Department

Department of Electrical and Computer Engineering

First Advisor

Dr. Stanislaw Legowski

Description

Music is a language that can be shared with everyone. However, it’s a shame that in most cases, music can only be enjoyed through listening. Our project aims to incorporate a visual component to any audio si gnal. Granted, audio visualizers are nothing new, but most are created digitally within software; our visualizer is created robustly using analog methods. We intend to process a stereo audio signal to be used to illuminate an LED array based on the frequen cies within the signal. The signal is first amplified using a class - D amplifier. It is then processed using two groups of eight analog filters, one group for each channel of the audio. After filtering is complete, the signal will then be converted to a DC voltage. This voltage will be inputted into a small pulse width modulation generator. The output of this generator will be used to control a small current driver that is connected to the LED array, allowing for LED brightness to be controlled via the signa l voltage. All of our components are to be compactly housed so that the visualizations can be enjoyed anywhere.

Comments

Oral and Poster Presentation, Volpi and Cupal Senior Design Fund

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Frequen cy Dependent Audio Visualizer

Music is a language that can be shared with everyone. However, it’s a shame that in most cases, music can only be enjoyed through listening. Our project aims to incorporate a visual component to any audio si gnal. Granted, audio visualizers are nothing new, but most are created digitally within software; our visualizer is created robustly using analog methods. We intend to process a stereo audio signal to be used to illuminate an LED array based on the frequen cies within the signal. The signal is first amplified using a class - D amplifier. It is then processed using two groups of eight analog filters, one group for each channel of the audio. After filtering is complete, the signal will then be converted to a DC voltage. This voltage will be inputted into a small pulse width modulation generator. The output of this generator will be used to control a small current driver that is connected to the LED array, allowing for LED brightness to be controlled via the signa l voltage. All of our components are to be compactly housed so that the visualizations can be enjoyed anywhere.