[
  {
    "schema_version": "0.3.0",
    "doc_type": "record",
    "dataset": "on000248",
    "bids_relpath": "sub-01/meg/sub-01_acq-crosstalk_meg.fif",
    "modality": "MEG",
    "datatype": "meg",
    "suffix": "meg",
    "file_extension": ".fif",
    "entities": {
      "subject": "01",
      "acquisition": "crosstalk"
    },
    "signal_summary": {
      "nchans": null,
      "ntimes": null,
      "recording_duration": null,
      "channel_type_counts": null
    },
    "provenance": {
      "digested_at": "2026-06-20T18:13:13.687Z"
    }
  },
  {
    "schema_version": "0.3.0",
    "doc_type": "record",
    "dataset": "on000248",
    "bids_relpath": "sub-01/meg/sub-01_task-audiovisual_run-01_meg.fif",
    "modality": "MEG",
    "datatype": "meg",
    "suffix": "meg",
    "file_extension": ".fif",
    "entities": {
      "subject": "01",
      "task": "audiovisual",
      "run": "01"
    },
    "signal_summary": {
      "nchans": 376,
      "ntimes": 166799,
      "recording_duration": 277.7136813300495,
      "channel_type_counts": {
        "MEGGRADPLANAR": 204,
        "MEGMAG": 102,
        "TRIG": 9,
        "EEG": 60,
        "EOG": 1
      }
    },
    "provenance": {
      "digested_at": "2026-06-20T18:13:13.687Z"
    },
    "signal_properties": {
      "sampling_frequency": 600.614990234375
    }
  },
  {
    "schema_version": "0.3.0",
    "doc_type": "record",
    "dataset": "on000248",
    "bids_relpath": "sub-emptyroom/ses-19210819/meg/sub-emptyroom_ses-19210819_task-noise_meg.fif",
    "modality": "MEG",
    "datatype": "meg",
    "suffix": "meg",
    "file_extension": ".fif",
    "entities": {
      "subject": "emptyroom",
      "session": "19210819",
      "task": "noise"
    },
    "signal_summary": {
      "nchans": 315,
      "ntimes": 66067,
      "recording_duration": 109.9989195644601,
      "channel_type_counts": {
        "MEGGRADPLANAR": 204,
        "MEGMAG": 102,
        "TRIG": 9
      }
    },
    "provenance": {
      "digested_at": "2026-06-20T18:13:13.687Z"
    },
    "signal_properties": {
      "sampling_frequency": 600.614990234375
    }
  }
]