the brave new world of musical analytics
Post on 23-Jan-2017
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THE BRAVE NEW WORLD OF MUSICAL ANALYTICS
THE BRAVE NEW WORLD OF MUSICAL ANALYTICSJon McGahee, Fletcher Prouty, and Jimmie Sanders
The AgendaInitial Concepts and PlanningThe SetupProgrammingHow It WorksMeasured Frequencies and Other DataLessons Learned Q & A
Objectives
GoalsMeasure Guitar Strings FrequencyAccurately and Automatically Tune Guitar String Applications: Electric and Acoustic GuitarsConcept Demonstration for Timpani, Violin, ect.
EquipmentLaptop with LabVIEW installationNational Instruments USB-6221 BNC Data Acquisition HardwareStepper MotorHigh Quality (For Arduino) Microphone Sound Detection Sensor ModuleDC Power SourceSound Frequency GeneratorProfessionally 3D Printed Tuning Peg Apparatus Ink PenThinking CapsElectric GuitarThe TAs
Procedure
Create Necessary Coupling with 3-D PrinterTest MotorGet microphone working with tone generatorCreate necessary filteringDesign VITesting
User Interaction
Select desired noteRepeatedly strum guitar string Motor turns tuning pegs until in tune*
THE VI- Stepper Motor Initialization
THE VI- Looping Mechanism
THE VI- Measuring Frequency
How Microphone Works
THE VI- Measuring Frequency
How Power Spectrum and PSD Works
Uncertainty of +/- 5 Hz
THE VI- Measuring Frequency
VI Continued
Demonstration
ResultsConsistent with tone generatorAverage measured frequencies of each stringHigh E: 296.4 HzB: 152.4 HzG: 182 HzD: 158 HzA: 187 HzLow E: 175 Hz Better when start over tunedMultiple Runs Needed
String Calibration
Expected Frequency: 329.6 Hz Measured Average: 296.4 Hz
Expected Frequency: 246.9 Hz Measured Average: 152.4 Hz
String Calibration
Expected Frequency: 196.0 Hz Measured Average: 182 Hz
Expected Frequency: 146.8 Hz Measured Average: 158 Hz
String Calibration
Expected Frequency: 110.0 HzMeasured Average: 187 Hz
Expected Frequency: 82.4 Hz Measured Average: 175 Hz
Room For Improvement?Amplify the GuitarStronger Motor Accurate MicFriendlier User Interface Funding and Other Monetary Investments
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