How to print a list of the frequencies that are in the spectrum?

[Dor Ratz]

Hey,

How can I print a list of the maximal frequencies that are in the spectrum?

For example, I connect this signal source with frequency of 1KHz, so I want to print 1KHz:

There is the input_items[0], but if I try to print (max.input_items[0]) I get the power of incoming signal and not the frequency, so I'm not how to do it.

Thanks,

Dor