In reading accounts, there are frequent mentions of campfire singing. As of a few years ago, only one album of Civil War era music was available, and gave me more insight. Some of the emotion was quite strong.
I was pleased to find this online video listed, but it was something of a let down, more an anecdote with accompaniment.
There were books with lyrics of the era available as mentioned above, but the ones I located were without scores.
Do CW re-enactors do music or only recreate battle?

Great article, however, I had always heard that the "Home Sweet Home" part occurred at the Battle of Stones River in Tennessee.

Unfortunately, the author of this piece, talked about brass bands in half the video and played string band music. String bands, and music in camp had it's place, but that was not the music of the regiments that went to war. That music was provided by regimental brass bands, such as first band shown, the Elmira Cornet Band. That band enlisted in, and became the Band of the 33rd New York Infantry. Town band, after town band enlisted with the local regiments. So many bands, that by the middle of 1862, Congress passed a law mustering out the regimental bands, but allowing brigade level bands, because the bands were too expensive. The number of bands only increased, because along with brigade bands, Colonels of the various regiments complied with the law mustering out the "official" bands, and then detailed men from the ranks, to form a replacement band. I have been researching these bands for over eleven years, and had the records of over 2000 bandsmen in my hands, both official bandsmen, and detailed from the ranks. The author of this video missed the mark by interviewing only a string band musician.

Interesting to have members of a string or camp band (and they are quite good) talk about music of the Civil War, yet almost every photo is that of the brass bands and field music that were prevalent during the conflict.

Of all the memories veterans recalled of their Civil War experience, countless reminiscences of field and brass band music can be found in thousands of letters and journals of soldiers who fought on both sides. Music played such a large part of the war and the field music of fifers, drummers and buglers was not only necessary for telling the time of duties in camp but also guided the actions of troops in battle.

At the start of the War there were few military bands. State militia bands were very highly valued as they participated in musters, ceremonies, parades and were useful in recruiting soldiers. As state militias were mustered into service they naturally brought along their bands. Within a few months of the start of the war, Congress authorized the creation of Regimental bands for the Regular Army.

The War Department General Order no. 48 issued on 31 July 1861 entitled 2 field musicians (buglers or fifes and drummers) per company and a band of 16-24 musicians for each regiment. This led to the formation of hundreds of bands and the enlistment of thousands of musicians whose duties were solely to provide music for the Army. The musicians were considered noncombatants and had few duties outside their musical ones. These brass bands played a significant role in the life of soldiers. They were the pride of their units and it was acknowledged that they provided the morale boosting so badly needed. Many letters from soldiers of the time attest to their appreciation of good band music.

Here are two videos to check out:

CW Brass Bands
http://www.youtube.com/watch?v=jPFdMurkYrw

CW Field Music CW
http://www.youtube.com/watch?v=PMRYTaILXA4

Please do more research on music of the civil war!

The music of the Fife and Drum, beloved by many to this day, also played a role in both the day-to-day camp life, the marching and the general entertainment of the soldiers.
Certain drum beats and fife tunes communicated messages that were conveyed for a long distance - such as reveille, breakfast call, dinner call, tattoo (bedtime). Many of these are captured in an 1862 publication by Bruce and Emmett for Field Musicians that was used at a U.S. Army school located on Governor's Island in NY Harbor. In fact, there is a tune by the name "Governor's Island". Also in this book, is the original version of Dixie (yes, a Union publication), written by Dan Emmett, from Ohio. This happens to be a tune from the CW era, and one of Lincoln's favorites, but many tunes played during the CW can be traced back to the earliest days of the United States - and the origins of the people comprising our new country.

Robert E. Lee once said, "Music is the soul of an Army." How true a statement. Even today, our military bands serve a very important function not only within our army but also within our society. As we go into our July 4th Independence Day celebration, this should be very evident. Another interesting point was the popularity of the banjo because of the civil war. It was a fairly new instrument with pure American roots and was a very popular camp instrument among the soldiers. It was easy to produce (sometimes made of cigar boxes and a tree limb), easy to disassemble and transport when marching, and it allowed to common soldier to make his own music in camp. The songs of Stephen Foster played on the banjo were very popular in both armies.

Sad and touching to think about warring factions both playing "Home, Sweet Home." I had never heard that Civil War detail prior to watching this video.

That was the best video about the Civil War I had ever seen. I never new the fact of both armies, both on opposite sides of the river playing the same song.