“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
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“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
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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
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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)
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Overall Design Layout
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Final Design in Chassis
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Software Flow Diagram
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Band Separator
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Band Averager & Gain
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PWM Conversion
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Hardware Flow Diagram
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LED Zone Circuit Schematic
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Resistor Values and Duty Cycle
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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).
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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).
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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
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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.
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Any Questions??