音響 おんきょう調整 ちょうせい たくではありませんでした
onkyōchōsei takudewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 音響調整卓

1. Was not an audio mixing console.; Was not a soundboard.

Past/Perfective
Negative
Polite
Formal Register