位相 いそう変調 へんちょう記録 きろくではありませんでした
isō henchōkirokudewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 位相変調記録

1. Was not phase modulation recording.; Was not a phase modulation record.

Past/Perfective
Negative
Polite
Formal Register
Computing