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Introduction
Audio basics
• The audio spectrum
• Audio dynamic range
• Recording analogue audio
• Analogue media - LPs and tape
Converting to digital audio
• Digitising audio
• PCM?encoding
• Explanation of sampling rates
• The Nyquist frequency
• Aliasing and anti-aliasing
• Bit depth and dynamic range
• Dither noise and masking dither noise
• Examples of different types of sampling
• Storing PCM Recordings
• PCM as WAV and AIFF
Bit-rate compression of digital audio
• Why do we need to compress?
• Examples of file formats - mp3, AAF, mp4 etc
• How compression works
• Using different software for compression
• Identifying compression defects and artifacts
• Streaming compressed files
• A-B comparison between uncompressed and compressed examples |
Encoding audio
• The need for error correction
• Information carried on the PQ channels
Dynamic range compression
• Why compress your dynamic range?
• Dynamic range compression vs bitrate compression
• When to apply compression
• Different examples - different sounds
• Threshold, ratio and gain - understanding the controls
Editing audio
• Simple examples of editing
• Speech editing
• Music editing
Questions and answers |
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