Morning
I took a few measurements yesterday. The first was to see whether the desk was contributing to or causing the 200Hz ish bump, so I redid the measurement then moved the desk to back of the room (well, in front of the sofa) so it wasn't between the mic and speakers.
The results suggest the desk isn't causing that lump, which on the one hand is a good thing:
Having put the desk back, I then moved the desk and mic quite far forward towards the speakers, and started working backwards, moving the desk and mic around 1" at a time. As the purpose was not to find the best position for the desk I didn't measure this perfectly.
I did 21 measurements which covered about 2'. For reference, all my previous readings during the build were taken from "-13 original mic pos".
I then put the desk and mic back to the "-10" position and did a few side to side movements - each movement was about 3". Here are those results:
So finally, I created average readings (thanks Endorka) and they are below:
And finally, a 1/12 smoothing version of the above:
I'm going to try and use the EQ to drop the wide peak that has a centre frequency of around 220Hz, and also to reduce the peak centred on 34Hz.
I will re-do the listening exercise with the MIDI notes and report back on that, to see how it compares to the measurements.
As the above graphs aren't very clear, here are the REW files.