Digital Audio Production Munsang College Information and Communication Technology S2.

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Digital Audio Production Munsang College Information and Communication Technology S2

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Transcript of Digital Audio Production Munsang College Information and Communication Technology S2.

Page 1: Digital Audio Production Munsang College Information and Communication Technology S2.

Digital Audio Production

Munsang CollegeInformation and Communication TechnologyS2

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What is Digital Audio Processing?

???? ??

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Audio Format

Uncompressed format WAV (Mainly for Windows Platform) AIFF (Mainly for Mac OS)

Compression format Lossy Format ： mp3, wma, ra, aac, ac3, mp2 Lossless Format ： wav, aiff, ogg, au, flac, ra,

wma

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Bit Rate

Number of bits that are conveyed or processed per unit of time Example for mp3 audio

96 kbit/s - FM quality 128 kbit/s - Standard Bitrate quality 192 kbit/s - Digital Audio Broadcasting quality 224-320 kbit/s - Near CD quality

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Sampling Rate

The sampling rate defines the number of samples per second taken from a continuous signal to make a discrete signal. 22,050 Hz - half the sampling rate of CD 44,100 Hz - CD, VCD, SVCD, MP3 48,000 Hz - tape recorder, video server 96,000 Hz - DVD, HD DVD, Blu-ray Disc

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Different types of Channel

1.0 Mono 2.0 Stereo 4.0 Quad 4.1 Surround 5.1 Surround 5.1 Side 7.1 Front 7.1 Surround…

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5.1 Surround

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7.1 Surround

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Applications???

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Input Process Output

Input Process Output

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Steps for editing audio file

1. Prepare for the source file Import from audio CD and convert to WAV Import from *.mp3 file and convert to WAV Recording directly

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Steps for editing audio file

2. Audio Editing Basic editing (Select, delete, copy and

insert) Volume control Fade in / Fade out Noise removal Silence Audio 、 Generate Silence Adjusting Pitch and Tempo Mixing

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Steps for editing audio file

3. Export / conversion Convert to mp3 format Record in Audio CD

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Audio Editing Software…

Audacity – recording and mixing (Free)

Logic Studio – Professional Music authoring (Mac)

WavePad – Easy ringtone editing

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Audacity – Download & Install

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Audacity – Learn & Practice

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Task

Produce a 30 second audio advertisement

About your favorite song. Submit both the project file & MP3 Deadline: before next lesson your files as

2XYY_audio.aup & 2XYY_audio.mp3

http://www.babble-on-recording.com/samples.html


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NSS Other Learning Experiences – Strategies in planning and designing Career-related Experiences Ms. Ho Chun Lan, June Munsang College.

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