Project

# Title Team Members TA Documents Sponsor
34 ThereminFreaks - Theremin Rhythm Game
Esteban Looser-Rojas
Michael Recklein
Yhoas Olivas Hernandez
Amr Martini appendix2.pdf
design_document1.pdf
final_paper1.pdf
photo1.jpg
photo2.jpg
presentation2.pdf
proposal1.pdf
We are planning on creating a theremin-based rhythm game for the PC platform. The electrical component is a PC peripheral theremin where the capacitance is controlled by moving one's hands closer or farther from the plates on the theremin controller. We plan on using this capacitance to affect an oscillator's frequency and capture this frequency as a variable on the PC program using USB. Thus the theremin circuit will be connected to a USB controller which will connect to the PC. On the software side, we will make a simple driver for this controller and a video game written in C++ using OpenGL. The way the game works is there is a stream of notes coming at the player. The vertical axis represents the volume to correspond with the loop antenna on the theremin. The horizontal axis represents pitch to correspond with the straight antenna.

Other rhythm games typically involve the player pressing a button or a touch screen and/or simulating a conventional rock instrument like a guitar or a drum set. Some examples are beatmania IIDX, which is a “DJ simulator” and uses a turntable and 7 rectangular buttons and DrumMania which uses an electric drum set to simulate playing a drum. What makes this project unique is therefore the fact that it uses an unconventional instrument where there is no contact between the player and the instrument. And the pitch and volume are continuous rather than being discrete like pressing a piano. A game like Rock Band has a singing mode that is somewhat similar to what we are doing, but it only takes pitch into account and not volume.

Automatic Piano Tuner

Joseph Babbo, Colin Wallace, Riley Woodson

Automatic Piano Tuner

Featured Project

# Automatic Piano Tuner

Team Members:

- Colin Wallace (colinpw2)

- Riley Woodson (rileycw2)

- Joseph Babbo (jbabbo2)

# Problem

Piano tuning is a time-consuming and expensive process. An average piano tuning will cost in the $100 - $200 range and a piano will have to be retuned multiple times to maintain the correct pitch. Due to the strength required to alter the piano pegs it is also something that is difficult for the less physically able to accomplish.

# Solution

We hope to bring piano tuning to the masses by creating an easy to use product which will be able to automatically tune a piano by giving the key as input alongside playing the key to get the pitch differential and automatically turning the piano pegs until they reach the correct note.

# Solution Components

## Subsystem 1 - Motor Assembly

A standard tuning pin requires 8-14 nm of torque to successfully tune. We will thus need to create a motor assembly that is able to produce enough torque to rotate standard tuning pins.

## Subsystem 2 - Frequency Detector/Tuner

The device will use a microphone to gather audio measurements. Then a microprocessor processes the audio data to detect the pitch and determine the difference from the desired frequency. This can then generate instructions for the motor; direction to turn pegs and amount to turn it by.

## Subsystem 3 - User Interface/Display Panel

A small but intuitive display and button configuration can be used for this device. It will be required for the user to set the key being played using buttons on the device and reading the output of the display. As the device will tune by itself after hearing the tone, all that is required to display is the current key and octave. A couple of buttons will suffice to be able to cycle up and down keys and octaves.

## Subsystem 4 - Replaceable Battery/Power Supply

Every commercial product should use standard replaceable batteries, or provide a way for easy charging. As we want to develop a handheld device, so that the device doesn’t have to drag power wires into the piano, we will need a rechargeable battery pack.

# Criterion For Success

The aim of the Automatic Piano Tuner is to allow the user to automatically tune piano strings based on a key input alongside playing a note. We have several goals to help us meet this aim:

- Measure pitch accurately, test against known good pitches

- Motor generates enough torque to turn the pegs on a piano

- Tuner turns correctly depending on pitch

- Easy tuning of a piano by a single untrained person

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