This simple command speaks volumes. In this case, it has two meanings.
First, arrive at the venue in a timely fashion. There is a saying, you have to be early to be on time. Arrive at the venue at least 5 minutes before the agreed time. Being at the venue on time helps everyone involved. It helps you because you are not running around trying to get set up. It helps the sound person because the are not setting up you at the last minute. It help the worship leader because they know they can count on you and they can get the rehearsal/sound check started on time. Being on time also give you time to address any problems that arise.
The second meaning involves tempo. You need to play at the same tempo as the rest of the group. This includes both the beats per minute and the time signature. It is amazing to me to see singers sing in 4/4 when the band is in 6/8. The rhythm section drives the beat and the rest of the group must follow it. Listen to the bass and drums and try to feel what is happening there. It is pretty common for groups to speed up songs. It feels more comfortable to rush things, especially when you are not familiar with the song, but rushing kills the groove.
Being on time is one of the foundations of music.
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