Audio and M/EEG examples from earlier work on sparse time-frequency methods. More recent work is mostly theoretical: see Research and Publications.
Adapted from xkcd #54 by Randall Munroe (text modified), CC BY-NC 2.5.
K. Siedenburg, M. Kowalski and M. Dörfler -- Audio Declipping with Social Sparsity -- ICASSP'14
Results obtained with TF- MxNE and MxNE for left-ear auditory stimulation with unfiltered combined MEG/EEG data. The estimation with leads to 2 active space space brain locations at the auditory cortices. TF-MxNE leads to smooth time courses and zeros during baseline.