Music for prayer and supplication

I currently have the pleasure of co-tutoring a Ruhi Book 7 with two ladies, Sandy and Linda, who make wonderful use of music, in their service of the Faith. For many year Sandy was a member of the "Dream Angels" who would brighten many a gathering with their renditions of 50s hits. Linda hosts musical events at her home. Both work to incorporate music into the core activities, and enlivened our study circle, this weekend, with their singing.
So I thought it would be appropriate to share with you a quote from the writings of Abdu'l-Baha on the use of music.

The Dream Angels
Karen, Sandy, Jennifer, Alejandra, and Melita

O thou honorable one!
Thank thou God that thou art instructed in music and melody, singing with pleasant voice the glorification and praise of the Eternal, the Living. I pray to God that thou mayest employ this talent in prayer and supplication, in order that the souls may become quickened, the hearts may become attracted and all may become inflamed with the fire of the love of God!

(Abdu'l-Baha, Tablets of Abdu'l-Baha v3, p. 512)