ぎゃく高速 こうそくフーリエ変換 へんかんじゃなかったです
gyakukōsokufūriehenkanjanakattadesu

Noun
Desu Copula

The polite, past negative form of 逆高速フーリエ変換

1. Wasn't an inverse fast Fourier transform.

Past/Perfective
Negative
Polite
Casual Register
Mathematics