1. Basics of sound recording:
When recording a sound using electronic devices you will have a high noise ratio, it is very
likely that you will have analogue distortion, and digital distortion.
Mono: This means that there would only be one type of recording equipment for example
you may only have one microphone or one speaker.
Stereo: This means that there would be more than one speaker or microphone present when
the recording will take place.
When recording onto a sound you will use a digital audio file to record on they will have
certain formats e.g. .mp3, .wav, .mid, .ogg, .wma, .aif
Analogue versus digital:
Comparison of analogue and digital sound: Analogue sound uses lest bandwidth and is more
accurate with the recording making the sound stronger and easier to hear and develop.
Digital sound however is more reliable, flexible and connects well when you use other digital
Disadvantages of digital technologies:
Digital communication require
greater bandwidth
Communication system must be
synchronised
Advantages of analogue
technologies:
Uses less bandwidth
More accurate
Disadvantages of analogue
technologies:
Random noise which can
lose signal and create
distortion
Advantages of digital technologies:
Less expensive
More reliable
Flexible
Compatible with other digital
systems
Integrated networks

2. Applications:
Interactive media products
CD- This is a compact disc which stores information; it can store items such as music or pictures. It
was first developed to play back sound recordings but was after adapted to store data. The data on
the CD can be something such as Music this music can be used in any device that would allow a cd to
be played, the music on the device can be anything that is downloadable. This is mainly used for
entertainment but can be used to transfer important music files or photos;
DVD interface- Within the media there is a concept in which two components; this can be conducted
by using something small like an SD card or something as big as the internet. The data can be used to
hold music, photos or moving images and can be played in any device that is DVD compatible. This is
mainly used for entertainment but in some cases can be used to transfer important data.
Television- This is a telecommunication device in which you can transmit moving images or sound
recordings such as radio. The sound recordings used on a telecommunication device can show the
emotion of the characters in the television show, for example if the character in the TV
show is sad, sad music will be played to show that the character is sad.
Mobile phone content- This is a device that can be used to make and receive phone
calls, this is a device that uses the sound waves across a signaled path so that the
person on the other end of the phone line can hear what the first person is saying.
Theory of sound
Waveform
Pitch- Pitch is where the ordering of the sound is related on the frequency scale. Pitches are
compared as ‘higher’ and ‘lower’ Pitch is a major attribute of musical tones, duration, and loudness.
Decibel level (dB)-The decibel (DB) is a unit that indicated the ratio of quantity. A decibel is one
tenth of a bell.
Sound generator (loudspeaker)
Frequency and pitch
The rate at which a sound wave moves is called the frequency. Frequency is measured Hz. The length
of a single cycle of a waveform is the span of time it takes for that waveform to repeat.