Add Audio Variables — Bass/Mid/Treble Band Energy Extraction - #7
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lannerwsf wants to merge 2 commits into
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Add Audio Variables — Bass/Mid/Treble Band Energy Extraction#7lannerwsf wants to merge 2 commits into
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Implements the 'Add Audio Variables' feature request (devlup-labs#2): - Compute band loudness from FFT magnitudes: - Bass: 20–250 Hz - Mid: 250–4000 Hz - Treble: 4000 Hz – Nyquist - Add EMA-smoothed (attenuated) variants: bassAtt, midAtt, trebleAtt - Expose all six values through FFTProcessor and AudioProcessor APIs - Smoothing factor of 0.15 for natural decay response Reference: projectM implementation pattern for band energy extraction.
…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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Add Audio Variables — Bass/Mid/Treble Band Energy Extraction
Closes #2
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This PR adds frequency band energy extraction with EMA smoothing to the audio processing pipeline, following the projectM reference implementation pattern.
audio/FFTProcessor.h/audio/FFTProcessor.cppcomputeBandEnergies()private method that divides FFT magnitude bins into three frequency ranges:bassAtt,midAtt,trebleAtt) with smoothing factorSMOOTHING = 0.15getBass(),getMid(),getTreble(),getBassAtt(),getMidAtt(),getTrebleAtt()src/Audio.h/src/Audio.cppFFTProcessorgetFFTData()in the same render cycle contextVerification