/usr/include/ is in libqm-dsp-dev 1.7.1-4.
This file is owned by root:root, with mode 0o755.
..
/usr/include/qm-dsp/
/usr/include/qm-dsp/base/
/usr/include/qm-dsp/base/KaiserWindow.h
/usr/include/qm-dsp/base/Pitch.h
/usr/include/qm-dsp/base/SincWindow.h
/usr/include/qm-dsp/base/Window.h
/usr/include/qm-dsp/dsp/
/usr/include/qm-dsp/dsp/chromagram/
/usr/include/qm-dsp/dsp/chromagram/Chromagram.h
/usr/include/qm-dsp/dsp/chromagram/ConstantQ.h
/usr/include/qm-dsp/dsp/keydetection/
/usr/include/qm-dsp/dsp/keydetection/GetKeyMode.h
/usr/include/qm-dsp/dsp/mfcc/
/usr/include/qm-dsp/dsp/mfcc/MFCC.h
/usr/include/qm-dsp/dsp/onsets/
/usr/include/qm-dsp/dsp/onsets/DetectionFunction.h
/usr/include/qm-dsp/dsp/onsets/PeakPicking.h
/usr/include/qm-dsp/dsp/phasevocoder/
/usr/include/qm-dsp/dsp/phasevocoder/PhaseVocoder.h
/usr/include/qm-dsp/dsp/rateconversion/
/usr/include/qm-dsp/dsp/rateconversion/Decimator.h
/usr/include/qm-dsp/dsp/rateconversion/DecimatorB.h
/usr/include/qm-dsp/dsp/rateconversion/Resampler.h
/usr/include/qm-dsp/dsp/rhythm/
/usr/include/qm-dsp/dsp/rhythm/BeatSpectrum.h
/usr/include/qm-dsp/dsp/segmentation/
/usr/include/qm-dsp/dsp/segmentation/ClusterMeltSegmenter.h
/usr/include/qm-dsp/dsp/segmentation/Segmenter.h
/usr/include/qm-dsp/dsp/segmentation/cluster_melt.h
/usr/include/qm-dsp/dsp/segmentation/cluster_segmenter.h
/usr/include/qm-dsp/dsp/segmentation/segment.h
/usr/include/qm-dsp/dsp/signalconditioning/
/usr/include/qm-dsp/dsp/signalconditioning/DFProcess.h
/usr/include/qm-dsp/dsp/signalconditioning/FiltFilt.h
/usr/include/qm-dsp/dsp/signalconditioning/Filter.h
/usr/include/qm-dsp/dsp/signalconditioning/Framer.h
/usr/include/qm-dsp/dsp/tempotracking/
/usr/include/qm-dsp/dsp/tempotracking/DownBeat.h
/usr/include/qm-dsp/dsp/tempotracking/TempoTrack.h
/usr/include/qm-dsp/dsp/tempotracking/TempoTrackV2.h
/usr/include/qm-dsp/dsp/tonal/
/usr/include/qm-dsp/dsp/tonal/ChangeDetectionFunction.h
/usr/include/qm-dsp/dsp/tonal/TCSgram.h
/usr/include/qm-dsp/dsp/tonal/TonalEstimator.h
/usr/include/qm-dsp/dsp/transforms/
/usr/include/qm-dsp/dsp/transforms/FFT.h
/usr/include/qm-dsp/dsp/wavelet/
/usr/include/qm-dsp/dsp/wavelet/Wavelet.h
/usr/include/qm-dsp/hmm/
/usr/include/qm-dsp/hmm/hmm.h
/usr/include/qm-dsp/maths/
/usr/include/qm-dsp/maths/Correlation.h
/usr/include/qm-dsp/maths/CosineDistance.h
/usr/include/qm-dsp/maths/KLDivergence.h
/usr/include/qm-dsp/maths/MathAliases.h
/usr/include/qm-dsp/maths/MathUtilities.h
/usr/include/qm-dsp/maths/MedianFilter.h
/usr/include/qm-dsp/maths/Polyfit.h
/usr/include/qm-dsp/maths/nan-inf.h
/usr/include/qm-dsp/maths/pca/
/usr/include/qm-dsp/maths/pca/pca.h
/usr/include/qm-dsp/thread/
/usr/include/qm-dsp/thread/AsynchronousTask.h
/usr/include/qm-dsp/thread/BlockAllocator.h
/usr/include/qm-dsp/thread/Thread.h