I was at a Christmas church service on Monday and the quartet of singers was making two classic errors in a particular piece, one in the first measure and the o

I was at a Christmas church service on Monday and the quartet of singers was making two classic errors in a particular piece, one in the first measure and the other in the second measure of the refrain: The first was singing a triplet rhythm (even quarter note triplets) as a dot-dot-whole (dotted eighth, dotted eighth, eighth). The second was singing a dotted rhythm (dotted quarter note, eighth) as a triplet (i.e. swung eighths). It was amusing