English Translation
The man was found dead in his bedroom in the morning.
The word split is incorrect so as TTS and the transcription are…
Incorrect: 男は朝寝室で死んでいた。（おとこはあさねしつでしんでいた）
Correct: 男は朝、寝室で死んでいた。（おとこはあさ、しんしつでしんでいた）
朝寝（あさね）is a shorten form of 朝寝坊（あさねぼう）, which means “to oversleep in the morning”. There is no such a phrase of 朝寝室（あさねしつ）in Japanese, 朝寝室 even implies “a special room for oversleeping”.