What I’ve done is import the .CSV file into Excel to get the data into columns. I then filter the column with all the names of the values (/muse/eeg/, /muse/elements/alpharelative, etc…) to isolate what I want to look at. If I want to graph something I’ll copy and paste the filtered data into a seperate worksheet. Usually what’s easiest to look at is the various relative power bands (alpharelative, betarelative, gammarelative, etc…)
As far as fixing the time scale you’d have to look more into the documentation as I’ve not done that with Muse Player .CSV recordings, I’ve been using apps written for NeuroTechX for ERP stuff.
It can be a hassle working with .CSV recordings so Muse Monitor app might make things easier.