The ear-learning thing was something I had to acquire when I started playing ITM seriously, and especially when I started attending sessions.
I came from the Highland pipe scene, where it’s all about written music. “What book is that in?” is the common phrase a Highland piper will say when he hears a tune he likes. Some Highland pipe albums have the source book of each tune notated in the track listing.
Pipe bands learn their new tunes by sitting around a table with their practice chanters, passing out sheet music, and going over the music slowly and labouriously (sometimes phrase by phrase, or even bar by bar). Of course when pipe bands play there’s no sheet music so the goal is to “have the tunes off” as quickly as possible; but it all starts with sheet music. It may take weeks to get the tunes up to speed on the practice chanters, more weeks to get the tunes “up on the pipes” without sheet music.
So it was amazing when I started going to ITM sessions and heard musicians, when hearing a tune they had never heard before, be playing it up to speed by the session group’s 2nd or 3rd playing of it.
I eventually got to that point myself. The breakthrough was when I realized that traditional Irish reels and jigs aren’t through-composed but are assembled from stock traditional motifs or phrases, building blocks one might call them, sort of like DNA.
Once one has all these building blocks under one’s fingers, when hearing a new tune it’s not as if you have to remember a unique string of notes, but only remember which of the familiar building blocks to use, and in what order. This makes learning tunes far faster and easier.
When I hear a new reel or jig the first thing my ear grabs is where the rolls are, which is where the melody parks on a note for a bit. Then I’ll hear the arpeggios, scalar runs, the “rocking” phrases, and the stepladder things (I don’t have a name for them, things where the tune goes CABGAF# and so forth). Those things, pretty much, constitute the sum total of most traditional reels and jigs.
So say I’m hearing a jig for the first time. In the first part I hear a roll on E, then a roll on B, then a roll on E, then a downward arpeggio. I’ve only had to recognize the placement of three rolls and one arpeggio to learn the first phrase of the jig! Rather than having to learn twelve individual notes, as I would if I imagined the jig as being a through-composed string of eighthnotes.
-roll on low E
-roll on B
-roll on low E
-descending D Major arpeggio A F# D
and Bob’s your Uncle, the first phrase of the jig, only four elements.