I LOVE listening to Tibetan Singing Bowls. There are some really good collections out there on You Tube.
https://www.youtube.com/watch?v=OW7TH2U4hps
Another CD I like is called, ‘Toning’ by Anthony Newman. He introduces you to different musical vibrations. Some work better than others for each person and are meant to promote healing.
The CD just relaxes me completely. Sample:
https://www.youtube.com/watch?v=OcM3Z8tT6-I
I love ASMR recordings, but it drives my sister batty:
https://www.youtube.com/watch?v=GVkB_r8BW1c
you should hear the glass harmonica! ben franklin invented it!