When did worship become synonymous with music? God created each of us to worship Him with our lives. It is the purpose of our being. When we gather at a church, it is true we go there to worship God corporately. But that worship is the entire service, not just the portion with musicians leading everyone in song. The very act of coming together in unity is worshipping God because we are obeying what He tells us to do.
When we listen to a sermon, we are worshipping God by meditating on His Word. Welcoming visitors to our gathering is worship because it brings glory to God. We worship God by contributing a portion of what He has entrusted to us into the offering. Every part of the service should be a form of worship to our great King.