CMI Day 8

CMI Day 8 - The Process of Recording Sound Analog Signal An...

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The Process of Recording Sound Analog Signal 0. An analog audio signal is represented as a continuous and infinitely detailed waveform. Analog Waves Wave Characteristics Frequency Speed at which an Analog signal cycles is normally measured in Hertz 1 Hz = 1cycle per second Frequency Range of Human Hearing 20 to 20,000 Hz Digital Signals Ones and zeros 010101101 ADC Conversion Analog to Digital converter DAC Conversion Digital to Analog converter 0. The quality of an analog to digital conversion is controlled by two factors: 1) Sample Rate: Nyquist’s Theorem 2) Sample Precision: Quantization 1. Sample rate & sample precision = Resolution
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Recording Sound: Nyquist’s Theorem R=2f 2. Nyquist’s = minimum standard 3. Sample rate is twice the highest frequency being recorded. r = 2 f f = Frequency r = Sampling Rate Standards Based on Nyquist ‘s Theorum 4. CD quality audio 0. 44.1 KHz Sample Rate = 22.05 KHz 5. Professional/DAT 1. 48 KHz Sample Rate = 24 KHz Nyquist’s Theorem 6. DVD Standard 2. 96 KHz Sample Rate = 48 KHz 7. Broadcast Quality 3. 32 KHz Sample Rate = 16 KHz
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This note was uploaded on 04/08/2008 for the course SP 0710 taught by Professor Dino during the Spring '08 term at Full Sail.

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CMI Day 8 - The Process of Recording Sound Analog Signal An...

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