I get the point if bannermen, but why play drums or other instruments to let the enemy know exactly where you are?
Hi, while you're waiting for responses here, you may be interested in some earlier threads
/u/GodEmperorTitus on the Napoleonic Era in [The role of Drummer Boys in warfare] (https://www.reddit.com/r/AskHistorians/comments/3xv5k2/the_role_of_drummer_boys_in_warfare)
/u/TRB1783 in [What did the drummer boys in the 17th and 18th centuries do when charging? Did they actually participate in the combat, or did they just kinda awkwardly stand there and drum?] (https://www.reddit.com/r/AskHistorians/comments/3r83xf/what_did_the_drummer_boys_in_17th_and_18th)
a now-deleted account in [Are the cartoon/media depictions of revolutionary war military campaigns (Where soldiers line up and shoot each other) accurate? How did this strategy come to develop?] (https://www.reddit.com/r/AskHistorians/comments/2oiqtp/are_the_cartoonmedia_depictions_of_revolutionary)
/u/XenophonTheAthenian on Ancient Greece in [Did ancient armies actually march in cadence while in formation during battle?] (https://www.reddit.com/r/AskHistorians/comments/2w11tk/did_ancient_armies_actually_march_in_cadence)