Circuit Negma

C++, C, VB.NET, PCB, Electronics, Circuit Design

How to make a Robot sound in Audacity

Posted by Circuit Negma on January 7, 2010


Created By: Hussein Nosair

After searching the internet on how to create a robot sound, I finally came across an YouTube video that show how to do so. So I decided to give it a try. I also added a few more affects to the sound to make it more robotic like.

Robot Sound project

 

These are the following steps I used to create my Robot Sound:

1. Use the AT&T Labs Natural Voices Text-to-Speech Demo tool to create your audio file and save it to your computer.

2. Open Audacity program. If you do not have installed already, then you need to download and install Audacity.

 

3. Go to File > Open and open the created file from step 1 above.

 

 

 

 

 

 

 

4. Need to select the sound wave. To do so press [Ctrl + A] or Go to Edit > Select > All

5. Next, Need to add a delay to the sound wave. To do so, go to Effect > Delay. If this option is disabled (i.e. grayed out), then you need to repeat step 4 to select the sound wave. 

In the Delay Window, set the following variables:

Decay Amount : 10 dB

Delay Time : 0.01 sec

Number of Echos : 30 times

6. Need to repeat step 5 about 8 times. To do so, go to Effect > repeat Delay and repeat this 8 times or press [Ctrl + R] 8 times. If this option is disabled (i.e. grayed out), then you need to repeat step 4 to select the sound wave.

7. Will notice there is a dead time at the end of the sound wave. To get rid of the dead time, use mouse to highlight the dead time and then press the Delete key on you keyboard.

8. Next, need to make the sound wave fit to the screen size to have a better look at the resulted wave. Press [Ctrl + F] or go to View > Fit in window.

9. Repeat step 4 to select the entire sound wave.

10. Need to change the wave speed. Go to Effect > Change Speed…

In the Change speed window, change the following variable:

Percent Change : –38.00

11. Repeat step 4 to select the entire sound wave.

12. Need to change the wave tempo. Go to Effect > Change Tempo…

In the Change Tempo window, change the following variable:

Percent Change : 10

13. Repeat step 4 to select the entire sound wave.

14. Next, to normalize the sound wave. Go to Effect > Normalize…

The END Result:

  

15. Repeat step 4 to select the entire sound wave.

16. Next need to save the sound wave to a file. There is 2 options either WAV file or MP3. Go to File > Export Selection as a WAV… or File > Export Selection as MP3… If need to save under another file format, go to Audacity website and download the necessary plug-in and library files.

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