Introduction to Digital Audio

Slides:

Advertisements

Similar presentations

Multimedia: Digitised Sound Data Section 3. Sound in Multimedia Types: Voice Overs Special Effects Musical Backdrops Sound can make multimedia presentations.

Advertisements

Analog Representations of Sound Magnified phonograph grooves, viewed from above: When viewed from the side, channel 1 goes up and down, and channel 2 goes.

Introduction to Digital Audio

Department of Computer Engineering University of California at Santa Cruz MPEG Audio Compression Layer 3 (MP3) Hai Tao.

A stereo audio file 1. Audio Channels Number of audio channels determines number of waveforms in a recording Two relevant types of recording Stereo recording.

4.1Different Audio Attributes 4.2Common Audio File Formats 4.3Balancing between File Size and Audio Quality 4.4Making Audio Elements Fit Our Needs.

Part A Multimedia Production Rico Yu. Part A Multimedia Production Ch.1 Text Ch.2 Graphics Ch.3 Sound Ch.4 Animations Ch.5 Video.

Chapter 4: Representation of data in computer systems: Sound OCR Computing for GCSE © Hodder Education 2011.

SWE 423: Multimedia Systems Chapter 3: Audio Technology (2)

WHAT’S THIS? ….. WHAT CHANGES? Uptown Funk 1 Uptown Funk 2. Uptown Funk 3.

Chapter 5 Analog Transmission.

DIGITAL COMMUNICATIONS.  The modern world is dependent on digital communications.  Radio, television and telephone systems were essentially analog in.

Image and Sound Editing Raed S. Rasheed Digital Sound Digital sound types – Monophonic sound – Stereophonic sound – Quadraphonic sound – Surround.

Digital audio recording Kimmo Tukiainen. My background playing music since I was five first time in a studio at fourteen recording on my own for six months.

Lecture 6: Audio Intro to IT COSC1078 Introduction to Information Technology Lecture 6 Audio James Harland

Audio data Skills: Set sample size and rate in Audacity IT concepts: analog to digital conversion, digital to analog conversion, sample rate, sample size,

-Multimedia Basics- Digital Video Integrating Technology into the Curriculum © Jim Lockard 2004.

Chapter 2 : Business Information Business Data Communications, 4e.

Representing Sound in a computer Analogue  Analogue sound is produced by being picked up by a transducer (microphone) and converted in an electrical current.

MDIA 308 Digital technologies. Converting analog to digital ADC – analog to digital conversion An analog voltage is converted in binary code Binary =

 Speech  Narration—also called voice overlay or voice track  Dialogue—between two or more characters  Direct Address—talking straight at the camera.

Digital Video An Introduction to the Digital Signal File Formats Acquisition IEEE 1394.

1 RF (Radio Frequency) technology Part ll RF (Radio Frequency) technology Part ll BASIC TELECOMMUNICATIONS.

Introduction to Sound Sounds are vibrations that travel though the air or some other medium A sound wave is an audible vibration that travels through.

Representation of Data in Computer Systems

Digital audio. In digital audio, the purpose of binary numbers is to express the values of samples that represent analog sound. (contrasted to MIDI binary.

Radio production worktext.  Analog to Digital  Analog signal – continuously variable electrical signal whose shape is determined by the shape of the.

AUDIO MEDIA 1 Created } “Borrowed” } Microphone MIDI keyboard CD’s & flash drives Internet Audio Sources 2.

Sound and audio. Table of Content 1.Introduction 2.Properties of sound 3.Characteristics of digital sound 4.Calculate audio data size 5.Benefits of using.

Signal Digitization Analog vs Digital Signals An Analog Signal A Digital Signal What type of signal do we encounter in nature?

Sound or Audio, whichever you prefer –MIDI Files.midi or.mid (Musical Instrument Digital Interface) use for instrumental music. –This format is supported.

Overview of Multimedia A multimedia presentation might contain: –Text –Animation –Digital Sound Effects –Voices –Video Clips –Photographic Stills –Music.

Sound Part 2 Sound and how to make it. What is Sound? Sound is a compression wave.

Multimedia Technology and Applications Chapter 2. Digital Audio

Music Tech.  What is the definition of sound?  What is a wave?

Sound element Week - 11.

Digital Sound Actual representation of sound Stored in form of thousands of individual numbers (called samples) Not device dependent Stored in bits.

Sound Conversion Chilin Shih University of Illinois — Urbana Champaign E-MELD Conference 2003 July 11 th -13th LSA Institute Michigan State University.

Unit 8: Electronics and Technology. Section 1: Electronic Signals & Semiconductors  Objectives:  Define and compare digital and analog signals  Describe.

1 Composite Signals and Fourier Series To approximate a square wave with frequency f and amplitude A, the terms of the series are as follows: Frequencies:

Glencoe Introduction to Multimedia Chapter 8 Audio 1 sound effect An artificially created or enhanced sound used to achieve an effect (without speech or.

Sound in Multimedia Psychology of sound what do you use it for? what techniques for its communication exist? Science of sound why does it exist? how it.

The Digital Revolution Changing information. What is Digital?  Discrete values used for  Input  Processing  Transmission  Storage  Display  Derived.

Multimedia Sound. What is Sound? Sound, sound wave, acoustics Sound is a continuous wave that travels through a medium Sound wave: energy causes disturbance.

 Speech  Narration—also called voice overlay or voice track  Dialogue—between two or more characters  Direct Address—talking straight at the.

Concepts Used to Create Digital Audio & Video Objectives &

Residential Audio & Video Systems Copyright © 2005 Heathkit Company, Inc. All Rights Reserved Presentation 15 – Digital Audio and Video.

WRITING FOR THE MEDIA RADIO NEWS. RECAP – WRITING SCRIPTS Keep your writing short and succinct The script is to be presented / read aloud 3 words per.

Data Representation: Sound

3.3 Fundamentals of data representation

GCSE COMPUTER SCIENCE Topic 3 - Data 3.2 Data Representation.

Objective % Explain concepts used to create digital audio.

Multimedia: making it Work

Image and Sound Representation

Data representation – Sound.

© 2016 Pearson Education, Inc., Hoboken, NJ. All rights reserved.

Learning Objectives Be able to explain how sound can be sampled and stored in digital form. Understand how sampling rate affects digital audio quality.

4.1 Different Audio Properties

Multimedia: Digitised Sound Data

Introduction to Digital Audio

Objective % Explain concepts used to create digital audio.

Data Representation Keywords Sound

Introduction to Digital Audio

Introduction to Digital Audio

Digital Music Scott Bennett 1/3/2019.

Chapter 4: Representing sound

Representing Sound 2.6 – Data Representation.

Recap In previous lessons we have looked at how numbers can be stored as binary. We have also seen how images are stored as binary. This lesson we are.

Objective Explain concepts used to create digital audio.

Presentation transcript:

Introduction to Digital Audio

Objectives Explain the difference between analog and digital signals Identify audio sampling standards Describe audio sampling variables Determine how variables affect file size and quality

Analog vs. Digital Signals A continuously recorded sine wave signal usually recorded on a magnetic medium

Analog vs. Digital Signals A signal that samples specified portions of a signal resulting in discrete digital information (i.e. bits of data) “Sampled” discrete data

Audio Sampling Variables Three main criteria: How many samples? OR “sampling rate” How much data per sample? OR “bit depth” How many channels sampled?

How Many Samples? Audio “Sampling Rates” Digital Video CD Quality Stereo FM Radio AM Radio Telephone

How Many Samples? Audio “Sampling Rates” Digital Video 48,000 per sec 32,000 per sec

How Many Samples? Audio “Sampling Rates” CD Quality 44,100 per sec Left & Right Channels Combined

Other Sample Rates Typical Sample Rates: Sample Rate Less 8000 Quality Telephone 11000 AM Radio 16000 FM Radio 22050 per Stereo

How Much Data per Sample? Common Sampling “Bit Depth” 8 bits of data per sample 16 bits of data

How Many Channels Sampled? Number of Channels Stereo (2 channels) Mono (1 channel) Multiple tracks

Audio Sampling Variables Quality File Size Digital Audio

Audio Sampling Variables Sample Rate Bit Depth Number of Channels Record Settings Sound Quality File Size Balance

Audio Record Rate More Audio Samples Larger Files

Audio File Size File size is determined by a combination of: Bit Depth Sample Rate No of Channels

Audio File Size File size is determined by a combination of: Sample Rate Bit Depth No of Channels Length in Minutes

Audio File Size Variables of concern: Various Sample Rates 8 bit or 16 bit Various Sample Rates Stereo or Mono Length in Minutes

Cool Edit 96 Shareware from Syntrillium Software www.syntrillium.com