Shock waves' arrangement either side of the octave node will always be symmetrical. Thus the positions for probability of synchronous sonoluminescence generation will also be symmetrical and their relative spacings will represent discrete electromagnetic wavelengths in their own right(s).
Any two synchronous S.L. bubble events that may occur will define, by their symmetrical spacing, an analogue precise new wavelength of electromagnetic radiation with its own implied longitudinal frequency, which passes to the coils, in turn becoming a reciprocal phase controlling force. An 'infinite squaring' function is thus applied to the feedback loop modulus and potential node separation is immediately limited only by fundamental particle spacing.