Remove Noise from Audio with Audacity Free on Windows 11

Noise in this post means unwanted sound in recording such as fan noise.

The test steps – Audacity 3.6.4

On: Windows 11 Home

Download: https://www.audacityteam.org/

1. Download it from the link above, then install it.

Open it, then go to menu ‘Edit’ > ‘Preferences’ to install FFmpeg.

At the left pane, click ‘Libraries’.

I had ‘FFmpeg’ installed, you can see the version from the picture above. If you want to install or update to the new version, click ‘Download’ button.

The webpage will show, click a link in blue font ‘Installing FFmpeg’.

The new webpage will show, there is the instructions, read it then download the installer from the link in step 1.

The new webpage will show, click a link for Windows, I selected 64-bit Windows.

After downloading is done, open ‘Downloads’ folder, then open the downloaded file. Follow the on-screen instruction to install it.

I encountered an error, I clicked ‘Try again’.

Everything was fine. The new version of FFmpeg was installed on my machine.

You can see in the picture above, version is changed.

2. Open Audacity, I dropped .m4a file to Audacity’s window.

Drag to select a part of noise.

Click menu ‘Effect’ > ‘Noise Reduction…’.

At step 1, click ‘Get Noise Profile’.

Click the area in the picture below to select a track.

Click menu ‘Effect’ > ‘Noise Reduction…’.

At step 2, select ‘Reduce’ then click ‘OK’.

You can see in the picture above, the wave form is lower.

Select the track, click menu ‘Effect’ > ‘Noise Gate…’.

The new window shows, at ‘Select Function’, choose ‘Analyze Noise Level.

The message shows, check the value at ‘Suggested Threshold Setting’.

Select the track, click menu ‘Effect’ > ‘Noise Gate…’. At ‘Select Function’, choose ‘Gate’. Fill Suggested Threshold in the box of ‘Gate threshold’ then click ‘Apply’.

In the picture above, there are some noise. I zoomed in to select it easily.

To zoom in, click an icon in the picture above in order to select an unwanted part. Then repeat the steps

This free software can make it good enough. If you think it's not , you should try paid softwares.

 

The test steps – Audacity 3.6.4

On: Windows 11 Home

Download: https://www.audacityteam.org/

How to Use Google Gemini

 I think if you’re not serious about the answers of AIs or robots on information, you can use them. But if you want more than that, browsing information from different sources is a must.

Things to know by Google before using Gemini.

The test steps – Gemini by Google (Free version)

On: Windows 11 Home

Location: https://gemini.google.com

1. Go to the link above and sign in with Google Account.

If you want to communicate with voice, set input volume first.

Click a window icon at the taskbar, and click a gear icon to go to setting.

Click ‘System’.

Click ‘Sound’.

At section ‘Input’, click ‘Choose a device for speaking…’.

I chose a built-in microphone ‘Microphone Array’ then I clicked it.

Then I set input volume.

2. At your web browser, you can type a question at the box. I wanted to use voice so I clicked a microphone icon.

A dialog box showed, I clicked ‘Allow’ to allow gemini.google.com to use my microphone.

At the text box, it said “Listening”.

I asked a question using my voice, then my voice was transcribed.

I clicked ‘Submit’.

The answer showed.

I clicked a speaker icon to listen the answer.

From the picture below, users can pause it.

That’s it for a typical usage.

The message: Gemini may display inaccurate info, including ….

Gemini Advanced is a paid service.

The message: Gemini Advanced with our latest AI innovations

Here are Questions & Answers. Some answers are long, so I took a part of that.

The test steps – Gemini by Google (Free version)

On: Windows 11 Home

Location: https://gemini.google.com