![]() ![]() In any case, we’ve seen great projects like this before, such as this laser-based display. Alternatively, the Pi could be hooked up to a microphone to run the display based on ambient room noise. While the code isn’t able to act as a general-purpose equalizer display for any content played on the Raspberry Pi, creating such a script could be an entertaining exercise for the reader. The visual effect is run via a Python script, which plays a wave file and produces the spectrum graphics via a Fast Fourier Transform. To run the display, an Adafruit RGB Matrix Hat is used with the Raspberry Pi 3B, which makes driving the panel a cinch. The LED display in question is of the 64×64 RGB type, available from Aliexpress and other electronics suppliers online. decided to put together such a display using a Raspberry Pi and a large LED display. This lingered on through the 1990s, and remains a cool look even to this day. Back in the 1980s, spectrum displays on audio equipment were absolutely must have, and the aesthetic came to define the era. ![]()
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