PoojaMoolya: Created page with " {| border=1 |'''Time''' |'''Narration''' |- |00:01 |Hello Everyone. Welcome to this tutorial on '''Edit an Audio in Audacity'''. |- |00:07 |In this tutorial, we will..."

2020-02-19T10:20:42Z

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{| border=1
|'''Time'''
|'''Narration'''

|-
|00:01
|Hello Everyone.

Welcome to this tutorial on '''Edit an Audio in Audacity'''.

|-
|00:07
|In this tutorial, we will learn to edit an audio track in '''Audacity.'''

|-
|00:14
|To record this tutorial I am using

'''Ubuntu''' Linux OS version 14.04 , '''Audacity '''version 2.1.2

|-
|00:25
|To practise this tutorial, learners should

Have installed '''Audacity''' on their system and

|-
| 00:32
| Have working knowledge of '''Audacity''' software

|-
| 00:36
| If not, for more details, refer to the '''Translation and Dubbing '''series on this website

|-
| 00:43
| I will use this timed-script for editing purpose.

|-
| 00:48
| To practise alongside, the same script has been provided in the Code Files link of this tutorial.

Please download and use it.

|-
|00:58
|Now let us open an existing '''Audacity''' project file to edit the audio.

|-
|01:04
|Earlier, we had dubbed an audio and saved it '''as Hindi-What-is-ST.aup''' on our machine.

We will open that same file here.

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|01:16
|Now, go to the saved folder and double-click on '''Hindi-What-is-ST.aup''' to open the file.

|-
| 01:25
|The '''.aup''' file opens up.

|-
|01:28
|We can see the audio track here.

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|01:32
|Before proceeding further, it is advisable to make a copy of the project file.

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| 01:38
| In case of any major editing mistake, we can always use the original audio recording.

|-
|01:45
|To make a copy, click on '''File '''and then on '''Save Project As '''option.

Give a suitable name.

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| 01:55
| I will give a name as '''Copy-Hindi-What-is-ST.aup.'''

|-
| 02:02
| Select the location.

I will choose '''Desktop''' and then click on '''Save.'''

|-
|02:09
|Now, we have a copy of the original recording.

|-
|02:13
|We will continue with this project file.

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| 02:17
| First let us learn how to '''Zoom In''' and '''Zoom Out.'''

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| 02:22
| Place the cursor on the audio track.

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| 02:25
| On the '''Edit Toolbar '''click on '''Zoom In''' and '''Zoom Out''' buttons.

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|02:32
| We can see how the audio track gets zoomed in and zoomed out.

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|02:39
|Next, let us learn how to filter out disturbing background noises.

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|02:45
|Select the portion on the audio track which has the noise.

Remember to select a portion without voice.

|-
|02:54
|Now in the '''Main Menu''', click on '''Effect '''and then on '''Noise Removal/Noise Reduction'''.

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|03:03
|Step 1: Click on '''Get Noise Profile'''.

On doing so, the selected portion will be considered as a noise sample for further processing.

|-
|03:15
|Then click anywhere on the timeline to deselect the portion.

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|03:20
|Once again, in the '''Main Menu''', click on '''Effect '''and then on '''Noise Removal/Noise Reduction'''.

|-
|03:28
|Now in Step 2: Change the value in the field '''Noise reduction'''.

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|03:35
|Use the recommended value or a lower value, that reduces the noise to an acceptable level.

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|03:42
|I will choose an appropriate value say 18.

You may also use the slider.

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|03:50
|Higher values will remove the noise completely.

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| 03:54
| However, it will also result in distortion of the voice in the audio track.

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|04:00
|Hisses and hums will become more prominent, as well.

Hence, choose this value carefully.

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|04:07
|Make sure that, in the '''Noise''' section, '''Reduce/Remove''' radio button is selected.

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|04:14
|Then click on '''OK'''.

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|04:17
|It may take some time to remove the noise, if the audio track is very long.

The process is now complete for this sample.

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|04:26
|Now, let us play the recording by clicking on the '''Play''' button.

|-
|
| Add the audio

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| 04:37
| The noise is now removed from the entire track.

|-
|04:41
|Note: In some cases, you may have to repeat the process to further reduce the noise.

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| 04:48
| However, too much of noise reduction, may give a metallic effect to the recorded voice.

Hence, do noise removal carefully.

|-
|04:59
|Let us now save the project file by pressing '''Ctrl + S '''keys.

|-
|05:05
|Do so regularly as we go along.

|-
|05:08
|It is advisable to save the project file whenever we have done any modification.

|-
|05:15
|Let us now increase the volume of the audio segment that has been recorded at a lower volume.

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|05:22
|Select the portion in the audio track, then go to '''Effect '''and then on '''Amplify'''.

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| 05:30
|We can see a value in the '''Amplification''' box.

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|05:34
| This is the optimal amplification value for this file, recommended by '''Audacity'''.

But we can also enter another value if we want to.

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|05:45
|To reduce the volume, enter negative values, say -10.

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|05:51
|To increase the volume, enter positive values, say 15.

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| 05:57
|It is advisable not to amplify the audio above the recommended value in the box.

|-
|06:03
| Too much of amplification will also enhance the background noises, hisses and hums.

|-
|06:10
|We can also use the slider to adjust the values.

I will keep the value as 10.

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|06:18
|Check the '''Allow Clipping''' option.

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|06:21
|Then click on '''OK'''.

|-
|06:24
|Sometimes, an audio file contains unwanted repeats and unwanted sounds.

|-
|06:30
|We can remove these by using the '''Cut, Copy''' and '''Paste''' options.

|-
|06:36
|First, I will split this audio clip as per my '''Timed script '''timings'''.'''

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| 06:41
|Let me play the audio. Press the '''Play''' button in the '''VCR controls'''.

|-
|
| Add the audio

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| 06:53
|I have stopped at the end of the first sentence, by pressing the '''Stop '''button in the '''VCR controls.'''

|-
|07:00
|I need to split the audio here.

|-
|07:03
|For that, click on the '''Selection Tool. '''

Make sure that the cursor is at the end of the first sentence.

|-
|07:11
|Now press '''Ctrl+I,''' which is the shortcut to split the audio track into separate clips.

|-
|07:18
|Then, slide the next clip to the timing that we want.

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| 07:23
|I will slide it to the timing given in my '''Timed script.'''

|-
|07:27
|For this, click on '''Time Shift Tool'''.

|-
|07:30
|Observe that the cursor is now changed to double-headed arrow.

|-
|07:35
|I will shift the clip by pressing the left mouse button and dragging it to the required time.

|-
|07:43
|I will repeat this process once again for the next sentence.

Play the audio.

|-
|
| Add tha audio

|-
|07:55
|I have stopped the audio by pressing the '''Stop '''button.

|-
|07:59
|I will split the audio here. For that, click on the '''Selection Tool. '''

|-
|08:06
|Make sure that the cursor is at the end of the second sentence.

|-
|08:11
|Now I will press '''CTRL+I''' to split the audio.

|-
|08:16
|Ensure that the '''Time Shift Tool '''is selected.

|-
|08:20
|Press the left mouse button and drag it to the required time.

|-
| 08:25
| Likewise, we can split and slide the remaining segment of the audio, as per the requirement.

|-
| 08:32
| Notice that there are 4 individual audio segments, at their respective timings on the audio track.

|-
| 08:40
|Save the file before moving ahead by pressing '''Ctrl + S'''.

|-
|08:45
|Now let us learn to cut, copy and paste on the '''Audio Track'''.

|-
|08:51
|Ensure that '''Selection Tool '''is selected.

|-
|08:55
|Then click on the '''Audio track '''at the beginning of the third sentence

|-
|09:00
|Play the audio.

|-
|
| Add the Audio file

|-
|09:11
|I have clicked on the '''Stop '''button to stop playing the audio.

|-
|09:16
|We can see that the third sentence ends here.

|-
|09:20
|But it has some unwanted sounds and repetitions which we need to delete.

|-
| 09:26
|Select the portion of the audio that needs to be deleted, by dragging the mouse.

|-
|09:33
|Then press the '''Delete '''key on the '''keyboard.'''

|-
|09:37
|Note that when you do this the remaining audio segments move forward on the audio track.

That audio clip has been removed from the audio track.

|-
|09:48
|Now let us learn to move an audio clip from one place to another place on the audio track.

|-
|09:55
|Select the audio clip that needs to be moved.

|-
|09:59
|In the '''Main menu''', click on '''Edit '''and then click on '''Remove Audio or Special''' and then select '''Cut'''.

Or else use the keyboard shortcut '''Ctrl+X '''

|-
|10:14
|Note that when you do this, the remaining audio segments move forward on the audio track.

Which means it will change the timing of the remaining audio segments.

|-
|10:26
| And, we need to re-arrange the timing of the remaining audio segments all over again.

|-
|10:33
|What if we don’t want to change the timings of the remaining segments?

Let me show you what to do.

|-
|10:41
|First, undo the last action by pressing '''CTRL+Z keys.'''

|-
|10:47
|Then again select the audio clip once that needs to be removed.

|-
|10:52
|Now, press '''Ctrl + Alt + X '''keys on your keyboard.

|-
|10:58
|This will not only cut the audio segment but also keep the remaining segments in their place.

|-
|11:05
|Please note the difference between the two actions.

|-
|11:09
|Next, select a portion of an audio segment to be copied.

|-
|11:14
|I will select a portion here and click on '''Edit '''and '''Copy.'''

Or else use the keyboard shortcut '''Ctrl+C'''.

|-
|11:25
|To paste, move the cursor to the place where the audio segment needs to be placed and click there once.

|-
|11:33
|Then click on '''Edit '''and '''Paste.'''

Or else use the keyboard shortcut '''Ctrl+V'''.

|-
|11:43
|Notice here - the 2 segments appear to be merged.

But it is not so.

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|11:49
| Merge the two segments by clicking on the joint between the 2 segments.

|-
| 11:54
| Now you can move the whole segment wherever you want.

|-
| 11:59
| Let me '''zoom out''' here to view the whole audio segments.

|-
| 12:04
| Observe that if I try to move this audio clip to the beginning of this track, I am not allowed to do so.

|-
|12:12
|This is because there is no sufficient space available there to accommodate this clip.

|-
| 12:18
| Now, let us try the first audio segment.

|-
|12:22
| Drag the 1st audio segment and move it to the end of the fourth audio segment.

|-
|12:28
|After creating space, we are able to move the second segment to the beginning of the track.

This is because now there is enough space available here.

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| 12:40
| So the standard rule is to first create sufficient space on the track and then move the segments.

|-
| 12:48
| Undo the last action by pressing '''CTRL + Z '''keys.

|-
|12:53
|Once all the edits are complete, save the project file once again.

|-
|12:58
|Lastly, we need to '''Export''' the final project into a format suitable for playback.

|-
|13:05
|Let us export this file into '''mp3 '''format.

|-
| 13:09
|For this, go to the '''Main menu '''bar. Click on '''File''' and then on '''Export.'''

|-
|13:15
|The '''Export file '''dialog box appears.

It will ask us for a name'''. '''Enter the preferred name for this file.

|-
|13:26
|I will name the file as '''Hindi-What-is-ST'''.

|-
|13:30
|Also select the location where it has to be saved.

I will choose '''Desktop'''.

|-
|13:37
|Below this, we can see a drop-down called '''file type '''or '''Format'''.

|-
|13:43
| It has various audio formats like '''wav''', '''mp3, ogg,''' etc.

|-
|13:52
|I will choose '''MP3 files '''as the format.

|-
|13:57
|Then click on '''Save'''.

|-
|14:00
|Next we will get a dialog called '''Edit Metadata'''.

|-
|04:05
|Here, we can add the '''Artist Name''' and other information as per our requirement.

I will leave these fields blank.

|-
|14:15
|Click on '''OK'''.

This will save the output as '''Hindi-What-is-ST''' dot '''mp3''' file.

|-
|14:22
| This may take some time to complete.

|-
|14:25
|Now, go to the folder where we saved the file.

Here is the '''mp3''' file which we exported.

|-
|14:32
|Let us play this file using any standard audio player.

|-
|
| Add the Audio file

|-
|14:49
|This brings us to the end of the tutorial.

|-
|14:52
| Let me summarize the tutorial.

|-
|14:55
| In this tutorial we have learnt how to-

Open an existing '''dot aup''' project file

|-
|15:03
| '''Zoom in '''and '''out '''on the audio track

'''Filter''' background noise

|-
|15:09
| '''Amplify '''the audio

'''Cut, copy, paste, delete, move''' an audio clip

|-
|15:17
| '''Merge''' two audio clips

'''Save''' and '''export''' the audio into .'''mp3 '''format.

|-
|15:25
|As an assignment, edit an audio file using the timed-script.

|-
|15:31
|The video at the following link summarises the Spoken Tutorial project.

Please download and watch it.

|-
|15:39
|The '''Spoken Tutorial Project''' Team: conducts workshops and gives certificates

For more details, please write to us.

|-
|15:49
|Please post your timed queries in this forum.

|-
|15:53
|Spoken Tutorial Project is supported by the NMEICT, MHRD, Government of India.

More information on this Mission is available at this link.

|-
|16:05
|This script has been contributed by the Spoken Tutorial Team.

And this is Mousumi Medhi from IIT Bombay signing off.

Thanks for joining.

|}

Audacity/C3/Edit-an-audio-using-Audacity/English-timed - Revision history

PoojaMoolya: Created page with " {| border=1 |'''Time''' |'''Narration''' |- |00:01 |Hello Everyone. Welcome to this tutorial on '''Edit an Audio in Audacity'''. |- |00:07 |In this tutorial, we will..."