“magic rainbow” music visualizer
DESCRIPTION
“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. - PowerPoint PPT PresentationTRANSCRIPT
“Magic Rainbow” Music Visualizer
The Colors of Sound GroupJamaal Merriweather
Justin McDevittWeston Bell
Robert A. Hicks II
Georgia Institute of TechnologyECE 4007/RP1 (em2)
Senior Design Project – Final PresentationMay 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/GoalsDesign 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
• 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??