Wavebuilder: Outputs the same noise curve for different filter orders

[t-b]

For epoch type noise, duration 1000, amplitude 1, low pass 100, high pass 10 we get the same curves for filter order 5 and 6, and 7 and 8 and so on.

I guess is this is a property of the created filter.

Same issue with the butterworth SF operation.

[t-b]

Asked WM for help.

[t-b]

WM confirmed that the order for bandpass filters will be made one larger if it is odd as the internal implementation requires an even value.

Remedies:

• Fix the order up for the user with a warning message
• Don't allow to input odd numbers for bandpass/bandstop in the Wavebuilder GUI
• SFH_Assert in SF for butterworth