FINAL YEAR PROJECT PRESENTATION Automatic Piano Tuning Presented - - PowerPoint PPT Presentation

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FINAL YEAR PROJECT PRESENTATION Automatic Piano Tuning Presented - - PowerPoint PPT Presentation

Apr 09, 2024 315 likes •866 views

American University of Beirut Faculty of Engineering and Architecture Mechanical Engineering Department FINAL YEAR PROJECT PRESENTATION Automatic Piano Tuning Presented By: Tilbian, Joseph Matossian, Garo Project Supervisor: Prof. A Smaili

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American University of Beirut

Faculty of Engineering and Architecture

Mechanical Engineering Department

FINAL YEAR PROJECT PRESENTATION

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Automatic Piano Tuning

Presented By: Tilbian, Joseph Matossian, Garo Project Supervisor: Prof. A Smaili

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Introduction and Problem Statement

  • Piano tuning, an art and a profession
  • The “Automatic Piano Tuner”
  • A precision instrument to tune a piano
  • No Prior knowledge about tuning needed
  • Easy to handle
  • Markets for such an instrument
  • Household Use
  • Piano Manufacturing Companies
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SLIDE 4

Literature Review

  • The Nature of Sound and Music Theory
  • The Harmonic Series
  • The Equal Temperament
  • Tuning Instruments
  • Design Considerations
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SLIDE 5

Literature Review

  • The Nature of Sound and Music Theory
  • The Musical Scale
  • The Interval
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SLIDE 6

Literature Review

The Nature of Sound and Music Theory

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SLIDE 7

Literature Review

The Nature of Sound and Music Theory

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SLIDE 8

Literature Review

The Harmonic Series

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SLIDE 9

Literature Review

The Harmonic Series

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SLIDE 10

Literature Review

The Equal Temperament

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SLIDE 11

Literature Review

The Equal Temperament

  • The Ratio between two consecutive semi-tones is 1.0594631
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SLIDE 12

Literature Review

Tuning Instruments

Auto Chromatic Tuners

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SLIDE 13

Literature Review

Tuning Instruments

Strobotuners

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SLIDE 14

Literature Review

  • Design Considerations
  • Design of an Instrument that hears, analyses, and

controls

  • The Microphone
  • The Micro Controller
  • The Tuning Gun
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Proposed Solution Procedure

  • Closed Loop Feedback Control System
  • The Microphone and Interface Circuit
  • The Micro Controller
  • The Tuning Gun
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Closed Loop Feedback Control System

Proposed Solution Procedure

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The Sample Scale

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  • The Microphone and Interface Circuit
  • Piezoelectric Microphone
  • Low Noise Dual Pre-Amp IC ( LM387A)

Proposed Solution Procedure

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Proposed Solution Procedure

The Microphone

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Proposed Solution Procedure

The Microphone

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SLIDE 21

Proposed Solution Procedure

The Microphone

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  • The Micro Controller
  • Sequence of Events
  • Capture and Compare Module
  • Tuning Gun Control
  • LCD Control

Proposed Solution Procedure

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SLIDE 23

Proposed Solution Procedure

  • Sequence of Events
  • Instrument turned on, welcome message displayed
  • Note to be tuned displayed
  • User can scroll up and down the scale
  • User can tune a selected note by pressing a button
  • User alerted when note is being tuned and tuned
  • Note tuned next note in the scale is displayed
  • Sequence repeated until all notes are tuned

The Micro Controller

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SLIDE 24

Proposed Solution Procedure

The Micro Controller

  • Capture and Compare Module
  • Measure the period of the acoustic signal
  • Compare the period of the captured signal to a

reference value

  • If values match, note is in tune
  • If values are not equal, Motor activated
  • Capture and compare module repeated until values

match.

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SLIDE 25

Proposed Solution Procedure

The Micro Controller - Capture and Compare

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SLIDE 26

Proposed Solution Procedure

The Micro Controller - Capture and Compare

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SLIDE 27

Proposed Solution Procedure

The Micro Controller - Capture and Compare

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SLIDE 28

Proposed Solution Procedure

The Micro Controller - Capture and Compare

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SLIDE 29

Proposed Solution Procedure

The Micro Controller - Capture and Compare

  • Capture the signal from falling edge to falling edge
  • Allocate memory locations
  • Capture and compare
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SLIDE 30

Proposed Solution Procedure

The Micro Controller - Capture and Compare

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SLIDE 31

Proposed Solution Procedure

The Micro Controller - Capture and Compare

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SLIDE 32

Proposed Solution Procedure

The Micro Controller - Capture and Compare

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Proposed Solution Procedure

The Micro Controller - Capture and Compare

If CCPRESH < CCPVALH, this implies that the frequency of the processed signal is higher than that of the preset value. The controller should rotate the motor counter-clockwise to decrease the frequency of the string. If CCPRESH > CCPVALH, this implies that the frequency of the processed signal is lower than that of the preset value. The controller should rotate the motor clockwise to increase the frequency of the string. If CCPRESH = CCPVALH, this implies that we have to compare the lower bytes.

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Proposed Solution Procedure

The Micro Controller - Capture and Compare

If CCPRESL < CCPVALL, this implies that the frequency of the processed signal is higher than that of the preset value. The controller should rotate the motor counter-clockwise to decrease the frequency of the string. If CCPRESL > CCPVALL, this implies that the frequency of the processed signal is lower than that of the preset value. The controller should rotate the motor clockwise to increase the frequency of the string. If CCPRESL = CCPVALL, this implies that the string has been tuned to the desired frequency, and we can move to tuning another string.

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SLIDE 35

Proposed Solution Procedure

The Micro Controller - Capture and Compare

  • Case of notes bellow 76.1788 Hz
  • Addition of a Prescaler
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SLIDE 36

Proposed Solution Procedure

The Micro Controller

  • Tuning Gun Control
  • Control a DC motor by a Dual H-Bridge Drive (L298N)
  • Direction of motor decided by the result of the

comparison.

  • Direction Control by 3 Pins
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SLIDE 37

Proposed Solution Procedure

The Micro Controller

  • LCD Control
  • 2 lines , 20 characters
  • Controlled by 11 pins
  • The LCD guides the user
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  • The Tuning Gun
  • The Torque
  • The Rotational Speed
  • The Motor
  • Worm Gearing
  • The Tuning Tool

Proposed Solution Procedure

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Proposed Solution Procedure

The Tuning Gun - The Torque

The Torque Wrench

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Proposed Solution Procedure

The Tuning Gun - The Torque

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Proposed Solution Procedure

The Tuning Gun - The Rotational Speed

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Proposed Solution Procedure

The Tuning Gun - The Rotational Speed

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Proposed Solution Procedure

The Tuning Gun - The Rotational Speed

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Proposed Solution Procedure

The Tuning Gun - The Tuning Tool

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Proposed Solution Procedure

The Tuning Gun - The Motor

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Proposed Solution Procedure

The Tuning Gun - Worm Gearing

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Proposed Solution Procedure

The Tuning Gun

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Results and Discussion

Packaging

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Results and Discussion

Packaging

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Results and Discussion

Packaging

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Results and Discussion

  • How to use the instrument
  • How to use the tuning gun
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Results and Discussion

  • Manufacturing Considerations
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Conclusion

  • Revolutionize the art of tuning pianos
  • Modeled to tune any acoustic or electric musical instrument
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SLIDE 54

Automatic Piano Tuning

Thank You!