The old tradition I recall was oral. There were no radios in some of the houses where I first heard 'it' let alone a record player. The instruments were the very basic kind show, Tin Whistle - Fiddle - Box and in those days the French Fiddle (Harmonica). So besides a 'dot' reader/writer, a rare commodity, there was no other way of passing the music.I believe Aine's show was great precisely because it correctly draws attention to some of the err lesser known sources of Trad.
The Piper you mentioned sounds great - I oughto get the CD and give it a whirl..
Here is something for you PJ there are hundreds of very beautiful 'Old Time' tunes here in the South. Most of the ones I like are influenced by what we call 'Old Time Banjo'. Although records and tabs of the tunes are readily available you'd be lucky to find a player capable of preforming them. Occasionaly a 'picker' passes through who can but mostly it is a rare event. Remind you of the Uillean Pipes and Irish Trad in the 50's?