To the Left Face | Revolutionary War Drill

British and American drum signal for Left Face (2 Single Strokes & Flam).
Video includes commands, as they appear in the 1764 British Drill.
The corresponding drum beating follows.
There are stick clicks that mimic the "1-2" spoken in drill to denote the movements.

[@GeneralNatGreene]

When would the soldier have executed the command, if verbal and drum commands were both given? After the verbal command, or after the flam in the drum signal? Was this consistent across commands?
Great work giving audio to these commands that can otherwise be hard to grasp simply from reading the sources. Thanks!

[@johnc.78]

My understanding is that you'd either use one or the other. (I believe I have this cited somewhere, but I'd have to really look for it.) Basically I don't think combining them would work. When you think about how verbal commands are delivered - Preparatory - Executive "Left - FACE" - the execution command signals for the men to execute the command now, so that they move together. When you use the drum signals, the Flam is the same as that execution command. If you tried to merge these two commands, I think it would be far more confusion than help.
Unfortunately when it comes to re-enacting purposes, we really don't have the scale or time to train that makes these drum commands useful and of course we fall into re-enactorisms of trying to do both.