David Chang, Erick Van Houten, Brady Mayes, Chris Olson

1
The Real Guitar Hero II
David Chang, Erick Van Houten, Brady Mayes, Chris
Olson
dmc044000_at_utdallas.edu, epv021000_at_utdallas.edu,
brm016000_at_utdallas.edu, cto021000_at_utdallas.edu
Department of Electrical Engineering Erik Jonsson
School of Engineering Computer
Science University of Texas at Dallas Richardson,
Texas 75083-0688, U.S.A.
Project Results
Project Goals

• Simulation through MATLAB
• 1 tone at 440Hz
• Extremes at 82.41Hz and 1479.98Hz
• 55Hz and 1760Hz
• ModelSim Simulation
• Input 1 tone at 440Hz

• 100Hz and 500Hz
• All musical frequencies

• To convert the analog output of an electric
  guitar into a digital signal and sent to a
  processor via USB
• Design the unit so that it can operate solely on
  the power provided in a USB interface
• Improve upon previous design
• Ease of simulation
• Physical size
• Price of device

Project Overview

• Previous Design
• Amplification of Original Signal from Electric
  Guitar
• Processing of Signal through Band Pass Filtering
  and Beat Detection
• Decode/Encode Results
• Quantize Original Signal
• Digital Signal Sent to Processor via USB
• New Design
• Use of FPGA to conduct signal-processing
• Quantizer quantizes input analog signal into
  8-bit stream
• FFT Core samples signal through clock while
  simultaneously computing the Fourier Transform

Project Conclusions/Outcomes

• While the Core Generator provides a convenient
  Fast Fourier Transform
• algorithm and implementation, its generality
  leads to an implementation
• which does not exactly fit our preferred
  solution
• An extra stage is required to normalize the
  Fourier Transform results
• for our application
• Simulation through ModelSim provides an
  adequately accurate portrayal
• of actual functionality
• 2 second delay using this method, may be
  unacceptable