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Line 112: − n order to remove ‘noise,’ we must first tell Audacity what the ‘noise’ sounds like so it can be isolated within the audio. Do this by firstly selecting a portion of the audio where nobody is talking –like a break in the conversation, so you just get the ‘noise.’ Next, go to ‘Effect’ and select ‘Noise Removal’ from the drop-down menu:+ + + Line 118:
Line 120: − + − From the dialogue box, select ‘Get Noise Profile.’ This will then take a sample of the ‘noise’ you wish to cancel out.Next, select ‘Edit’ from the top left of the screen, ‘Select...’and then ‘All’ to highlight the whole clip. Once you have highlighted the whole clip, return to the ‘Effect’ tab, choose ‘Noise Removal’ from the drop-down menu and then click ‘OK’ at the bottom of the dialogue box (see right). This will process the file and remove all of the ‘noise’ from your recording.+ + − These basic fades apply a fade to the selected audio such that the amplitude of the selection goes from absolute silence to the original amplitude (Fade In), or from the original amplitude to absolute silence (Fade Out). The shape of the fade is linear, so it appears as a straight line from beginning to end. + Line 128:
Line 131: − + − Highlight the section of audio you want to fade out to silence. The larger a section you select, the longer and slower the fade effect will be. Click "Effect," followed by "Fade Out" or "Fade In".+ + + + + +
→Removing noise
==== Removing noise ====
==== Removing noise ====
"Noise" is part of an audio signal that is not the intended signal. When you listen to music on the radio, you can hear the music, and usually also some noise. When computers record or play audio, the electronic components sometimes create extra noise. Sometimes it can be your background noise recorded your audio.
In order to remove ‘noise,’ we must first tell Audacity what the ‘noise’ sounds. Do this by selecting a portion of the audio where nobody is talking and noise has recorded – like a break in the conversation, so you just get the ‘noise’.
<gallery mode="packed" heights="300px" caption="Remove noise by using noise reduction option">
<gallery mode="packed" heights="300px" caption="Remove noise by using noise reduction option">
File:Audacity - noise reduction - click OK 2.png|Select get noise profile and select OK
File:Audacity - noise reduction - click OK 2.png|Select get noise profile and select OK
</gallery>
</gallery>
# Choose '''Effect''' → '''Noise Removal'''. The "Noise Removal" window appears. Click '''Get Profile'''. The Noise Removal tool uses the selected audio as an example of the noise to remove.
# Select the whole track.
# Open the "Noise Removal" window. Click '''OK'''. The Noise Removal tool processes the audio. The Noise Removal tool is not effective in this example because most of the signal is noise.
==== Fade a section in or fade it out ====
==== Fade a section in or fade it out ====
Audacity has tools to fade in and out. When you "fade in," it means to gradually increase the volume level from silence to the original level. When you "fade out," it means to gradually decreased the volume level from the original level to silence. Professional recordings of concerts often fade out after a song, while the audience applauds. Fading out avoids an abrupt stop at the end of the recording, because the volume level is decreased gradually to silence.
<gallery mode="packed" heights="300px" caption="Add fade in or fade out for your track">
<gallery mode="packed" heights="300px" caption="Add fade in or fade out for your track">
File:Audacity -fade out.png|After added fade out for the track
File:Audacity -fade out.png|After added fade out for the track
</gallery>
</gallery>
# Click '''Selection Tool''', then select a portion of audio to fade in or out.
# Choose '''Effect''' → '''Fade In''' or '''Effect''' → '''Fade Out'''.
Generally fade in at the beginning of an audio segment, and fade out at the end of an audio segment. You can use Audacity to create special effects if you fade in or fade out in the middle of an audio segment. You can make a surprising effect by setting Audacity to fade in or out over a few second, then adding the opposite fade inside the first fade.
==== Advanced features ====
==== Advanced features ====
Audacity is a full-fledge audio editor which has many advanced features. [http://manual.audacityteam.org/man/tutorials.html This page] lists tutorials that provide step-by-step instructions for performing all the interesting things with audio in Audacity.
Audacity is a full-fledge audio editor which has many advanced features. [http://manual.audacityteam.org/man/tutorials.html This page] lists tutorials that provide step-by-step instructions for performing all the interesting things with audio in Audacity.
==== Saving and exporting to different formats ====
# All the edits including files can be saved in '''''uncompressed''''', '''''lossless''''' quality using the '''''AU''''' format. An '''''AUP''''' project file is created, along with a folder with the same name as the AUP file that contains the project's audio data. For example, if you save a project as <code>chanson.aup</code>, a folder called <code>chanson_data</code> will contain the audio data. We can save the '''''AUP''''' project file with keyboard <code>'''Ctrl+S'''</code> shortcut or through File->Save from the Menu.
# Exporting to different audio formats can be done with <code>'''Ctrl+Shift+E'''</code> keyboard shortcut or by clicking on File -> Export through Menu. List of all available export formats supported by Audacity can be found [http://manual.audacityteam.org/man/export_formats_supported_by_audacity.html here].
=== Ideas for resource creation ===
=== Ideas for resource creation ===