The correct view is that reading the Quran with the rules of Tajwid is not obligatory. Tajwid is only a means of making one’s recitation more beautiful. If a person reads and pronounces the letters clearly with the vowels as marked, then this is sufficient.

There is no sin in listening to the Quran when doing Ghusl or relieving oneself, because it is not mentioning Allah inside the toilet as the recorder is outside the bathroom.