;
0 index
1 Audio Formats
2 The need for Audio Formats
3 The MIDI format
4 MIDI's bad rap
5 Examining a MIDI file
6 Modifying a MIDI file
7 Using MIDI to study Music
8 Composing MIDI Music
9 Generating a song
10 Sampling audio
11 Modifying a sound
12 Doing more with a segment
13 Converting a file to realMedia format
14 Using a realMedia file
15 Streaming Audio

outline
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Audio Formats

1. Audio Formats



































Audio Formats

2. The need for Audio Formats

  • Raw audio data is expensive
  • Compression
  • Reconstruction


































Audio Formats

3. The MIDI format

  • Musical Instrument Digital Interface
  • NOT technically a file type!
  • A form of notation
  • MIDI file is stored by an instrument
  • Can be replayed by another MIDI Instrument


































Audio Formats

4. MIDI's bad rap

  • MIDI is looked down on in computer audio
  • Quality is dependant on hardware, skill of sequencer
  • Most typical computers have poor MIDI capabilities
  • MIDI can be most efficient format
  • MIDI can sound very good on higher-end equipment
  • MIDI accurately handles musical information
  • MIDI can be modified musically


































Audio Formats

5. Examining a MIDI file

  • Using Anvil Studio
  • Examining Event list
  • Events as a programming language


































Audio Formats

6. Modifying a MIDI file



































Audio Formats

7. Using MIDI to study Music



































Audio Formats

8. Composing MIDI Music

  • Using a keyboard or other instrument
  • Using computer keyboard
  • Drag and drop


































Audio Formats

9. Generating a song



































Audio Formats

10. Sampling audio

  • using audacity to edit a sound
  • Choosing a sampling rate
  • Choosing a bit depth
  • Recording a sound


































Audio Formats

11. Modifying a sound

  • Using layers of sound
  • Applying filters echo, noise removal
  • Trimming a sound


































Audio Formats

12. Doing more with a segment

  • Duplicating a segment
  • Avoiding clipping
  • Exporting as an MP3 File
  • Audio Compression
  • using db powerAmp


































Audio Formats

13. Converting a file to realMedia format

  • Using real producer
  • Recording from a file
  • Setting metadata
  • Setting the data rate
  • Setting the audio format


































Audio Formats

14. Using a realMedia file



































Audio Formats

15. Streaming Audio

  • File is compressed
  • a portion (maybe 10 seconds) is sent to a buffer
  • user plays file from buffer
  • New material flows in from server as user plays
  • As long as input is >= output, all is well
  • Streaming media is about throughput


































outline

Audio Formats

The need for Audio Formats

The MIDI format

MIDI's bad rap

Examining a MIDI file

Modifying a MIDI file

Using MIDI to study Music

Composing MIDI Music

Generating a song

Sampling audio

Modifying a sound

Doing more with a segment

Converting a file to realMedia format

Using a realMedia file

Streaming Audio