“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
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).
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.