Some regiments had ZERO buglers......other's 1,2, 10 (1st Mass. Infantry), 12 (83rd PA up until Yorktown), 2-3 per COMPANY (Berdan's, 15th Ohio, sharpshooter units,5th AL Battalion (Major Blackburn hisself bugled). Most Colonel's gave them an order to stay by their sides at all times. The 2nd + buglers were used on the skirmish line.
On the MARCH, in column of route, the fifers and drummers (and colors) would precede the regiment....colors streaming, and a cavalcade of sound coming from the field musics or Brass Band.
If in a Column of Manouevre, the color guard would tuck into the column of 4s (marching by usually the right flank) and the field music's would march on the side opposite the colors (usually left side of the column). Technically the band is further to the left of the field music's. When the battalion fronts, the field musics aligns itself to the left of the color guard ON the right side of the left center company.....and the band is behind the field musics. It's all in the manuals on pacings, etc.
Horniste! Blas das Signal zum Angriffe!
"But in the end, it's the history, stupid. If you can't document it, forget about it. And no amount of 'tomfoolery' can explain away conduct that in the end makes history (and living historians) look stupid and wrong. "