High Pass Ripple?

[Lalena]

Hi!

I was testing different guitar pedals with this awesome software and there is one Booster (setted to Unity gain) that has the following Frequency response.

Is that graph accurate, or do I need to "interpret" that in a different way? I searched a lot and found that Filters can have Ripples, but the one Im getting in the graph seems a little too much.

A hint/concept to how can I look at or interpret this fenomena??

Green Line is the original signal, Orange the Test one.

Thanks!

 

[John Mulcahy]

Is the measurement consistent? Best post the mdat.

 

[Lalena]

Hi John! Yes I tested it a coupĺe of times (moving cables, etc) and is exactly the same curve.

I attach here the mdat!

 

[John Mulcahy]

The effect adds a low pass filtered version of the response with a 137 ms delay, so the result looks right.