User:Ale6: Projects: Audio

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The Audacity Project will be due on Tuesday May 27th by Midnight

You will be making a podcast using Audacity
What you will need to do:

  • Software is already installed on campus computers. For your personal computers, you can download Audacity software from the audacity site:
  • There is a very good Audacity tutorial on lynda tutorial site. To access lynda tutorials, you need to log into my.ggc.edu, click on GGC Technologies Tab, locate lynda.com link and click on and then follow the directions.

Part I

Use audacity, record 30 seconds of your reading of an article or poem with the following settings:
a. mono, 8000Hz sampling rate, 16 bit depth;
b. mono, 44100Hz sampling rate, 16 bit depth;
c. stereo, 8000Hz sampling rate, 32 bit depth;
d. stereo, 44100hz sampling rate, 32 bit depth;

For each recording, export your project into a wav file, upload your wav file to your wiki ppage under projects.

Template for Posting 4 wav files:

Settings

File size

Download

Mono, 8000Hz, 16bit:

-469KB-

File:Mono8000Hz16.wav

Mono, 44100Hz, 16bit:

-2.53MB-

File:Mono44100Hz16.wav


Stereo, 8000Hz, 32bit:

-942KB-

File:Stereo8000Hz32.wav

Stereo, 44100Hz, 32bit:

-5.05MB-

File:Stereo44100Hz32.wav

Compare and contrast the four files you exported regarding sound quality and file size, and list your discussion paragraph here.

In the file 1- setting in Mono 8000Hz, 16 bit the file size (469KB) is smallest; when increasing the sampling (from 8000Hz to 44100 Hz) the file size increasing from 469KB to 2.53MB; the record get more background sound but the qualify does not change much. As same as for the case increasing quantizing (by using 32 bit) in bit depth, the file size increases rapidly, but it gives the better quality. Conclusion: When more sampling are use (by using high sampling rate), the benefit is you can get more detail; and more quantization levels are used (by using more digits to represent samples), the benefit is you can distinguish samples with subtle differences among them, and thus achieve better quality.

Now take the 4th file you exported, using audacity to get rid of unwanted background noises, and bleep out the words at 5th second time mark and 10th second time mark. Export it and post it here. File:Stereo 44100Hz 32 - Bleep 5 to 10.wav

Part II

Pick a track of music from some CD (it'll be in .aiff format) or use any mp3 file that you like and would like to make a commentary about.
In this project you will use Audacity to create a .wav file from the CD track.
Here's what to do:

Edit the track to be 60 seconds in length.Using Audacity, make the music fade in (over 5 seconds) at the beginning and fade out (over 5 seconds) at the end. After that, add a stereo track to record your voice of comments on the piece of music you have chosen to use with 44100Hz sampling rate and 16 bit depth. Make certain that your voice-over can be clearly heard over the music. This might require reducing the volume of the music so that the voice can be heard.

During the first 15 seconds your voice should come from the left.
For the middle 30 seconds your voice should come from the center.
During the last 15 seconds your voice should come from the right.

Exporting and Converting

Using Audacity to generate the sound file in different file format including .Wav format and .ogg format. When finished, you will be posting it on your wiki site under projects using the following template.


Format

File size

Download

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

-10.1MB-

File:PhamQuynhAnhHelloVietnam1.wav

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

-989KB-

File:Pham Quynh Anh - Hello Vietnam 2.ogg

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