Sound by Lizzy Bronson

1. Types of sound

1.1. MIDI- musical instrument digital interface- format for recording music in digital synthesizers

1.2. aif- an uncompressed file format used by mac

1.3. mono-an audio signal that is mixed together and routed through a single channel

1.4. mp3- mpeg3 is the current audio format for exchanging audio files over the internet

1.5. mp4- mpeg4 compressed file format that can be used for audio or video

1.6. silence- the absence of sound in a production

1.7. sound effects- sounds other than audio or speech that are enhanced or artificially created

1.8. speech- an example of audio that can include voice overlay, dialogue or direct address

1.9. signal- an audio signal divided into two separate channels, played back simultaneously via separate speakers

1.10. WAV- uncompressed audio format for windows

1.11. WMA- windows media audio- compressed audio format originally designed for windows media player

2. Sound General Terms

2.1. Audio- audible content in production and publishing

2.2. Bit rate- the number of bits per second processed when sampling sound

2.3. Key Frame- a frame in a timeline in which a change will occur

2.4. mixing- the process by which sounds are combined

2.5. original work- a distinctive peice created by an author or artist

2.6. ripping- the process of digitally extracting audio from cd's to a hard drive

2.7. streaming- playing audio or video immediately as it is downloaded from the internet

3. Microphones

3.1. Bidirectional microphone-picks up sound from two opposite directions

3.2. Boom microphone- a directional mic that is placed on a boom and positioned just out of a camera

3.3. lavaliere microphone-small microphone designed to pick up speech from one person

3.4. mounted microphone-attatched to a stand or boom

3.5. omnidirectional microphone- microphone that captures equally from all directions

3.6. wireless microphone- microphone not physically connected to a camera or recording equipment

4. Measurements of sound

4.1. Kilohertz- one thousand hertz that measures sampling rate

4.2. sampling rate- the number of samples taken per second when sound is recorded; currently measured in kilohertz