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Essay's paper info
Topic: Miscellaneous
Number of pages / Number of words: 2 / 468
Essay's paper body

? Core Functions

? Conversion of analogue signal to digital form for

computer storage

? Conversion of digitally stored sound information to

analogue form

? Common Additional Features

? MIDI control

? Synthesiser

? FM mixing

? Stored samples (wavetable)

? Software to allow basic control and use of

soundcard features

? Input is an analogue electrical signal

representing sound

? Microphone

? Pickup coil

? Tape, cd player, instrument, or generator

? Samples of this are taken at intervals and

converted to digital data

? Quality and usability dictated by

? Samples per second

? Levels per sample

? Samples per second normally expressed

in kHz

? More samples give greater accuracy of

waveshape

? Minimum sample rate = 2 x highest frequency

? Bits per sample

? More bits per sample more resolution of

amplitude of waveform

? 8-bits give 256 levels

? 16-bits give 65K levels

File size depends on number of bits per sample

and sample rate

? 11kHz sample rate at 8-bits per sample = 11kB

? 22kHz sample rate at 16-bits per sample = 44kB

? 44kHz sample rate at 10-bits per sample = 88kB

? Note that these are for single channel ? for

stereo you need double the storage...


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? Core Functions

? Conversion of analogue signal to digital form for

computer storage

? Conversion of digitally stored sound information to

analogue form

? Common Additional Features

? MIDI control

? Synthesiser

? FM mixing

? Stored samples (wavetable)

? Software to allow basic control and use of

soundcard features

? Input is an analogue electrical signal

representing sound

? Microphone

? Pickup coil

? Tape, cd player, instrument, or generator

? Samples of this are taken at intervals and

converted to digital data

? Quality and usability dictated by

? Samples per second

? Levels per sample

? Samples per second normally expressed

in kHz

? More samples give greater accuracy of

waveshape

? Minimum sample rate = 2 x highest frequency

? Bits per sample

? More bits per sample more resolution of

amplitude of waveform

? 8-bits give 256 levels

? 16-bits give 65K levels

File size depends on number of bits per sample

and sample rate

? 11kHz sample rate at 8-bits per sample = 11kB

? 22kHz sample rate at 16-bits per sample = 44kB

? 44kHz sample rate at 10-bits per sample = 88kB

? Note that these are for single channel ? for

stereo you need double the storage...


Essay fragment

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