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The scale on your analyser is going from 0 to 50 kHz. That's not handy for sound analyzing (if your not testing the amplifier design or something like that).
You'd better measure between 20 and 20 kHz.
And: Is that your recording room ? I cannot see the perspective well on the photo but it looks quite small and it wouldn't surprise me if it sounds very boxy (for vocals a hump in the 120-400 Hz range). The pannels won't absorb enough to get rid of that in such an extreme (much too small room) situation.
Hans
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