CgistFall2010ITEC2110-04Project1
In this project I demonstrate the effect on file size (and therefore download speed) of saving an audio file in various formats
Format |
File size |
Dialup download time |
ADSL download time |
Download |
Using Audacity I produced a .wav format file which is: |
7.56 MB |
18 minutes |
9.91 seconds | |
Using Audacity I produced a .mp3 format file which is: |
943.31 KB |
2 minutes & 25 seconds |
1.24 seconds |
The effect of different sampling criteria on audio quality:
All the audio downloads (shown above) are full CD quality sampled at 44,100 samples per second with a 2 byte quantization level.
Below I demonstrate the effect of changing the sample rate and quantization level:
Format |
File size |
Dialup download time |
ADSL download time |
Download |
Using Audacity I produced a .wav format file which has a sample rate of 22050 samples per second and a quantization level of 16 bits : (http://en.wikipedia.org/wiki/.wav) |
5.88 MB |
14 minutes |
7.71 seconds | |
Using Audacity I produced a .wav format file which has a sample rate of 22050 samples per second and a quantization level of 8 bits : (http://en.wikipedia.org/wiki/.wav) |
2.94 MB |
7 minutes |
3.86 seconds | |
Using Audacity I produced a .wav format file which has a sample rate of 8000 samples per second and a quantization level of 16 bits : (http://en.wikipedia.org/wiki/.wav) |
2.25 MB |
6 minutes |
3.30 seconds | |
Using Audacity produced a .wav format file which has a sample rate of 8000 samples per second and a quantization level of 8 bits : (http://en.wikipedia.org/wiki/.wav) |
1.26 MB |
3 minutes |
1.65 seconds |