Breathnach’s tune catalog system
I didn’t find this specific discussion in my searches.
As I understand it, Breathnach used a number system (1,2,3,4,5,6,7 for a seven note scales where 1 represents the root) catalog tunes. I believe he used only the downbeats for reels and hornpipes. I’m not sure how he cataloged jigs.
This system allowed him to identify common tunes regardless of key. He had each tune on a filing card with certain bits of info as well. Then he would file the cards numerically and the common tune or cousin tunes would appear more obvious. When you go through his notes from the CRE books it is interesting how he discovers that some tunes in Chief O’Neil’s are repeated several times, sometime with 2-3 different titles.
I’m wondering if there is a modern system that is analogous to what Breathnach did. I know that Tunepal does something like it but it is key dependent.