Is it permissible for a girl to send her fiancé an audio recording of a religious song or a supplication in her own voice?

The suitor is a stranger to the fiancée as long as the legal marriage contract has not been concluded. It is not appropriate for him to listen to her chanting, due to the fear of temptation (fitna). Indeed, women have been prohibited from raising their voices during acts of worship in the presence of men out of fear of temptation. It is disliked for her to raise her voice out of fear of being a source of temptation. For this reason, neither the call to prayer (adhan) nor the iqama (call to commence prayer) are legislated for her. What is legislated for her to alert (the imam) during prayer is clapping, not Tasbih (saying 'SubhanAllah'). Her raising her voice in prayer in the presence of a stranger is disliked for fear of temptation, and she should lower her voice when reciting at night.