sound technology. basics of sound sound is perhaps the most sensuous element of multimedia types of...

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Sound technology

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Page 1: Sound technology. Basics of Sound Sound is perhaps the most sensuous element of multimedia Types of sound in multimedia – speech – music – special effects

Sound technology

Page 2: Sound technology. Basics of Sound Sound is perhaps the most sensuous element of multimedia Types of sound in multimedia – speech – music – special effects

Basics of Sound

• Sound is perhaps the most sensuous element of multimedia

• Types of sound in multimedia– speech– music– special effects– mood-setting background sounds– etc

Page 3: Sound technology. Basics of Sound Sound is perhaps the most sensuous element of multimedia Types of sound in multimedia – speech – music – special effects

The power of sound

Although sound is rarely the main content in a multimedia production, remember that

• Sound can make the difference between an ordinary multimedia presentation and a professionally spectacular one

• Misuse of sound can wreck your project

Page 4: Sound technology. Basics of Sound Sound is perhaps the most sensuous element of multimedia Types of sound in multimedia – speech – music – special effects

Sound in Multimedia

• To use sound in multimedia you will not need special knowledge about harmonics, intervals, sine waves or notation

• However, you should know the following:– How to make sounds– How to record and edit sounds on your computer– How to incorporate sounds into your multimedia

work

Page 5: Sound technology. Basics of Sound Sound is perhaps the most sensuous element of multimedia Types of sound in multimedia – speech – music – special effects

Digital audio

• Digital audio means digitized sound• The source can be whatever, natural or

prerecorded• Digitized sound is sampled sound: every nth

fraction of a second, a sample of sound is stored as digital information (bits and bytes)

Page 6: Sound technology. Basics of Sound Sound is perhaps the most sensuous element of multimedia Types of sound in multimedia – speech – music – special effects

Digital audio

• Sampling rate: how often a sample is taken• Sample size: the amount of information that is

stored about each sample• Typical sampling frequencies are 44,1 kHz,

22,05 kHz and 11,025 kHz• Sample sizes are either 8 bits or 16 bits

Page 7: Sound technology. Basics of Sound Sound is perhaps the most sensuous element of multimedia Types of sound in multimedia – speech – music – special effects

Editing digital recordings• Trimming: removing dead air and blank space• Splicing and assembly: remove the extraneous noises

and assemble longer recordings from many shorter ones

• Volume adustments: provide a consistent volume level

• Format conversion: convert your file to a proper format

• Resampling or downsampling: if using lower rates and resolutions, but 16-bit sampling rate (to save disk space)

Page 8: Sound technology. Basics of Sound Sound is perhaps the most sensuous element of multimedia Types of sound in multimedia – speech – music – special effects

Editing digital recordings

• Fade-ins and fade-outs: to gradually fade-in or –out if needed

• Equalization: modify recording’s frequency content to sound brighter or darker

• Time stretching: alter the length without changing the pitch

• Digital Signal Processing (DSP) (reverberation, multitab delay, chorus etc)

• Reversing sounds

Page 9: Sound technology. Basics of Sound Sound is perhaps the most sensuous element of multimedia Types of sound in multimedia – speech – music – special effects

Audio file formats

• There are dozens of them, created for different purposes over the years

• Nowadays the most used digital audio formats are mp3 (computers, portable mp3 players, some DVD players), wma (Windows-only audio format) and rm/ram (RealAudio format).

• Other formats: .aiff, .mod, .snd, .mid, .wav

Page 10: Sound technology. Basics of Sound Sound is perhaps the most sensuous element of multimedia Types of sound in multimedia – speech – music – special effects

Adding sound to your multimedia project

• Decide what kind of sound is needed and where you’ll use them

• Acquire source material• Edit the sounds to fit your project• Test the sounds to be sure they are timed

properly

Page 11: Sound technology. Basics of Sound Sound is perhaps the most sensuous element of multimedia Types of sound in multimedia – speech – music – special effects

Stereo recording

Page 12: Sound technology. Basics of Sound Sound is perhaps the most sensuous element of multimedia Types of sound in multimedia – speech – music – special effects

Dynamic microphone

Page 13: Sound technology. Basics of Sound Sound is perhaps the most sensuous element of multimedia Types of sound in multimedia – speech – music – special effects

Capacitor microphone

Page 14: Sound technology. Basics of Sound Sound is perhaps the most sensuous element of multimedia Types of sound in multimedia – speech – music – special effects

High sound pressure possible

General microphone

Sensitive, low sounds

Phantom power

Attenuates handling sounds Sensitive to handling sounds

Interview, song, speech, percussions, music

Effects, speech, music

Page 15: Sound technology. Basics of Sound Sound is perhaps the most sensuous element of multimedia Types of sound in multimedia – speech – music – special effects

Sphere Heart, cardioid Shotgun Eight

Page 16: Sound technology. Basics of Sound Sound is perhaps the most sensuous element of multimedia Types of sound in multimedia – speech – music – special effects
Page 17: Sound technology. Basics of Sound Sound is perhaps the most sensuous element of multimedia Types of sound in multimedia – speech – music – special effects
Page 18: Sound technology. Basics of Sound Sound is perhaps the most sensuous element of multimedia Types of sound in multimedia – speech – music – special effects
Page 19: Sound technology. Basics of Sound Sound is perhaps the most sensuous element of multimedia Types of sound in multimedia – speech – music – special effects
Page 20: Sound technology. Basics of Sound Sound is perhaps the most sensuous element of multimedia Types of sound in multimedia – speech – music – special effects
Page 21: Sound technology. Basics of Sound Sound is perhaps the most sensuous element of multimedia Types of sound in multimedia – speech – music – special effects

File size, Bytes

Duration of sound in seconds

Page 22: Sound technology. Basics of Sound Sound is perhaps the most sensuous element of multimedia Types of sound in multimedia – speech – music – special effects

Basic Windows sound

Page 23: Sound technology. Basics of Sound Sound is perhaps the most sensuous element of multimedia Types of sound in multimedia – speech – music – special effects
Page 24: Sound technology. Basics of Sound Sound is perhaps the most sensuous element of multimedia Types of sound in multimedia – speech – music – special effects
Page 25: Sound technology. Basics of Sound Sound is perhaps the most sensuous element of multimedia Types of sound in multimedia – speech – music – special effects