Эффект Мегафона!

Как сделать Эффект Мегафона, как здесь: https://yadi.sk/d/T8cgn_pv3H2nAA

Sorry, I don’t speak Russian.

Try this code in the Nyquist Prompt effect:
(requires Audacity 2.1.3)

;version 4

(defun normalize (sig peak)
  (mult sig (/ peak)))

(let* ((sig (multichan-expand #'normalize *track* (get '*selection* 'peak)))
       (sig (mult 3 (clip sig 0.1)))
       (sig (lowpass8 (highpass2 sig 500) 4000)))
  (jcrev sig 1.5 0.5))

Please try this plug-in: https://forum.audacityteam.org/t/public-address-tannoy-effect/45466/1