Then I saw that the "amplitude" of my working model was too big. At first I thought I could adjust this all at once with a joint coefficient, but that didn't work.
5
Expression 6: StartFraction, left parenthesis, cos "x" plus cos 2 "x" , right parenthesis Over 2 , EndFractioncosx+cos2x2
6
But the off-beats looked better, so I changed the 1/2 coefficient to act only on the cos(2x).
7
Expression 8: cosine "x" plus StartFraction, cos left parenthesis, 2 "x" , right parenthesis Over 2 , EndFractioncosx+cos2x2