Looking for the best robot voice generator? In this blog post, learn how to make your voice sound robotic with the different features inside Audacity. Whether you’re creating a sci-fi podcast, adding voice effects to a video, or just having fun, these methods make it easy to transform your voice into a robot for free.
Method #1: Use the Vocoder Effect
The first on our list is the Vocoder Effect. This tool combines white noise with your recording to make it sound synthesized or mechanical. This is one of the best features in Audacity that you can use to turn your voice into a robot.
To use the Vocoder effect, go to Effect > Distortion and Modulation > Vocoder.
There are several settings you can play with on the vocoder tab. These different settings will determine the quality of the voice output. For example, you can control how much of your original voice is retained after the process.
Brief description of how each setting works (source: Audacity Manual):
Distance: The smaller the distance, the more of the original modulator signal can be heard in the output signal.
Amplitude of original audio (percent): Defines how much of the original audio signal shall be contained in the carrier signal.
Output Choice: Determines the output (both stereo or not)
Amplitude of white noise (percent): The amount of white noise added to the right channel before applying the vocoder.
Number of vocoder bands: Defines the frequency resolution of the Vocoder.
Amplitude of Radar Needles (percent): The amplitude of “radar needles” added to the right channel before applying the vocoder.
Frequency of Radar Needles (Hz): The number of “radar needles” per second where only one sample per period has a non-zero value.
Each setting adds a different effect on your voice recording so make sure to preview the audio before pressing the apply button. As always, have fun experimenting.
Method #2: Apply the WahWah Effect
Next on our list is the WahWah effect. This tool creates a pulsing, modulated sound that can give your voice an electronic and artificial character. This is another feature in Audacity that is great for making your voice sound robotic.
To apply the Wahwah effect to your recording, go to Effect > Distortion and Modulation > WahWah.
Similar to Vocoder, there are a few settings you can manipulate. Again, these settings determine how good your recording will sound so you need to understand how each works.
Brief description of how each setting works (source: Audacity Manual):
LFO Frequency: Sets the speed of the band-pass filter
LFO Start Phase: This determines whether the band-pass filter starts at its lowest, mid or highest frequencies.
Depth: Determines the range of frequencies that are swept through by the band-pass filter.
Resonance: Determines the degree of resonance in the band-pass filter.
Wah Frequency Offset: Determines the “base” frequency of the band-pass filter.
Output gain: Controls the amount of gain (volume) positive or negative applied by the effect.
As always, feel free to try different values of each setting, and don’t forget to listen before clicking apply.
Method #3: Change Pitch and Tempo
The third method is doable by manually changing the pitch and tempo of the original recording. By adjusting pitch and tempo, you can make your voice sound more robotic by removing natural human inflections and creating a more monotone delivery.
To do this, duplicate the original voice twice and add each duplicate to tracks 2 and 3. Make sure to align the tracks perfectly.
After that, change the pitch on the duplicate tracks. To do that, highlight a track and go to Effect > Pitch and Tempo > Change Pitch. On the change pitch tab, change the value under percent change. Just a subtle change will do.
Finally, listen to the combination of the 3 tracks. You can try different pitches on the duplicate tracks to get the desired robotic tone.
Method #4: Pan Stereo
The final method on our list is by making the recording stereo. The stereo effect can make your voice shift between speakers which mimics the synthetic movement of a robotic system. This method is done by simply panning the audio from the center to the left and right.
To do this, do the same process you did on method 3 — create duplicates of the original audio and then change the pitch. Then on the right side of your timeline, manually pan track 2 to the left while track 3 to the right.
That’s it! You just made your voice sound like a robot.
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Final Thoughts
Audacity offers different features that can be used as a robot voice generator for free. By using vocoder and Wahwah effect, duplicating tracks and changing pitch, and panning stereo, you can craft a unique robotic sound for your projects. Try combining multiple techniques for even better results!
