An Approach in Reproducing the Auto-Tune Effect Mentees: Dong-San Choi & Tejas Rawal Mentor: David...
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Transcript of An Approach in Reproducing the Auto-Tune Effect Mentees: Dong-San Choi & Tejas Rawal Mentor: David...
![Page 1: An Approach in Reproducing the Auto-Tune Effect Mentees: Dong-San Choi & Tejas Rawal Mentor: David Jun.](https://reader035.fdocuments.in/reader035/viewer/2022070306/5516b002550346f6208b51f1/html5/thumbnails/1.jpg)
An Approach in Reproducing the Auto-
Tune Effect
Mentees: Dong-San Choi & Tejas Rawal Mentor: David Jun
![Page 2: An Approach in Reproducing the Auto-Tune Effect Mentees: Dong-San Choi & Tejas Rawal Mentor: David Jun.](https://reader035.fdocuments.in/reader035/viewer/2022070306/5516b002550346f6208b51f1/html5/thumbnails/2.jpg)
Overview
• Quick introduction to Auto-Tune• Methodology in recreating the Auto-
Tune effect• Application
![Page 3: An Approach in Reproducing the Auto-Tune Effect Mentees: Dong-San Choi & Tejas Rawal Mentor: David Jun.](https://reader035.fdocuments.in/reader035/viewer/2022070306/5516b002550346f6208b51f1/html5/thumbnails/3.jpg)
What is Auto-Tune?
• First created by Andy Hildebrand• Corrects out-of-tune human sung
pitches or instruments• How? Autocorrelation & Phase Vocoder• Demo using “I Am T-Pain”
![Page 4: An Approach in Reproducing the Auto-Tune Effect Mentees: Dong-San Choi & Tejas Rawal Mentor: David Jun.](https://reader035.fdocuments.in/reader035/viewer/2022070306/5516b002550346f6208b51f1/html5/thumbnails/4.jpg)
Methodology
Can be broken into two parts:1) Pitch Detection
- Autocorrelation2) Pitch Shifting
- Phase Vocoder
![Page 5: An Approach in Reproducing the Auto-Tune Effect Mentees: Dong-San Choi & Tejas Rawal Mentor: David Jun.](https://reader035.fdocuments.in/reader035/viewer/2022070306/5516b002550346f6208b51f1/html5/thumbnails/5.jpg)
Pitch Detection
• There are many different approaches to estimate the pitch of a periodic signal
• We used the autocorrelation function to determine the fundamental frequency of our speech signal
• Autocorrelation refers to the correlation of a time series with its own past and future values.
• It compares a segmented section of a speech signal (human voice) with another segment from the same signal and calculates the time separation between them. Autocorrelation is a mathematical tool that helps find repeating patterns, such as: – A periodic signal which has been buried under noise – The fundamental frequency in a signal implied by
its harmonic frequencies.
![Page 6: An Approach in Reproducing the Auto-Tune Effect Mentees: Dong-San Choi & Tejas Rawal Mentor: David Jun.](https://reader035.fdocuments.in/reader035/viewer/2022070306/5516b002550346f6208b51f1/html5/thumbnails/6.jpg)
A Visual Representation
![Page 7: An Approach in Reproducing the Auto-Tune Effect Mentees: Dong-San Choi & Tejas Rawal Mentor: David Jun.](https://reader035.fdocuments.in/reader035/viewer/2022070306/5516b002550346f6208b51f1/html5/thumbnails/7.jpg)
Pitch Shifting
• Pitch – 12 pure notes in an octave• Each note corresponds to a
frequency• “In-tune” notes • “Out-of-tune” notes• Pitch shifting in Auto-Tune
- use of a phase vocoder
![Page 8: An Approach in Reproducing the Auto-Tune Effect Mentees: Dong-San Choi & Tejas Rawal Mentor: David Jun.](https://reader035.fdocuments.in/reader035/viewer/2022070306/5516b002550346f6208b51f1/html5/thumbnails/8.jpg)
The Phase Vocoder
Use - to obtain a digital representation of speech
Application - can modify basic speech parameters to
permit alteration of time or frequency dimensions of a speech signal
![Page 9: An Approach in Reproducing the Auto-Tune Effect Mentees: Dong-San Choi & Tejas Rawal Mentor: David Jun.](https://reader035.fdocuments.in/reader035/viewer/2022070306/5516b002550346f6208b51f1/html5/thumbnails/9.jpg)
The Phase Vocoder
So…Inputs <= speech signalOutputs <= magnitude & phase
What can we do with these parameters?
![Page 10: An Approach in Reproducing the Auto-Tune Effect Mentees: Dong-San Choi & Tejas Rawal Mentor: David Jun.](https://reader035.fdocuments.in/reader035/viewer/2022070306/5516b002550346f6208b51f1/html5/thumbnails/10.jpg)
Our Approach
![Page 11: An Approach in Reproducing the Auto-Tune Effect Mentees: Dong-San Choi & Tejas Rawal Mentor: David Jun.](https://reader035.fdocuments.in/reader035/viewer/2022070306/5516b002550346f6208b51f1/html5/thumbnails/11.jpg)
Application• Auto-tune is a audio
processing system use to enhance a singer’s vocal performance
• Auto-tune uses a phase vocoder unit to correct pitch and disguise vocal mistakes
• Many famous artists such as T-Pain and Kanye West currently use Auto-tune to perfect the vocals on their tracks
![Page 12: An Approach in Reproducing the Auto-Tune Effect Mentees: Dong-San Choi & Tejas Rawal Mentor: David Jun.](https://reader035.fdocuments.in/reader035/viewer/2022070306/5516b002550346f6208b51f1/html5/thumbnails/12.jpg)
Thank You for your Time!
Special thanks to the PURE program for the opportunity and our mentor, David Jun
Any Questions/Comments?