Function
Filters the data between the specified low cutoff and high cutoff using a 3rd-order Butterworth.
Individual channels can be set to have different parameters by highlighting them in the "PARAMS" tab, but this won't be reflected in the editor itself.
Known issues
Occasionally, the filter settings will only update for every other channel. If this happens, remove the Bandpass Filter from the signal chain and drag another one back in.
Parameters saved
Low cut and high cut for each individual channel.
Upgrades needed
Make it easier to visualize the settings for each individual channel (this is a more general UI issue that we have yet to solve). Allow the user to change the order and type of the filter. BONUS FEATURE: display the FR curve for the chosen filter, and maybe even the phase delay! And could we have this information propagate to the Spike Detector so it knows how to properly offset the spike times?