In the States, the GAFilk concom "philched" the idea of a Membership List from the UK filk con's PRs.

GAFilk doesn't mail PRs, so they placed their Membership List on their website.

UK cons don't place their Membership Lists on the web, so...

the Membership List for 1812Tone can be found...

...on the PRs. 

Shave and a haircut = 2 bits!

12-Tone Technique bases the melodies and harmonies of a piece
on an ordering of the 12 notes of the chromatic scale.
The 12 tones of an octave are not centered around any single tone,
but are united by the composer's selected order of tones for a given composition.
This technique represented a clear break with the harmonic formulas of music
that had been developed during the 18th and 19th centuries.