Quote Originally Posted by xxtwighlight View Post
If repeating both an [A] section and [B] section together with repeat bars [: :]
Should double bars which normally begin and end a new section, be changed to single bars ?
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The “best” answer for your situation depends on your specific chart.

The player will play a chart with either single or double bars. A rehearsal mark and a double bar alerts the musician to the section change.
Sometimes that may make a difference to them or the music.

You can enclose any number of bars within repeat brackets. The enclosed bars will repeat every time regardless of single/double/Marks.

One thing that a double bar does that a single doesn’t, is cause the player to insert an accent, usually a cymbal crash.

I’ve taken advantage of that feature using a whole system [line) of double bars to effect a dramatic change in the as-played phrase.

A double bar is also necessary to resume the drums after a “Break” (tacet)

)BOB