Sound Card

Functions of a Sound Card
**MIc In - to microphone
**Line In - this connectto a nonamplifide audio device
**Speaker out - to the speaker
**Line out - to external line in device(not to the speaker)
Generating Sound
When we insert a CD and open the sound file the above table moves to main memory.
The processor alongs with the speaaker generates physical movements which we here as sound.
Generating of sound is called Synthesize
*FM Synthesize *Wave Table Synthesize

**FM Synthesize(Frequency Modulation)
Individual sound sa,ples are generated by oscillators and are combined to form the complete sound .Most sound cards are Fm type.
Advantage
*Cheaper
*Low CPU utilitization
Disadvantage
*Low quality
**Wave Table Synthesize
Real world sound samples are stored in a ROM and are used to generate required soud
Advantage
*Good Sound Quality
Disadvantages
*Expensive
*Higher CPU utilitization

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