Csv file raw data


I have a Muse 2016 headband and I am trying to analyze raw data recorded.
I use muse player to convert ‘.muse’ files to ‘.mat’ or to '.csv’
I have 2 questions:

  1. What does the 5th channel (column) of raw data refer to? I guess the first 4 are TP9, TP10, AF7, AF8, but what is the 5th?
  2. Once I converted the .muse file to ‘csv’ or ‘mat’, I see that there is only one channel for each alpha, beta… signals. I’d like to have the alpha, beta… signals for each channel (i.e. Alpha TP9, Alpha TP10, Alpha AF7, Alpha AF8). Is there any way to obtain them?
    Thanks you,