sound cards

Essay specific features

 

Issue:

Miscellaneous

 

Written by:

Harley R

 

Date added:

December 20, 2015

 

Level:

University

 

Grade:

A

 

No of pages / words:

2 / 468

 

Was viewed:

5982 times

 

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Essay content:

? 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...
displayed 300 characters

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