The Lenten services at our church are amazing.
The music, accompanied by violin, is lovely and haunting. We've used a liturgical setting by Marty Haugen for the past 9 years, and the congregation sings it with a depth of skill, feeling, and meaning that comes from knowing it well.
I think sometimes we underestimate the grace of congregational singing. There is something about singing well together that brings a sense of being whole and healthy. Each of us sings our own part, and each part of the whole makes the whole lovely and strong. Together we are making something -- a song -- offering it in worship to God.
That must be pleasing to Him!