I know what you mean. It looks like .-.., but I pitched that part up a couple octaves so I could hear the sounds (because it's too low frequency for anyone to hear). I am pretty sure that the first . is distinct from the -.. because there is more spacing between them, sound-wise. What I mean is, between . and -, there is more space than between the - and .
That equates to . -.., which is "ED." This is my interpretation.
This is the one I'm unsure of. To me, it looks like .- (a) since the first wave is shorter than the second. Or, maybe they are separate. So, . (e) and - (t).