To compress a sound
Once you have finished editing a sound, it generally must be compressed to play in the internet.
If you are using SoundEdit or any other sound editing software, save your sound as an AIFF file (.aif) then follow the Movie Player instructions.
If you are using Peak just choose the compression you want in the save dialogue box.
To compress a sound using Movie Player
- Save your sound in SoundEdit as AIFF (Movie Player will open many kinds of sounds though)
- Open the sound in MoviePlayer 2.5
- Select Export... from the File menu.
- Choose Sound to AIFF or ... to Quicktime movie.
- Click on options and pick the sample rate, resolution and compression.
- Save the sound with extension .mov
Codecs (COmpressor/DECompressors)
Using longer sounds efficiently almost always requires that some sort of compression method be used to make efficient use of bandwidth and/or disk space. In the past few years much has happened in this area. I am am not going to be too ground breaking here but I will discuss the important ones. All these compressors work within QuickTime.
Qdesign Music
- Appropriate use: music
- File Formats: .mov
- Save using: Movie Player 2.5
- Options: 8, 10, 12, 16, 20, 24, 32, 40, 48 kbits/sec [divide by 8 to get kbytes/sec ... 1, 1.2, 1.5, 2, 2.5, 3, 4, 5, 6 kbytes/sec]
- Handled by plug-in(s): Quicktime.
- Resources: Quicktime site
Qualcomm PureVoice
- Appropriate use: voice
- File Formats: .mov
- Save using: Movie Player 2.5
- Options: 9:1 and 19:1 [This means that sounds can be reduced to 1/9 or 1/19 of the original. For 22khz-16bit this would mean 5 kbytes/sec or 3.33 kbytes/sec. For 11khz-8bit this would mean 1.22 kbytes/sec or .57 kbytes/sec.]
- Handled by plug-in(s): Quicktime.
- Resources: Quicktime site
MP3
- Appropriate use: music
- File Formats: .mp3
- Save using: MPEG Audio Creator
- Options: 32, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320 ,384 kbits/sec [divide by 8 to get kbytes/sec ... 4, 6, 7, 8, 10, 12, 14, 16, 20, 24, 28, 32, 40, 48 kbytes/sec]
- Handled by plug-in(s): Quicktime or external players.
- Resources: MPEG Audio
- Comments: By default mp3s are played using an external player making them difficult to consistently use in a web page.
Valid for Fall/Winter 2003-2004
The material contained in this site is copyright and owned exclusively by Don Sinclair and members of the FACS teaching team.
Last modified on 14-Nov-03 at 9:28 AM.
Introduction
