest write speed is 20X for recording on a single-layer DVD-R and
Double-layer DVD+R and dual-layer DVD-R media write speeds are currently at
Stand for Integrated Drive
This means that the controller
circuitry is on the drive rather than
on a separate card
ATAPI (ATAttachment Packet
Interface) is the protocol that is used
to communicate with non-hard drive
IDE devices like CD-ROMs
Stands for Small Computer Systems
Gives faster connection throughout
and reduces the load on the
Plextor models will rip reliably
Standard SCSI supports up to seven
devices on the same channel.
Some external drives can
sometimes be based on SCSI but
are usually limited to just one
They use parallel interface so that
there can be two or more
connections but only one at a
Stands for Universal Serial Bus
General purpose interface
designed to overcome the
limitations of serial and parallel
Most overlooked devices in
It handles analog to digital (A/D)
and digital to analog (D/A)
conversion, mixing, music
synthesizing, sound effects, and
It is a data storage medium that is
composed of a disk of thin,
flexible (“floppy”) magnetic
storage medium encased in a
square or rectangular plastic shell.
It can handle data up to 1.44MB
Officially known as the Compact
Disc DigitalAudio or CD-DA
It remains the standard physical
medium for the sale of
commercial audio recordings to
the present day.
DVD-Audio (Commonly abbreviated as
DVD-A) is a digital format for delivering
very high-fidelity audio content on a
An advantage of using a DVD-Audio disc
is that users may optionally employ a
copy protection mechanism called
Content Protection for Pre-recorded
This prevents users from extracting audio to
computers and portable media players.
Digital audio player, more
commonly referred to as an MP3
player, is an electronic device that
stores, organizes and plays audio
files from 32GB up to 250GB.
Known as portable data storage
Characterized as small, handy and
about the size of a human thumb
SPEAKERS AND HEADPHONES
These are essential for listening to
The importance of selecting the
right kind of microphone is often
overlooked by ICT technicians.
TWOTYPES OF MICROPHONES
Dynamic Microphone (also known as a Karaoke microphone)
Works with most sound cards.
Condenser Microphone (also known as a powered microphone)
Only works with sound cards that can provide power to the microphone.
TWOTYPES OF MICROPHONES
Moving coil with magnet (like a speaker)
Requires no power
Generally more rugged than condenser microphones
(except for ribbon mics)
Generally not as sensitive as condenser microphones
Generally not as flat as condenser microphones
Condenser (Electret) Microphone
Moving diaphragm only (no coil to move)
Flatter than dynamic microphones
More sensitive than dynamic microphones
Requires power source
Traditional microphones require high-voltage power
supplies (9 volts)
Modern electric microphones require only battery (or
Not as rugged as dynamic microphones