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Sample Rate Conversion

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When I run FS, I set the Sound Acceleration to Basic, gives me better frames, but I noticed this Sample Rate Conversion Quality and I have been wondering what it does, so I turned it from Best to Good, noticed maybe a 1 or 2 frames more, I just would like to know what this means/does?http://members.shaw.ca/kstangrecki/soundq.jpg

The audio is digital. It is converted from analog (microphone, audio input) to digital by sampling the analog signal. The conversion is made from the frequency domain to the time domain (t=1/f). The rate of samples provides the quality or the more samples per second the better the quality.The digitalized audio needs to be converted back to analog for the speakers, the digitalized data is sampled and converted back to the frequency domain (f=1/t). Again the more samples you use from the stored data the better the quality.Let say you converted a one hertz (1 cycle/sec) sine wave to digital and you sampled the sine wave 100 times during that one cycle. It is now stored in a digital format of 100 samples. If you now convert it back to analog but use only every fourth sample, you will have less quality since you are missing some data. Good analog circuitry will try to smooth the signal back to the shape of the since wave.The above uses a single sine wave. In actuality, the sounds are many sine waves so distortion will be worse with the sounds than a single sine wave when it is converted back using a lesser sample rate.W. Sieffert

Bill Sieffert

Thank you! That told me what I wanted to know and much more :-lol Thanks again!

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