All strings added in Phase II are low strings. The decisions on what to add and where, were evolutionary based on the recording process.
First. In the process of creating the new arrangement for Welcome Home for this recording, we decided to stick with the author and composer's use of an acoustic instrument. That was based on conversations with her which revealed she felt strongly about staying away for a traditional church organ sound. Thus, even though we added additional layers of musical resources to the song beyond the original solo acoustic guitar and solo voice, we stuck with the acoustic folk flavor.
That meant we could not use an alternative sound like Christian Rock, which uses instruments like electric bass guitar and drums.
We had already added a lower acoustic guitar harmony to the accompaniment. So, to add a truely resonate acoustic bass component to the accompaniment, we added string bass, thus preserving the acoustic, more folk sound of the arrangement.
We also added string bass to the Beethoven tune for the hymn Joyful, Joyful.
Second. When we were creating the interlude for Amazing Grace, the originally envisioned baby bagpipe turned out to be in a different key than the hymn, which meant as originally recorded it could not be used with the handbells and handchimes in recording.
So to add the needed melody line to the handbell/handchime interlude in Amazing Grace, we decided a warm sounding cello could be used to provide the needed melody line for the handbell and handchime accompaniment.
That plan changed when David took over providing all remaining post production processing. In that roll he was able to retune the baby bagpipe recording into the key of the recorded Amazing Grace. Thus, we reverted to the originally conceived idea of using the baby bagpipe in the the interlude with the handbells, and moved the cello parts to the beginning to become the introduction.
Cello was also added to the last verse of Just A Closer Walk with Thee, to add a warm harmony line along with the handbell and handchime accompaniment.
Thus, Phase II ended up adding both cello and string bass on a couple of the hymns and songs.