Dave Plowman (Rabid Nutter) wrote:

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Anyone know of (hopefully free) software which will give a real time
display of energy bands?

If say you fed white noise into an amp and the output to the PC, it gives
a graphic of the energy at different frequencies - a sort of instant
frequency response trace.


** That job is much better done with "pink noise" - having equal energy per octave or part thereof results in a flat spectrum.

Accurate pink noise sources are not so easy to find and the reading will take some time to average out.

OTOH, for most audio electronics items, a sine / square wave generator plus scope is WAAYYYY better than either for response testing.




...... Phil