/usr/include/qm-dsp/dsp/ is in libqm-dsp-dev 1.7.1-4.
This file is owned by root:root, with mode 0o755.
..
/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