DLC Spring 2024 Class Projects/Alexandru Stana

Project Details

This resource is designed to help students in Professor Stana's class prepare, conduct, edit, and post their podcasts to the D2L Brightspace Discussions tool. The first tool we will be working with is called Audacity. Audacity is a full-featured audio recorder and editor that can be used on your laptops. This Free, Cross-Platform Sound Editor can be used for sound recording and sound editing on either a Mac or a PC. Once you have your project recorded and edited down to your final product you will be uploading these recordings to MediaSpace and sharing them within a D2L Brightspace Discussion. This resource also provides you with directions for conducting this component of the project.

Audacity can open, edit and convert many sound file types, including the Window format (WMA) and Apple QuickTime formats (AAC) and of course the MP3 files that you have in your iTunes Library.

Download Audacity

Audacity is a free audio recorder and editor and can be downloaded by going to the Official Download link for Audacity. Make sure to select your platform.

Special note for Mac users: Be sure unblock it by going to System Preferences > Security & Privacy > Then click "open anyway" at the bottom right. You can find a picture example of the menu below.

Editing with Audacity

Basic Audio Track Settings

Audio tracks contain digitally sampled sounds. In Audacity, a channel of sound is represented by one mono audio track, a two-channel sound by one stereo audio track. Each audio track has a sample rate: common values include 8000 (telephone), 16000 (speech), 22050 (many games of recent years), 44100 (CD-Audio), and 48000 (DAT). You can specify a different sample rate for each track. You can import audio of any sample rate or bit depth and Audacity will resample and convert it to the project rate and bit depth on the fly, as well as upon Export. You can choose different sample rate conversion qualities for playback and Exporting.

Drop Down Menu

The DROP DOWN MENU shown to the right is found under the triangle button next to the file name on the track.

Here you can change the name of the track.

You can change the waveform view into spectrum or pitch for certain kinds of sound editing tasks.

You can split the stereo into two tracks for separate edits.

You can also change the sample format, that is, the bit-rate. The lower the bit-rate the smaller the file size but also the less true the sound.

Finally, you can set the Herz rate or cycle rate. Again a higher rate is a true sound and a larger file. CD sound quality is 441100 Hz. But most voice recordings sound just fine at lower rates.

Gain and Panning Controls

Gain (Volume): This slider controls the track volume, or rather the overall gain of that particular track. Its default position is in the middle, as shown in the picture to the left. This setting represents 0 dB.

Tip: the control moves in increments of 3 dB. Hold down Shift to adjust by 1 dB at a time.

Pan: This slider set the panning position of the track in the stereo field. Its default position is in the middle, as shown in the picture to the left.

Tip: the control moves in increments of 10%. Hold down Shift for finer control.

Mixing background music with a voiceover

Audacity makes it very easy to mix two different sounds together.

Open one sound (for example, the background music).
Select Import Audio... from the Project menu and open the other sound (for example, the voiceover). Either import a recorded voice or create a new track. NOTE: you can open an empty track for a new recording using the menu TRACK→NEW.
Listen to your sound using the Play button. Audacity automatically mixes them together.
Choose the Time Shift tool and adjust the position of one track or the other until they're synchronized the way you want them. You can even move tracks around while they're playing.
If you hear clipping which wasn't present in either of the original files, it means that the combined volume of the two tracks is too loud. Use the gain controls on the tracks to reduce the volumes until you don't hear clipping anymore.

Effects in Audacity

See Effects Menu to the right.

Effects Menu

Select some audio. Use the mouse or keyboard shortcuts to select some audio. You can listen to that selection as many times as you like and adjust the boundaries of the selection.
Select an effect. You can pick any of the menu effects or a LADSPA or Nyquist plugin loaded by audacity. Windows & Mac users can also use VST plugins via the VST Enabler from http:www.audacityteam.org/vst/. Effects on the menu for EFFECTS include a great variety of options. Effects include: Amplify will increase volume; Bass boost – does just what you think it does; Reverse can turn sound backwards; Echo and Delay and Chorus all enhance sound (or can make it very weird; Noise Removal helps get out those scratchy sounds.
Tweak the parameters to your liking. Play around, go wild, honk your horn. Make those tough decisions without telling anyone why.
Let the software work. Hit the OK button. Or hit the Cancel button if you're unsure about something, like what time you were supposed to take the pizza out of the oven.
Not happy? UNDO. That effect didn't cut it? Did that delay show up too late and you wondered where the summer went? No problem. Hit UNDO in the Edit menu (or press CTRL+Z). Then go back to 3. In fact, you can hit undo so many times, YOU might disappear. Or perhaps just all your edits. Who knows.

Exporting Files

Using the menu FILE→EXPORT MP3 or FILE→EXPORT WAV you can save your project into a listenable audio file, and then burn it to a CD or what-have-you.

To EXPORT to MP3 you will need to install the appropriate codec for this file type on to your Mac or PC.

For a Mac, you will need to either purchase QuickTime PRO or install the freeware utility Perian which adds various codecs to QuickTime, including MP3.

Uploading to MediaSpace

To upload an audio file to your MediaSpace account from your laptop or desktop computer:

1. Log into MediaSpace at https://mediaspace.minnstate.edu with your StarID username and password. This will take you to your My Media page.

2. Select Media Upload from the Add New menu (this can be found in the top right corner of the page.).

3. Select Choose a file to upload. You will then be prompted to browse your device for a video or audio file.

4. Once you have selected your file, a copy of it will begin to upload. At the top of the Upload Media window (see clip below), you will see a progress bar (3).

5. Once the file upload is complete, you can change the title, add a description, add keywords or tags, and select file access permissions (4).

6. Select Save (5) to complete the process.

7. Select either Go To Media, to play the file, or Go To My Media (6) to return to your My Media page.

Embedding a MediaSpace video file to a Brightspace Assignment Submission Folder

If you have not already uploaded your video to MediaSpace you will need to do so. Go to Upload a media file to MediaSpace. Once your video is posted there and finished processing you can begin to post it to a Brightspace Assignment Submission Folder.

1. Go to the Assessments menu of your Brightspace course and choose the Assignments option.

2. Within the Assignments page, select the Assignment Submission Folder you want to embed your video.

3. Within the Assignment Submission Folder, click on the Insert Stuff button(2).

4. Select Kaltura Media (see below) from the Insert Stuff list.

5. You should see all your videos load and can choose the one you are going to use by choosing the Select button and hit the "Next" button in the lower-left corner. Note:If you do not see your videos you may have your browser blocking pop-ups to this site and need to adjust this setting.

6. Click on the Insert button.

7. Click the Submit button and you are done.

Related Resources

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DLC STARS/Presenter

Chad Kjorlien
ckjorlien@winona.edu

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