The commands that I listed from Ephesians and Colossians are also specific. They mention only singing. There is no mention of mechanical instruments as an accompaniament. Add mechanical instruments is the same as adding any other element to the Lord's supper.
No mention of electricity in the sanctuary either.
The problem with what you are saying is that there is not form of any liturgy described in the scriptures. The order of the liturgy has been developed by individual churches.
Following your logic, there should be no service at all. Maybe a prayer and a song...that's it. Obviously, that is not it, sinc every church has a liturgy.
Most are derived from the Roman Catholic Mass, of course, but there are very, very broad variations. Since Paul said nothing about the liturgy, is any liturgy forbidden.
If you are going to take a particular logical position, then it's necessary to take that position to its conclusion. The bottom line is that not everything is described in scripture. What is treated as sacred in worship is sacred, whether it is the order of the service or the music used.
I helped the organ builder install the pipe organ in the church I attended in High School. It was hard work. On the day the organ was dedicated and played for the first time in a service, the dedication included a pledge that the organ never be used for anything other than sacred music. That was the intention, and the practice, in that church from that time on. Nothing but sacred music was ever played on that organ. Even when I took lessons on it from the organist, all music played was from the sacred organ literature.
It is the intention that is important, not the form. Paul said something about this when he said that it was not what went into a Christians mouth, but what was in his heart that was important.
If the intention of music in worship is praise, then the music is praise. I cannot find any way to condemn music in worship in scripture. If you can, then I'd love to see the references.