feat: add audio frequency band variables - #5
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May 20, 2026
…lup-labs#1) Convert the 2D bar graph into a 3D bar graph visualization with: - Perspective projection and orbiting camera for depth perception - X-axis: frequency bands, Y-axis: amplitude, Z-axis: time evolution - 3D bar boxes (6 faces, 12 triangles per bar) with depth testing - FFT history buffer stores up to 64 frames along the Z-axis - Automatic camera orbit for full 3D viewing experience - Age-based dimming on older bars for depth cue - New visualization option devlup-labs#5 in main menu - Dedicated 3D vertex shader with MVP matrix uniforms Files: - src/visualizations/BarVisualization3D.h/.cpp - src/visualizations/vertexShader3D.glsl - src/main.cpp (added option 5) - src/Makefile (added new source)
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Fixes #2