Voice is too loud

So the point of this app is the tones. Glenns voice is too loud for me to hear the tones. If I turn the volume up enough to really let the "tones wash over me" as instructed, the voice would be overwhelmingly loud. I have the volume up enough for his voice to be comfortable- on the verge of being uncomfortable, and at that level I can barely hear the tones. His voice is easy to listen to. I have used the app for 5 days.

Kona Wahine about 417hz Solfeggio Sonic Meditation by Glenn Harrold & Ali Calderwood