Sunday, September 13, 2015

Remove noise - or hiss - from recordings with Audacity 2.1.0 AKA Audacity 2015

I had written a tutorial long ago about how to remove noise (hiss) from recordings using Audacity. Audacity has grown since then and my last tute may be confusing to those who are using the latest version of Audacity, so here's a tute on using the new software.

First, open your recording in Audacity. There are two ways to do this, no matter which version of Windows you are using:
  1. Open Audacity. Go to File--> Open. Navigate to the folder where you've stored the audio file and double-click the filename.
  2. Use Windows explorer to navigate to the folder where you've stored the file. Right-click the filename, select "Open with" and select Audacity from the droplist that pops up.
The second method, though faster, may not work if you haven't opened an audio file in Audacity before. If you don't see Audacity in the droplist, simply abort the operation and try the first method given above.

Once you open the file in Audacity, it'll look something like this:

Those squiggly lines you see are the parts of the track that contain sound. In this particular track, noise was heard mainly when the person was speaking. Fortunately, there was a small section that had noise without the person's voice. Look for such sections of the track and click-drag to select one such section (all noise, no voice):

Your screen should look something like this:

Next, click Effects--> Noise Reduction:


The following screen will appear:

Click "Get Noise Profile".

You will be taken back to the track with your selected part highlighted, like so:

Hit Ctrl+A (holding down Ctrl, hit A on the keyboard) to select the entire track. Now your screen should look something like this:


Now go to Effects--> Noise Removal again:


You will be presented with the Noise Removal dialog again. This time, click "Preview":



If you are happy with the noise removal, OK your way out and export your cleaned file. If there is still a buzz, move the sliders a wee bit to the right and listen to the preview again. If you find that there is distortion of the audio track, move the sliders a wee bit to the left. Keep experimenting until you find the right balance and then OK your way out and export to wav or mp3.

Some recordings may be really too terrible to be completely cleaned. In such cases, work to a best solution.

All the best,
Deepak



20 comments:

Indian Govt Jobs said...
This comment has been removed by a blog administrator.
Akula Rahul said...
This comment has been removed by a blog administrator.
Ramya Kolluru said...
This comment has been removed by a blog administrator.
Thùy Phương said...
This comment has been removed by a blog administrator.
Ravali Reddy said...
This comment has been removed by a blog administrator.
Smitha Sharma said...
This comment has been removed by a blog administrator.
Aditya Sharma said...
This comment has been removed by a blog administrator.
Himsutta in said...

Result

Anonymous said...

I cannot BELIEVE how well this works. You have saved me so much hassle. many, many thanks.

Date Sheet Results said...

Nice Post thanks for sharing with us

ATMA 2018

for IT the said...

I am technology Enthusiast. Your blog is really awesome, attractive and impressive. I like the way you think. it is very useful for Java SE & Java EE Learners. Your article adds best knowledge to our Java Online Training from India. or learn thru Java Online Training from India Students. or learn thru JavaScript Online Training from India. Appreciating the persistence you put into your blog and detailed information you provide. Kindly keep blogging.

Trade Jinni said...

Hello nice work!!
Such a completely beneficial article. Very interesting to read this article. I would like to thank you for the efforts you had made for writing this amazing article. Keep it up the extremely good writing. I appropriate to your work please visit us Online Local Search result at right here.
Many thanks!

ASO Services said...

Thanks a lot for sharing this with all of us, I like it and we can communicate. Do you need buy app ratings and reviews. To boost app ranking and double app downloads now.

adaliadella said...

thanks for the useful post
Internet Marketing Dienstleistungen

katrinahelen said...

very useful to us.i really like it
personalrekrutierung

Anonymous said...

Amazing post. Thank u so much for sharing with us.
JAC 12th Date Sheet 2018

Dissertation Writing Services said...

I read this article. I think You put a lot of effort to create this article. I appreciate your work.
Dissertation Writing Services

miska education said...

Nice Article.

Jina LivingPositively said...

Hi, This is so cool!
Thank you so much for giving this extremely good information. This is a smart content material and easy to read. I suppose many people visit your blog and interesting questions and answers. If you have any other information related for Community Building Program for Parents. Wish you'll work like this all the time and I will come again to visit your site.
Thank You

Match Prediction said...

thanks for your valuable information.
VIVO IPL T20 All Match Predictions
IPL All Match Predictions

IPL 2019 Match Astrology

CSK vs RCB Match Predictions