I like both. Bec we are the Body of Christ. If mostly deaf are ASL, interpreter should be the same. If Deaf pastor teaching the deaf to penetrate the hearts by the Holy Spirit be great. Both songs and sermons are important, not one over the other. Important part what God honors is those who worship Him in Spirit and Truth, not by just going to church and songs and sermons leaks out of your eyes, or ears or your thoughts. If interpreters, important is not what interpreter decide what to sign by themselves, but for the deaf to understand what interpreter interpret the songs and sermons. If deaf church, must have good sense of signing of the songs as much as sermons. Sadly, many deaf didn't think songs is important, which it is important. I love signing the songs in ASL to pictured who God is and what He has done and also, personal express in Spirit and worship. Either contemporary or traditions. To me, there is so much controversial about the way deaf way of leading and following hearing. To me, its from the heart, and sincere of way of worship. If singing is boring, then don't say, I wait to heaven to sing not here. If so, what would Jesus thinks? Those who lead music, must understand them and ask the Lord for guidance and help which lead him or her to express in Spirit, makes a whole lot different.