1. Peripheral Interpreter consisting of Analyzers 'N Operators
P.I.A.N.O.
Peripheral Interpreter consisting of Analyzers 'N Operators

2. P.I.A.N.O. Project Team Team Members Course Instructor
 Curtis Hayes                 Dr. Serpen  Matthew Huie         Eric Lauber                   Faculty Advisor  Wesley Vollmar             Dr. Molyet

3. Background (Problem) Player pianos are expensive
Obtrusive internal modifications of piano
Musicians are expensive
Musicians may not know and be ready to perform all genres of songs

4. Background (Solution)
Play the piano autonomously via computer software
Do not modify or damage the piano
Be contained and unobtrusive
Use modular design to be scalable
Be cost effective and easy to use

5. Background (cont.) Uses existing technologies
PWM (Pulse Width Modulation)
MIDI (Musical Instrument Digital Interface)
Use knowledge gained through University education
Computer Programming
Electrical Hardware Design

6. Driving Circuitry Actuators Dual Ledex Solenoids
Together pull up 28V
Switched Electronic Control
PWM to create Dynamic Variation and Human-Like Playback (Honors)
Use different PWM duty cycles to reduce heating losses
Power Supply (28V)

7. Pulse Width Modulation

8. Pulse Width Modulation

9. Master/Slave Architecture
Serial Bus
One Master, Multiple Slaves

10. Arduino Overview ATMEGA328 On-board Microprocessor 328K Memory I/O PWM
Analog Inputs
 Programmed in C
void setup()
void loop()

11. Hardware Block Diagram
Serial Communication
DIP Addressing
PWM to solenoid drivers

12. Hardware Slave Schematic

13. Software - Input Parsing
Reads in a single track MIDI file
Pulls out relevant information
Notes
Delays
End of Song
Throws away meta-data, except tempo changes
Stores into database
Must be done very carefully to prevent corruption of the data.

14. Software - Output Control Signals
Read in command signals from database in array
Calculate "tick" time
Run timing delays
Output command signal on serial port
Repeat
Fast enough to simulate chords

15. Software - Serial Communication
Using a Universal Serial Bus (USB) to RS232R (TTL logic levl) converter
Software uses the built in .NET Serial Port object
Can be written to like any file object

17. Software - Graphical User Interface
Simple, clean style
Similar to most other media players
Custom buttons to customize 
     our system
Functions separated on 
     different windows
Custom icon to identify the 
     program

18. Software - Database System.Data.SQLite ADO.NET provider  
 "Most widely deployed SQL database engine in the world"
Used in systems such as Mozilla Firefox
All data stored in one single file
Simple Transaction SQL commands
Requires only file path to access

19. Software - Database Repair
Two Redundant backups stored
Created at system close
Can repair corrupted database at error
Protects against data loss

20. Software - Import / Export
Wes Vollmar's Honors portion of the project
Ability to export and share database contents
Replace or append to current playlist
Gives system mobility
                                        
                                        -    -    -    -    

22. Future Scale up to full sized piano Invest into more key modules
Mass produce using printed circuit boards (PCBs)
Communicate with other MIDI devices
Add other music file functionality

23. Conclusion One octave self playing piano Software controlled
Solenoid key striking modules
Easy maintenance and repair
Self contained 

24. QUESTIONS?

25. References Atmel - ATMega328P
Ledex
Texas Instruments - DRV102