This is a old worksheet plotting frequency response of the amplifier.
It is 2-nd order analogue filter followed by simple digital filter (moving average of 4 samples).
For some reason 6179 can't calculate it while 5973 can.

amplifier_freq_response.sm (27 КиБ) скачан 109 раз(а).

In Mag(f) use abs() instead of Abs(); seems Abs() has some kind of issue with vectorize(), I'll take a look on it when possible, even if since the introduction of vectorize() Abs() shouldn't be really needed.