The language is pretty terse, so it's hard to get a concise idea of what's being proposed. I think another one of their posts tries to put it more concisely (thanks to _Microft for the link) [0]:
"""
1. Truly spontaneous speech is un-musical.
2. The perception of non-spontaneity in speech suppresses the evaluation of truth.
3. When truth evaluation is suppressed, hypothetical emotions retain their full intensity.
"""
Or, put another way, "Spontaneous speech is un-musical. Musical speech suppresses the critical thinking in favor of emotion. Since musical speech allows circumvents critical reasoning, this allows for more intense emotional impact of music/musical speech".
If I've understood the hypothesis correctly, this gives the basis for understanding why music has (more) emotional impact than just speech.
[0] https://whatismusic.info/blog/TheNegativeSuperstimulusTheory...
"""
1. Truly spontaneous speech is un-musical.
2. The perception of non-spontaneity in speech suppresses the evaluation of truth.
3. When truth evaluation is suppressed, hypothetical emotions retain their full intensity.
"""
Or, put another way, "Spontaneous speech is un-musical. Musical speech suppresses the critical thinking in favor of emotion. Since musical speech allows circumvents critical reasoning, this allows for more intense emotional impact of music/musical speech".
If I've understood the hypothesis correctly, this gives the basis for understanding why music has (more) emotional impact than just speech.
[0] https://whatismusic.info/blog/TheNegativeSuperstimulusTheory...