One of the relaxing TV shows you can watch are musical shows. It doesn’t have to be someone is performing, plain instrumental is relaxing too. It could be a saxophone, piano, or percussion instruments.
If the performer plays it right he puts on the good show, no vocals needed. Listening on television gives desirable effect to the ears but what more if you could watch it live right? It’s like you heard the angels come down and sung you a lullaby, and also depends on the types of amps
. Music indeed is one of the greatest discovery of mankind, not just for entertainment but for other usage as well.