Transcript “Magic Rainbow” Music Visualizer - Georgia Institute of Technology

“Magic Rainbow” Music
Visualizer
The Colors of Sound Group
Jamaal Merriweather
Justin McDevitt
Weston Bell
Robert A. Hicks II
Georgia Institute of Technology
ECE 4007/RP1 (em2)
Senior Design Project – Final Presentation
May 3, 2010
Project Overview
• What: LED music spectral intensity visualization system.
• Why: Enhance musical experience for the hearing impaired.
• Who: Individuals with hearing disabilities.
• Prototype Equipment Cost: $795.62. (add power supply)
$20.52
Design Objectives/Goals
Design Objective
Proposed Implementation
Actual Implementation
Portability
Weighs under 20 lbs and
maximum enclosure size 20” x
20” x 6”
Weight <5 lbs,
Enclosure size ~ 8” x 12” x 5”
Visual response to
audio input
LED Zones indicate
intensity/power levels through
LED brightness or quantity of
LEDs illuminated.
LED Zones indicate
intensity/power levels through
LED brightness.
Versatility
USB compatible; 2GB (or greater)
of system memory; Simulink and
drivers installed
USB compatible; 2GB (or greater)
of system memory; Simulink and
drivers installed
Low Power
Requirements
Maximum: 2 W (DAQ Digital
Power Supply)
Maximum: 25 W (External Power
Supply)
Maximum: 2 W (DAQ Digital
Power Supply)
Maximum: 25 W (External Power
Supply)
Typical: 20 W (Total)
Overall Design Layout
Final Design in Chassis
Software Flow Diagram
Band Separator
Band Averager & Gain
PWM Conversion
Hardware Flow Diagram
LED Zone Circuit Schematic
Resistor Values and Duty Cycle
Demonstration Plan
• Zone Isolation: Playback of 8 .mp3 files containing a single
frequency in the center of each zone’s bandwidth.
• Portability: Demonstrate compliance with weight and size
specifications.
• Playback of .mp3 songs from various genres to illustrate
appropriate response. (Classical, Rock, Techno, etc…)
• Demonstrate compatibility with microphone input.
• Power Requirements: Measure power consumption of LED
zones (less than 25 W).
Problems & Issues
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Real Time vs. Simulation Time.
Post-FFT Sampling & Form Conversion Timing.
DAQ recognition in Simulink.
DAQ Power Supply Malfunction.
Brightness and low viewing angle of LEDs.
Optimal Circuit layout for Soldiered LED zones
(size constraint).
Equipment Costs
Product Description
Quantity
Unit Price
Price
NI USB-6509 DAQ
1
$449.00
$449.00
CP-50LP Connector
Block
1
$79.00
$79.00
R1005050 Ribbon Cable
1
$79.00
$79.00
DAQ Power Supply
1
$49.00
$49.00
Standard 5mm LEDs
250
$0.09
$22.50
Experimenter Board
2
$2.90
$5.80
A6276EA-T LED Driver
12
$2.69
$32.28
5V, 5A Power Supply
1
$20.52
$20.52
TOTAL COST
$737.10
Future Work
• Use SPI with Simulink to indicate frequency band
intensity through number of LEDs lit.
• Explore additional sensory outputs such as vibration.
• Expand user friendliness by designing GUI.
• Incorporate higher-level feature extraction (timbre,
mood, etc).
• Adapt design for standalone use (for example, with
IPod) by performing signal processing on a
microcontroller.
Any Questions??