Welcome to the SEM escape lab
5th and last Key
Matching the waves
Find the coefficients and match the signal.
4 sinus, each being twice the frequency of the latter. 1 division coefficient for each one.
Find those 4 values, then the key will be slowerCoefficient + 2 * fasterCoefficient + 4 * fasterfasterCoefficient + 8 * fastestCoefficient !
PS: 1st coefficient is 0