Some comments:
- The frequency filters (band-pass and notch) should be applied on continuous files. We recommend running these before any other pre-processing step:
- See the order of the introduction tutorials: https://neuroimage.usc.edu/brainstorm/Tutorials
- Advanced tutorial on Elekta recordings: https://neuroimage.usc.edu/brainstorm/Tutorials/VisualSingle
- Summary of the recommended workflows: https://neuroimage.usc.edu/brainstorm/Tutorials/Workflows#Common_pre-processing_pipeline
- If you apply a band-pass filter 1-90Hz: any baseline offset or linear trend is already removed (they correspond to frequencies < 1Hz) => Do not apply any DC offset correction or detrending
- Empty-room: make sure the pre-processing procedure is the same as for the recordings of interest