Embedded Systems Design student Zhemao and his class group have been working on an FPGA FFT audio visualizer for their final project. Their design was implemented entirely in VHDL on an Altera DE2 board, the results of which are all bouncy and blue in the above vid. Basically, it’s a hardware audio player that reads audio from an SD card and plays it on the DE2 board’s audio codec while simultaneously displaying an FFT visualization of the audio samples.
Here’s what Zhemao has to say about his group’s project:
It turns out we really don’t need all those frequencies. Most of the audio range is contained in the first two bins you see on the monitor currently. We will change the visualization to only display those frequencies in a later iteration of the design.
If you’re interested in seeing more on the implementation for this project, you can check out Zhemao’s VHDL at his GitHub here.
(via YouTube)
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