I was detailed to the regimental band

the long version

"John F. Bieniarz, a modern-day Civil War brass bandsman, has done extensive research to prove the existence of hundreds of regimental brass bands after August 1862. Starting with Massachusetts, the author presents his case regiment by regiment, proving the existence of approximately 50 brass bands, when the state only authorized 23. How was this possible? Because privates from the ranks were ... detailed to the regimental band. His work on New Hampshire and Vermont is presented here ..."--Publisher's description.