JrowanFall2010ITEC2110-04Project1

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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:

10.13MB

6years

less than 6 years

clickIt!

Using Audacity I produced a .AU format file which is:

-state the size of this file here-

time to download over dialup

time to download over adsl

Click here to download this version

Using Audacity I produced a .? format file which is:

-state the size of this file here-

time to download over dialup

time to download over adsl

Click here to download this version

Using Audacity I produced a .? format file which is:

-state the size of this file here-

time to download over dialup

time to download over adsl

Click here to download this version


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 : (link the .wav to wikipedia .wav entry)

-state the size of this file here-

time to download over dialup

time to download over adsl

Click here to download this version

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 : (link the .wav to wikipedia .wav entry)

-state the size of this file here-

time to download over dialup

time to download over adsl

Click here to download this version

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 : (link the .wav to wikipedia .wav entry)

-state the size of this file here-

time to download over dialup

time to download over adsl

Click here to download this version

Using Audacity produced a .wav format file which has a sample rate of 8000 samples per second and a quantization level of 8 bits : (link the .wav to wikipedia .wav entry)

-state the size of this file here-

time to download over dialup

time to download over adsl

Click here to download this version

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