CP102 Study Guide - Final Guide: Digital Signature, Software Testing, Unit Testing
Document Summary
Digital audio music, speech and other sounds rep in binary form for use in digital devices. Analog sound wave is smooth curve digitized by slicing into vertical segments called samples sampling rate - # of times per second sound is measured during recording process (hz) Higher sampling rate means higher sound quality, and needs more storage space. Music cds have sampling rate of 44. 1 khz. Radio-quality recordings have sound sample of 8 bit#, high-fidelity recordings have 16 bit# Audio compression reduces size of sound file by removing bits of extraneous noise. Sound card transforms bits stored in audio file into music/sound effects/narrations, a device containing inputs/output jacks, and audio- processing circuitry. Contains 2 types of circuitry: digital-to-analog converter dac(transforms digital bits into analog waves) and analog-to-digital converter adc(samples live sounds and converts them into digital signals)eg. microphone. Integrated audio built into comps system board (laptops have it) Good sound quality, compressed format, used in itunes.
